1. A small-size fire smoke flow simulation experiment device comprises a closed room shell and is characterized by further comprising a closed corridor shell communicated with the room shell;

the top end of the room shell is provided with a spraying module fixed mounting seat for fixedly mounting a spraying module, a room sensor module fixed mounting seat for fixedly mounting a room sensor module and a camera fixed mounting seat for fixedly mounting a camera, the spraying module is fixedly mounted on the spraying module fixed mounting seat, the room sensor module is fixedly mounted on the room sensor module fixed mounting seat, and the camera is fixedly mounted on the camera fixed mounting seat;

a temperature and humidity control module fixed mounting seat for fixedly mounting a temperature and humidity control module and M corridor sensor module fixed mounting seats for fixedly mounting a corridor sensor module are arranged at the top end of the corridor shell, wherein M is a positive integer greater than or equal to 1 and is respectively a 1 st corridor sensor module fixed mounting seat, a 2 nd corridor sensor module fixed mounting seat, a 3 rd corridor sensor module fixed mounting seat, … … and an M th corridor sensor module fixed mounting seat, the 1 st corridor sensor module is fixedly mounted on the 1 st corridor sensor module fixed mounting seat, the 2 nd corridor sensor module is fixedly mounted on the 2 nd corridor sensor module fixed mounting seat, the 3 rd corridor sensor module is fixedly mounted on the 3 rd corridor sensor module fixed mounting seat, … …, the M th corridor sensor module is fixedly mounted on the M th corridor sensor module fixed mounting seat, the temperature and humidity control module is fixedly arranged on the temperature and humidity control module fixing mounting seat; a wind speed control module fixing mounting seat for fixedly mounting a wind speed control module is arranged at the left side end of the corridor shell, and the wind speed control module is fixedly mounted on the wind speed control module fixing mounting seat;

the spraying control data end of the spraying module is connected with the spraying data end of the analog-to-digital converter, the data end of the room sensor module is connected with the room data end of the analog-to-digital converter, and the image data end of the camera is connected with the image data end of the computer; an analog data end of the temperature and humidity control module is connected with a temperature and humidity analog data end of the analog-to-digital converter, a data end of an mth corridor sensor module is connected with a mth data end of a corridor of the analog-to-digital converter, M is a positive integer smaller than or equal to M, and a wind speed control data end of the wind speed control module is connected with a wind speed data end of the analog-to-digital converter; the analog-to-digital converter transmits the data to the computer.

2. The small-size fire smoke flow simulation experiment device according to claim 1, wherein the room shell or/and the corridor shell is/are composed of transparent high-temperature-resistant glass plates;

or/and all the glass plates forming the room shell or/and the corridor shell are bonded by adopting organic glass special adhesive, and higher air tightness is ensured on the premise of firmness.

3. The small-size fire smoke gas flow simulation experiment device according to claim 2, wherein a left glass plate of the room shell is composed of two parts, and the two parts are connected through hinges and can be disassembled and opened and closed to form a water outlet;

or/and a burning dish is fixedly arranged at the middle position of the bottom of the room shell, namely the position of the fire source.

4. The small-size fire smoke flow simulation experiment device according to claim 2, wherein a room window is connected with a room shell through a window hinge and can be detached and opened and closed;

or/and a door-shaped hole is arranged between the room shell and the corridor shell, and the smoke can circulate between the room shell and the corridor shell.

5. The small-size fire smoke flow simulation experiment device according to claim 1, wherein the wind speed controller module comprises K fans, wherein K is a positive integer greater than or equal to 2 and is a No. 1 fan, a No. 2 fan, a No. 3 fan, … … and a No. K fan respectively; a kth wind speed controller is arranged in the kth fan, and K is a positive integer less than or equal to K; the kth wind speed controller controls the kth fan to operate according to the wind speed control signal according to the received wind speed control signal;

the system also comprises a wind speed master controller, wherein the kth wind speed data end of the wind speed master controller is connected with the wind speed data end of the kth wind speed controller; the wind speed control data end of the wind speed master controller is connected with the wind speed data end of the analog-to-digital converter;

the wind speed master controller sends operation control commands to the K wind speed controllers according to wind speed control data sent by the receiving computer, so that the fan-out air volume of K 'fans of the wind speed master controller is equivalent to the air volume at the last moment, and K' is a positive integer less than or equal to K.

6. The small-size fire smoke flow simulation experiment device according to claim 1, wherein the spraying module comprises a spray head, a water pump, a water tank, a pressure stabilizing tank and a control box; the spray head is fixedly arranged on the spray module group fixing mounting seat, and the liquid inlet end of the spray head is connected with the liquid outlet end of the water tank through a pipeline;

the water pump and the pressure stabilizing tank are arranged on the pipeline, the control operation end of the water pump is connected with the water pump control operation end of the control box, the pressure control end of the pressure stabilizing tank is connected with the pressure control end of the control box, and the spraying control data end of the control box is connected with the spraying data end of the analog-to-digital converter;

the control box sends control commands to the water pump and the pressure stabilizing tank according to the spraying control data sent by the receiving computer, so that the spray head sprays to the position of the fire source.

7. The small-size fire smoke flow simulation experiment device according to claim 1, wherein the room sensor module comprises a square machine box, and one or any combination of a temperature sensor, a smoke sensor, a CO2 sensor, a humidity sensor, a wind speed sensor and a pressure sensor is arranged in the square machine box;

a fire monitoring and processing circuit board is further arranged in the square case, a fire monitoring controller is arranged on the fire monitoring and processing circuit board, a temperature data input end of the fire monitoring controller is connected with a temperature data output end of a temperature sensor, a smoke data input end of the fire monitoring controller is connected with a smoke data output end of a smoke sensor, a CO2 data input end of the fire monitoring controller is connected with a CO2 data output end of a CO2 sensor, a humidity data input end of the fire monitoring controller is connected with a humidity data output end of the humidity sensor, a wind speed data input end of the fire monitoring controller is connected with a wind speed data output end of a wind speed sensor, and a pressure data input end of the fire monitoring controller is connected with a pressure data output end of a pressure sensor; the data end of the fire monitoring controller is connected with the room data end of the analog-to-digital converter;

probes of a temperature sensor, a smoke sensor, a CO2 sensor, a humidity sensor, a wind speed sensor and a pressure sensor are arranged below the square case;

transmitting the temperature, smoke concentration, CO2 concentration, humidity, wind speed and pressure data measured by the temperature sensor, the smoke sensor, the CO2 sensor, the humidity sensor, the wind speed sensor and the pressure sensor to a computer;

or/and the mth corridor sensor module comprises an mth square machine box, wherein one or any combination of an mth corridor temperature sensor, an mth corridor flue gas sensor, an mth corridor CO2 sensor, an mth corridor humidity sensor, an mth corridor wind speed sensor and an mth corridor pressure sensor is arranged in the mth square machine box;

an mth corridor fire monitoring and processing circuit board is further arranged in the mth corridor square case, an mth corridor fire monitoring and processing controller is arranged on the mth corridor fire monitoring and processing circuit board, a temperature data input end of the mth corridor fire monitoring and processing controller is connected with a temperature data output end of the mth corridor temperature sensor, a smoke data input end of the mth corridor fire monitoring and processing controller is connected with a smoke data output end of the mth corridor smoke sensor, a CO2 data input end of the mth corridor fire monitoring and processing controller is connected with a CO2 data output end of the mth corridor CO2 sensor, a humidity data input end of the mth corridor fire monitoring and processing controller is connected with a humidity data output end of the mth corridor humidity sensor, a wind speed data input end of the mth corridor fire monitoring and processing controller is connected with a wind speed data output end of the mth corridor wind speed sensor, and a pressure data input end of the mth corridor fire monitoring and processing controller is connected with a pressure data output end of the mth corridor pressure sensor The output ends are connected; the data end of the mth corridor fire monitoring controller is connected with the mth corridor data end of the analog-to-digital converter;

probes of an mth corridor temperature sensor, an mth corridor flue gas sensor, an mth corridor CO2 sensor, an mth corridor humidity sensor, an mth corridor wind speed sensor and an mth corridor pressure sensor are arranged below the mth corridor square case;

and transmitting the mth corridor temperature, the mth corridor flue gas concentration, the mth corridor CO2 concentration, the mth corridor humidity, the mth corridor wind speed and the mth corridor pressure data measured by the mth corridor temperature sensor, the mth corridor flue gas sensor, the mth corridor CO2 sensor, the mth corridor humidity sensor, the mth corridor wind speed and the mth corridor pressure sensor to a computer.

8. The numerical simulation combination system method of the small-size fire smoke flow simulation experiment device according to claims 1-7, characterized by comprising the following steps:

s1, opening a room window on a room shell of the small-size fire smoke flow simulation experiment device, and placing a substance to be burnt in a burning dish at the bottom of the room shell; inputting fire source information in a numerical simulation system according to substances to be combusted, and selecting the type of the fire source;

s2, setting the type of a spray head, spray materials and spray pressure used in the small-size fire smoke flow simulation experiment device; setting the type, initial position, speed, diameter and spray pressure of a spray particle substance in a numerical simulation system according to an experimental device, and setting the number and position of particle sources to correspond to the number and position of spray nozzle orifices of a spray module in the experimental device;

s3, a temperature and humidity control module and a wind speed control module in the small-size fire smoke flow simulation experiment device are started and controlled through a computer, the room sensor modules and the M corridor sensor modules are observed to input the temperature, humidity, wind speed, CO2 concentration and pressure curve changes on the computer, and when preset parameters are reached and a stable state is maintained, initial environment parameters are input into a numerical simulation system in the computer;

s4, selecting a proper mathematical model according to the material to be combusted and the initial environment parameters, wherein the selectable turbulence model comprises direct numerical simulation and large vortex simulation; the selectable combustion models comprise a PDF transport model, a vortex dissipation concept model, a vortex dissipation model and a vortex dissipation/finite rate model; the radiation model is set as a DO model, and the sub-relaxation coefficient of the radiation model can be selected to be 0.1-0.3; the selectable smoke models are a single-step model of Khan and greenes, a two-step model of Tesner, a Moss-Brooks model and a Moss-Brooks-Hall model;

s5, igniting the substance to be burnt and starting numerical simulation, observing and recording flame burning change and smoke flowing conditions in the small-size fire smoke flowing simulation experiment device, storing data of temperature, smoke concentration and CO2 concentration measured in the experiment and transmitting the data to a computer; the numerical simulation system outputs the change conditions of a temperature field and a smoke field during combustion and the data of the temperature, the smoke concentration and the CO2 concentration measured by each measuring point, wherein the data of each measuring point corresponds to a temperature sensor, a smoke sensor and a CO2 sensor in the small-size fire smoke flow simulation experiment device;

s6, the flame combustion and smoke flow conditions in the numerical simulation system can be known through the temperature field change and smoke field change in the numerical simulation system, and the flame combustion and smoke flow conditions are compared with those in the small-size fire smoke flow simulation experiment device; if the numerical value change difference is small and the flame combustion and flue gas flow laws are the same, the selected mathematical model is appropriate; if the numerical value changes greatly, the mathematical model is reselected; and (4) repeatedly simulating and comparing with a small-size fire smoke flow simulation experiment device until the numerical simulation error is reduced to an acceptable range.

9. The numerical simulation combination system method of the small-sized fire smoke flow simulation experiment device according to claim 8, characterized in that the step S5 comprises the following steps:

s51, acquiring a combustion picture shot by the camera, and recording the acquired combustion picture shot by the camera as a combustion image;

s52, carrying out image conversion processing on the burning image burnimage to obtain a conversion processed image Convert image;

s53, performing flame feature extraction on the converted image Convert image obtained in the step S52 to obtain a flame image, wherein the flame image is obtained by performing flame image extraction on the converted image Convert image by using a contour line method;

s54, calculating the combustion range of the flame image, wherein the calculation method of the combustion range of the flame image is as follows:

wherein N is_τRepresenting the total number of pixels in the flame image frame, N_ζRepresents the total number of pixel points in the burning image Burn image, representing the total number of pixel points in each row in the burning image, sigma representing the total number of pixel points in each column in the burning image, y representing the height value of the burning image, g representing the width value of the burning image, mu representing the focal length proportionality coefficient, and mu belonging to (0, 1)]，S_tA combustion area indicating a combustion image Burn image captured at time t;

if S_t≤S₀，S₀Representing a preset first area threshold value of combustion, wherein the fire is a first-class fire at the moment; recording the burning time number of the first-level fire;

if S₀＜S_t≤S₁，S₁Representing a predetermined second area threshold of combustion, S₁Greater than a preset first area threshold S for combustion₀Then the fire is a second-level fire; recording the burning time number of the secondary fire;

if S_t＞S₂，S₂Representing a preset third area threshold of combustion, S₂Greater than a predetermined second area threshold S for combustion₁Then the fire is a third-class fire; recording the combustion time number of the three-level fire;

when the three-level fire burning duration is greater than or equal to the preset burning duration threshold, the spraying module works to reduce the fire condition.

10. The numerical simulation combination system method of a small-size fire smoke flow simulation experiment device according to claim 8, wherein in step S5, in order to ensure that the smoke in the room shell is introduced into the corridor shell, the method for controlling the K fans comprises:

s81, judging the number of fans which can not work, and recording the number as A, wherein A is a positive integer less than K; if A is greater than or equal to K, the fan needs to be replaced to carry out the experiment;

s82, acquiring a value V of the air volume to be output, and if K-A is equal to 1, controlling the fan capable of working to work to output V;

if K-A is 2, controlling one fan capable of working to work to make the fan output V; after the time T, controlling the other fan capable of working to work to output V; realizing alternate work;

if K-A is equal to L, and L is greater than or equal to 3 and less than or equal to K, controlling two fans which can work to output V; after the time T, controlling the fans which do not work to work so that the two fans output V; and alternating alternate work is realized.

Background

The discovery and utilization of fire are milestones for the advancement of human civilization and are also important milestones for the advancement of human social civilization. Along with the development of economy, the living standard of people is improved, the infrastructure of China is more and more perfect, and the frequency of fire disasters is more and more high. The fire hazard of the building brings great harm to the safety of human life and property. The existing research on the fire spreading rule of a building is mainly carried out by experimental research and a numerical simulation method. The research on the fire spreading rule through experiments has high accuracy and reliability, but the experiments are inevitably destructive, so the research cost is high and the research is dangerous. The research method of numerical simulation has the advantages of low cost, high visualization degree and extremely low risk, but the result reliability is low due to certain randomness of the selection of the mathematical model in the numerical simulation process, the real combustion process is difficult to accurately reflect, and further, the full credible scientific reference is difficult to provide for the search of the fire smoke flow rule.

Disclosure of Invention

The invention aims to at least solve the technical problems in the prior art, and particularly creatively provides a small-size fire smoke flow simulation experiment and numerical simulation combined system.

In order to achieve the purpose, the invention provides a small-size fire smoke flow simulation experiment device, which comprises a closed room shell and a closed corridor shell communicated with the room shell;

the top end of the room shell is provided with a spraying module fixed mounting seat for fixedly mounting a spraying module, a room sensor module fixed mounting seat for fixedly mounting a room sensor module and a camera fixed mounting seat for fixedly mounting a camera, the spraying module is fixedly mounted on the spraying module fixed mounting seat, the room sensor module is fixedly mounted on the room sensor module fixed mounting seat, and the camera is fixedly mounted on the camera fixed mounting seat;

a temperature and humidity control module fixed mounting seat for fixedly mounting a temperature and humidity control module and M corridor sensor module fixed mounting seats for fixedly mounting a corridor sensor module are arranged at the top end of the corridor shell, wherein M is a positive integer greater than or equal to 1 and is respectively a 1 st corridor sensor module fixed mounting seat, a 2 nd corridor sensor module fixed mounting seat, a 3 rd corridor sensor module fixed mounting seat, … … and an M th corridor sensor module fixed mounting seat, the 1 st corridor sensor module is fixedly mounted on the 1 st corridor sensor module fixed mounting seat, the 2 nd corridor sensor module is fixedly mounted on the 2 nd corridor sensor module fixed mounting seat, the 3 rd corridor sensor module is fixedly mounted on the 3 rd corridor sensor module fixed mounting seat, … …, the M th corridor sensor module is fixedly mounted on the M th corridor sensor module fixed mounting seat, the temperature and humidity control module is fixedly arranged on the temperature and humidity control module fixing mounting seat; a wind speed control module fixing mounting seat for fixedly mounting a wind speed control module is arranged at the left side end of the corridor shell, and the wind speed control module is fixedly mounted on the wind speed control module fixing mounting seat;

the spraying control data end of the spraying module is connected with the spraying data end of the analog-to-digital converter, the data end of the room sensor module is connected with the room data end of the analog-to-digital converter, and the image data end of the camera is connected with the image data end of the computer; an analog data end of the temperature and humidity control module is connected with a temperature and humidity analog data end of the analog-to-digital converter, a data end of an mth corridor sensor module is connected with a mth data end of a corridor of the analog-to-digital converter, M is a positive integer smaller than or equal to M, and a wind speed control data end of the wind speed control module is connected with a wind speed data end of the analog-to-digital converter; the analog-to-digital converter transmits the data to the computer.

In a preferred embodiment of the invention, the room housing or/and the corridor housing consists of transparent high-temperature-resistant glass plates;

or/and all the glass plates forming the room shell or/and the corridor shell are bonded by adopting organic glass special adhesive, and higher air tightness is ensured on the premise of firmness.

In a preferred embodiment of the present invention, the left glass plate of the room housing is composed of two parts, and is connected by a hinge so as to be detachable and openable to form a drain opening;

or/and a burning dish is fixedly arranged at the middle position of the bottom of the room shell, namely the position of the fire source.

In a preferred embodiment of the invention, the room window and the room shell are connected through a window hinge and can be detached and opened and closed;

or/and a door-shaped hole is arranged between the room shell and the corridor shell, and the smoke can circulate between the room shell and the corridor shell.

In a preferred embodiment of the present invention, the wind speed controller module includes K fans, where K is a positive integer greater than or equal to 2 and is a 1 st fan, a 2 nd fan, a 3 rd fan, … …, and a K th fan; a kth wind speed controller is arranged in the kth fan, and K is a positive integer less than or equal to K; the kth wind speed controller controls the kth fan to operate according to the wind speed control signal according to the received wind speed control signal;

the system also comprises a wind speed master controller, wherein the kth wind speed data end of the wind speed master controller is connected with the wind speed data end of the kth wind speed controller; the wind speed control data end of the wind speed master controller is connected with the wind speed data end of the analog-to-digital converter;

the wind speed master controller sends operation control commands to the K wind speed controllers according to wind speed control data sent by the receiving computer, so that the fan-out air volume of K 'fans of the wind speed master controller is equivalent to the air volume at the last moment, and K' is a positive integer less than or equal to K.

In a preferred embodiment of the invention, the spraying module comprises a spray head, a water pump, a water tank, a pressure stabilizing tank and a control box; the spray head is fixedly arranged on the spray module group fixing mounting seat, and the liquid inlet end of the spray head is connected with the liquid outlet end of the water tank through a pipeline;

the water pump and the pressure stabilizing tank are arranged on the pipeline, the control operation end of the water pump is connected with the water pump control operation end of the control box, the pressure control end of the pressure stabilizing tank is connected with the pressure control end of the control box, and the spraying control data end of the control box is connected with the spraying data end of the analog-to-digital converter;

the control box sends control commands to the water pump and the pressure stabilizing tank according to the spraying control data sent by the receiving computer, so that the spray head sprays to the position of the fire source.

In a preferred embodiment of the invention, the room sensor module comprises a square machine box, and one or any combination of a temperature sensor, a smoke sensor, a CO2 sensor, a humidity sensor, a wind speed sensor and a pressure sensor is arranged in the square machine box;

a fire monitoring and processing circuit board is further arranged in the square case, a fire monitoring controller is arranged on the fire monitoring and processing circuit board, a temperature data input end of the fire monitoring controller is connected with a temperature data output end of a temperature sensor, a smoke data input end of the fire monitoring controller is connected with a smoke data output end of a smoke sensor, a CO2 data input end of the fire monitoring controller is connected with a CO2 data output end of a CO2 sensor, a humidity data input end of the fire monitoring controller is connected with a humidity data output end of the humidity sensor, a wind speed data input end of the fire monitoring controller is connected with a wind speed data output end of a wind speed sensor, and a pressure data input end of the fire monitoring controller is connected with a pressure data output end of a pressure sensor; the data end of the fire monitoring controller is connected with the room data end of the analog-to-digital converter;

probes of a temperature sensor, a smoke sensor, a CO2 sensor, a humidity sensor, a wind speed sensor and a pressure sensor are arranged below the square case;

transmitting the temperature, smoke concentration, CO2 concentration, humidity, wind speed and pressure data measured by the temperature sensor, the smoke sensor, the CO2 sensor, the humidity sensor, the wind speed sensor and the pressure sensor to a computer;

or/and the mth corridor sensor module comprises an mth square machine box, wherein one or any combination of an mth corridor temperature sensor, an mth corridor flue gas sensor, an mth corridor CO2 sensor, an mth corridor humidity sensor, an mth corridor wind speed sensor and an mth corridor pressure sensor is arranged in the mth square machine box;

an mth corridor fire monitoring and processing circuit board is further arranged in the mth corridor square case, an mth corridor fire monitoring and processing controller is arranged on the mth corridor fire monitoring and processing circuit board, a temperature data input end of the mth corridor fire monitoring and processing controller is connected with a temperature data output end of the mth corridor temperature sensor, a smoke data input end of the mth corridor fire monitoring and processing controller is connected with a smoke data output end of the mth corridor smoke sensor, a CO2 data input end of the mth corridor fire monitoring and processing controller is connected with a CO2 data output end of the mth corridor CO2 sensor, a humidity data input end of the mth corridor fire monitoring and processing controller is connected with a humidity data output end of the mth corridor humidity sensor, a wind speed data input end of the mth corridor fire monitoring and processing controller is connected with a wind speed data output end of the mth corridor wind speed sensor, and a pressure data input end of the mth corridor fire monitoring and processing controller is connected with a pressure data output end of the mth corridor pressure sensor The output ends are connected; the data end of the mth corridor fire monitoring controller is connected with the mth corridor data end of the analog-to-digital converter;

probes of an mth corridor temperature sensor, an mth corridor flue gas sensor, an mth corridor CO2 sensor, an mth corridor humidity sensor, an mth corridor wind speed sensor and an mth corridor pressure sensor are arranged below the mth corridor square case;

and transmitting the mth corridor temperature, the mth corridor flue gas concentration, the mth corridor CO2 concentration, the mth corridor humidity, the mth corridor wind speed and the mth corridor pressure data measured by the mth corridor temperature sensor, the mth corridor flue gas sensor, the mth corridor CO2 sensor, the mth corridor humidity sensor, the mth corridor wind speed and the mth corridor pressure sensor to a computer.

The invention also discloses a numerical simulation combination system method of the small-size fire smoke flow simulation experiment device, which comprises the following steps:

s1, opening a room window on a room shell of the small-size fire smoke flow simulation experiment device, and placing a substance to be burnt in a burning dish at the bottom of the room shell; inputting fire source information in a numerical simulation system according to substances to be combusted, and selecting the type of the fire source;

s2, setting the type of a spray head, spray materials and spray pressure used in the small-size fire smoke flow simulation experiment device; setting the type, initial position, speed, diameter and spray pressure of a spray particle substance in a numerical simulation system according to an experimental device, and setting the number and position of particle sources to correspond to the number and position of spray nozzle orifices of a spray module in the experimental device;

s3, a temperature and humidity control module and a wind speed control module in the small-size fire smoke flow simulation experiment device are started and controlled through a computer, the room sensor modules and the M corridor sensor modules are observed to input the temperature, humidity, wind speed, CO2 concentration and pressure curve changes on the computer, and when preset parameters are reached and a stable state is maintained, initial environment parameters are input into a numerical simulation system in the computer;

s4, selecting a proper mathematical model according to the material to be combusted and the initial environment parameters, wherein the selectable turbulence model comprises direct numerical simulation and large vortex simulation; the selectable combustion models comprise a PDF transport model, a vortex dissipation concept model, a vortex dissipation model and a vortex dissipation/finite rate model; the radiation model is set as a DO model, and the sub-relaxation coefficient of the radiation model can be selected to be 0.1-0.3; the selectable smoke models are a single-step model of Khan and greenes, a two-step model of Tesner, a Moss-Brooks model and a Moss-Brooks-Hall model;

s5, igniting the substance to be burnt and starting numerical simulation, observing and recording flame burning change and smoke flowing conditions in the small-size fire smoke flowing simulation experiment device, storing data of temperature, smoke concentration and CO2 concentration measured in the experiment and transmitting the data to a computer; the numerical simulation system outputs the change conditions of a temperature field and a smoke field during combustion and the data of the temperature, the smoke concentration and the CO2 concentration measured by each measuring point, wherein the data of each measuring point corresponds to a temperature sensor, a smoke sensor and a CO2 sensor in the small-size fire smoke flow simulation experiment device;

s6, the flame combustion and smoke flow conditions in the numerical simulation system can be known through the temperature field change and smoke field change in the numerical simulation system, and the flame combustion and smoke flow conditions are compared with those in the small-size fire smoke flow simulation experiment device; if the numerical value change difference is small and the flame combustion and flue gas flow laws are the same, the selected mathematical model is appropriate; if the numerical value changes greatly, the mathematical model is reselected; and (4) repeatedly simulating and comparing with a small-size fire smoke flow simulation experiment device until the numerical simulation error is reduced to an acceptable range.

In a preferred embodiment of the present invention, step S5 includes the following steps:

s51, acquiring a combustion picture shot by the camera, and recording the acquired combustion picture shot by the camera as a combustion image;

s52, carrying out image conversion processing on the burning image burnimage to obtain a conversion processed image Convert image;

s53, performing flame feature extraction on the converted image Convert image obtained in the step S52 to obtain a flame image, wherein the flame image is obtained by performing flame image extraction on the converted image Convert image by using a contour line method;

s54, calculating the combustion range of the flame image, wherein the calculation method of the combustion range of the flame image is as follows:

wherein N is_τRepresenting the total number of pixels in the flame image frame, N_ζRepresents the total number of pixel points in the burning image Burn image, representing the total number of pixel points in each row in the burning image, sigma representing the total number of pixel points in each column in the burning image, y representing the height value of the burning image, g representing the width value of the burning image, mu representing the focal length proportionality coefficient, and mu belonging to (0, 1)]，S_tA combustion area indicating a combustion image Burn image captured at time t;

if S_t≤S₀，S₀Representing a preset first area threshold value of combustion, wherein the fire is a first-class fire at the moment; recording the burning time number of the first-level fire;

if S₀＜S_t≤S₁，S₁Representing a predetermined second area threshold of combustion, S₁Greater than a preset first area threshold S for combustion₀Then the fire is a second-level fire; recording the burning time number of the secondary fire;

if S_t＞S₂，S₂Representing a preset third area threshold of combustion, S₂Greater than a predetermined second area threshold S for combustion₁Then the fire is a third-class fire; recording the combustion time number of the three-level fire;

when the three-level fire burning duration is greater than or equal to the preset burning duration threshold, the spraying module works to reduce the fire condition.

In a preferred embodiment of the present invention, in step S5, in order to ensure that the room housing introduces the smoke into the corridor housing, the method for controlling the K fans is as follows:

s81, judging the number of fans which can not work, and recording the number as A, wherein A is a positive integer less than K; if A is greater than or equal to K, the fan needs to be replaced to carry out the experiment;

s82, acquiring a value V of the air volume to be output, and if K-A is equal to 1, controlling the fan capable of working to work to output V;

if K-A is 2, controlling one fan capable of working to work to make the fan output V; after the time T, controlling the other fan capable of working to work to output V; realizing alternate work;

if K-A is equal to L, and L is greater than or equal to 3 and less than or equal to K, controlling two fans which can work to output V; after the time T, controlling the fans which do not work to work so that the two fans output V; and alternating alternate work is realized.

In conclusion, due to the adoption of the technical scheme, the laboratory experiment and the numerical simulation are effectively combined. The mathematical model in the numerical simulation or the parameter setting in the mathematical model is verified through laboratory experiments, the mathematical model which can reflect real experimental data is selected, the condition of low numerical simulation accuracy caused by unreasonable selection of the mathematical model is effectively reduced, the reliability of the numerical simulation is enhanced, and a fully credible scientific reference is provided for the search of the fire smoke flowing rule.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart of the operation of the present invention.

FIG. 2 is a schematic view of the structure of the present invention.

FIG. 3 is a schematic diagram of a sensor module according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The invention provides a small-size fire smoke flow simulation experiment device which comprises a closed room shell 19 and a closed corridor shell 14 communicated with the room shell 19, wherein the closed corridor shell is shown in figures 1-3;

a spraying module fixed mounting seat for fixedly mounting a spraying module, a room sensor module fixed mounting seat for fixedly mounting a room sensor module 1 and a camera fixed mounting seat for fixedly mounting a camera are arranged at the top end of the room shell 19, the spraying module is fixedly mounted on the spraying module fixed mounting seat, the room sensor module 1 is fixedly mounted on the room sensor module fixed mounting seat, and the camera is fixedly mounted on the camera fixed mounting seat;

a temperature and humidity control module fixed mounting seat for fixedly mounting the temperature and humidity control module 10 and M corridor sensor module fixed mounting seats for fixedly mounting the corridor sensor module 1a are arranged at the top end of the corridor shell 14, wherein M is a positive integer greater than or equal to 1 and is respectively a 1 st corridor sensor module fixed mounting seat, a 2 nd corridor sensor module fixed mounting seat, a 3 rd corridor sensor module fixed mounting seat, … … and an M corridor sensor module fixed mounting seat, the 1 st corridor sensor module is fixedly mounted on the 1 st corridor sensor module fixed mounting seat, the 2 nd corridor sensor module is fixedly mounted on the 2 nd corridor sensor module fixed mounting seat, the 3 rd corridor sensor module is fixedly mounted on the 3 rd corridor sensor module fixed mounting seat, … …, the M th corridor sensor module is fixedly mounted on the M corridor sensor module fixed mounting seat, the temperature and humidity control module 10 is fixedly arranged on the temperature and humidity control module fixing mounting seat; a wind speed control module fixing mounting seat for fixedly mounting a wind speed control module 15 is arranged at the left side end of the corridor shell 14, and the wind speed control module 15 is fixedly mounted on the wind speed control module fixing mounting seat;

the spraying control data end of the spraying module is connected with the spraying data end of the analog-to-digital converter 12, the data end of the room sensor module 1 is connected with the room data end of the analog-to-digital converter 12, and the image data end of the camera is connected with the image data end of the computer 13; an analog data end of the temperature and humidity control module 10 is connected with a temperature and humidity analog data end of the analog-to-digital converter 12, a data end of a mth corridor sensor module is connected with a mth data end of a corridor of the analog-to-digital converter 12, M is a positive integer smaller than or equal to M, namely, the data end of the 1 st corridor sensor module is connected with the 1 st data end of the corridor of the analog-to-digital converter 12, the data end of the 2 nd corridor sensor module is connected with the 2 nd data end of the corridor of the analog-to-digital converter 12, the data end of the 3 rd corridor sensor module is connected with the 3 rd data end of the corridor of the analog-to-digital converter 12, … …, and the data end of the M-th corridor sensor module is connected with the Mth data end of the corridor of the analog-to-digital converter 12; the wind speed control data end of the wind speed control module 15 is connected with the wind speed data end of the analog-to-digital converter 12; the analog-to-digital converter 12 transmits the data to the computer 13. The numerical simulation uses the same physical model as the experimental device, and the numerical simulation mathematical model is adjusted through the data obtained by the experimental device so as to improve the accuracy.

In a preferred embodiment of the invention, the room housing 19 or/and the corridor housing 14 consists of transparent high-temperature-resistant glass plates;

or/and the glass plates forming the room shell 19 or/and the corridor shell 14 are bonded by a special organic glass adhesive, so that high air tightness is ensured on the premise of firmness.

In a preferred embodiment of the present invention, the left glass plate of the room casing 19 is formed of two parts, and is connected by a hinge so as to be detachable and openable to form the drain port 18; facilitating drainage of the standing water out of the room housing 19 in time. And carrying out meshing division on the fire simulation model in advance, wherein the meshes around the fire source are denser. The fire simulation model comprises: turbulence model, combustion model, thermal radiation model, smoke model. The measuring points are arranged in the numerical simulation and correspond to the positions of detecting heads of a temperature sensor, a humidity sensor, a wind speed sensor, a CO2 sensor and a smoke sensor in the small-size fire smoke flow simulation experiment device.

Or/and a burning dish 17 is fixedly arranged at the middle position of the bottom of the room shell 19, namely the position of the fire source.

In a preferred embodiment of the present invention, the room window 4 and the room housing 19 are connected by a window hinge 3, and can be detached and opened and closed; the air inlet is realized.

Or/and a door-shaped hole is formed between the room shell 19 and the corridor shell 14, and smoke can be communicated between the room shell 19 and the corridor shell 14.

In a preferred embodiment of the present invention, the wind speed controller module 15 includes K fans, where K is a positive integer greater than or equal to 2 and is the 1 st fan, the 2 nd fan, the 3 rd fan, … …, and the K th fan; a kth wind speed controller is arranged in the kth fan, and K is a positive integer less than or equal to K; the kth wind speed controller controls the kth fan to operate according to the wind speed control signal according to the received wind speed control signal;

the system also comprises a wind speed master controller, wherein the kth wind speed data end of the wind speed master controller is connected with the wind speed data end of the kth wind speed controller; the wind speed control data end of the wind speed master controller is connected with the wind speed data end of the analog-to-digital converter 12;

the wind speed master controller sends an operation control command to the K wind speed controllers according to the wind speed control data sent by the receiving computer 13, so that the fan-out air volume of K 'fans of the wind speed master controller is equivalent to the air volume at the last moment, and K' is a positive integer less than or equal to K.

In a preferred embodiment of the invention, the spraying module comprises a spray head 2, a water pump 7, a water tank 6, a pressure stabilizing tank 9 and a control box 8; the spray head 2 is fixedly arranged on the spray module fixed mounting seat, and the liquid inlet end of the spray head 2 is connected with the liquid outlet end of the water tank 6 through a pipeline 5;

the water pump 7 and the surge tank 9 are arranged on the pipeline 5, the control operation end of the water pump 7 is connected with the water pump control operation end of the control box 8, the pressure control end of the surge tank 9 is connected with the pressure control end of the control box 8, and the spray control data end of the control box 8 is connected with the spray data end of the analog-to-digital converter 12;

the control box 8 sends control commands to the water pump 7 and the pressure stabilizing tank 9 according to the spraying control data sent by the receiving computer 13, so that the spray head 2 sprays to the position of the fire source.

In a preferred embodiment of the present invention, the room sensor module 1 comprises a square casing, and one or any combination of a temperature sensor 20, a flue gas sensor 24, a CO2 sensor 25, a humidity sensor 21, a wind speed sensor 22 and a pressure sensor 22 is arranged in the square casing;

a fire monitoring and processing circuit board is further arranged in the square case, a fire monitoring controller is arranged on the fire monitoring and processing circuit board, a temperature data input end of the fire monitoring controller is connected with a temperature data output end of the temperature sensor 20, a smoke data input end of the fire monitoring controller is connected with a smoke data output end of the smoke sensor 24, a CO2 data input end of the fire monitoring controller is connected with a CO2 data output end of the CO2 sensor 25, a humidity data input end of the fire monitoring controller is connected with a humidity data output end of the humidity sensor 21, a wind speed data input end of the fire monitoring controller is connected with a wind speed data output end of the wind speed sensor 22, and a pressure data input end of the fire monitoring controller is connected with a pressure data output end of the pressure sensor 22; the data end of the fire monitoring controller is connected with the room data end of the analog-to-digital converter 12;

probes of the temperature sensor 20, the smoke sensor 24, the CO2 sensor 25, the humidity sensor 21, the wind speed sensor 22 and the pressure sensor 22 are arranged below the square case;

transmitting the temperature, smoke concentration, CO2 concentration, humidity, wind speed and pressure data measured by the temperature sensor, the smoke sensor, the CO2 sensor, the humidity sensor, the wind speed sensor and the pressure sensor to the computer 13;

or/and the mth corridor sensor module comprises an mth square machine box, wherein one or any combination of an mth corridor temperature sensor, an mth corridor flue gas sensor, an mth corridor CO2 sensor, an mth corridor humidity sensor, an mth corridor wind speed sensor and an mth corridor pressure sensor is arranged in the mth square machine box;

an mth corridor fire monitoring and processing circuit board is further arranged in the mth corridor square case, an mth corridor fire monitoring and processing controller is arranged on the mth corridor fire monitoring and processing circuit board, a temperature data input end of the mth corridor fire monitoring and processing controller is connected with a temperature data output end of the mth corridor temperature sensor, a smoke data input end of the mth corridor fire monitoring and processing controller is connected with a smoke data output end of the mth corridor smoke sensor, a CO2 data input end of the mth corridor fire monitoring and processing controller is connected with a CO2 data output end of the mth corridor CO2 sensor, a humidity data input end of the mth corridor fire monitoring and processing controller is connected with a humidity data output end of the mth corridor humidity sensor, a wind speed data input end of the mth corridor fire monitoring and processing controller is connected with a wind speed data output end of the mth corridor wind speed sensor, and a pressure data input end of the mth corridor fire monitoring and processing controller is connected with a pressure data output end of the mth corridor pressure sensor The output ends are connected; the data end of the mth corridor fire monitoring controller is connected with the mth corridor data end of the analog-to-digital converter;

probes of an mth corridor temperature sensor, an mth corridor flue gas sensor, an mth corridor CO2 sensor, an mth corridor humidity sensor, an mth corridor wind speed sensor and an mth corridor pressure sensor are arranged below the mth corridor square case;

the mth corridor temperature, mth corridor flue gas concentration, mth corridor CO2 concentration, mth corridor humidity, mth corridor wind speed and mth corridor pressure data measured by the mth corridor temperature sensor, the mth corridor flue gas sensor, the mth corridor CO2 sensor, the mth corridor humidity sensor, the mth corridor wind speed and the mth corridor pressure sensor are transmitted to the computer 13.

The invention also discloses a numerical simulation combination system method of the small-size fire smoke flow simulation experiment device, which comprises the following steps:

s1, opening the room window 4 on the room shell 19 of the small-size fire smoke flow simulation experiment device, and placing the substance to be burnt in the burning dish 17 at the bottom of the room shell 19; inputting fire source information in a numerical simulation system according to substances to be combusted, and selecting the type of the fire source;

s2, setting the type of a spray head, spray materials and spray pressure used in the small-size fire smoke flow simulation experiment device; setting the type, initial position, speed, diameter and spray pressure of a spray particle substance in a numerical simulation system according to an experimental device, and setting the number and position of particle sources to correspond to the number and position of spray nozzle orifices of a spray module in the experimental device;

s3, a temperature and humidity control module 10 and a wind speed control module 15 in the small-size fire smoke flow simulation experiment device are started and controlled through a computer 13, the room sensor module 1 and M corridor sensor modules are observed to input the temperature, humidity, wind speed, CO2 concentration and pressure curve changes on the computer 13, and when preset parameters are reached and a stable state is maintained, initial environment parameters are input into a numerical simulation system in the computer 13;

s4, selecting a proper mathematical model according to the material to be combusted and the initial environment parameters, wherein the selectable turbulence model comprises direct numerical simulation and large vortex simulation; the selectable combustion models comprise a PDF transport model, a vortex dissipation concept model, a vortex dissipation model and a vortex dissipation/finite rate model; the radiation model is set as a DO model, and the sub-relaxation coefficient of the radiation model can be selected to be 0.1-0.3; the selectable smoke models are a single-step model of Khan and greenes, a two-step model of Tesner, a Moss-Brooks model and a Moss-Brooks-Hall model;

s5, igniting the substance to be burnt and starting numerical simulation, observing and recording flame burning change and smoke flowing conditions in the small-size fire smoke flowing simulation experiment device, storing data of temperature, smoke concentration and CO2 concentration measured in the experiment and transmitting the data to the computer 13; the numerical simulation system outputs the change conditions of a temperature field and a smoke field during combustion and the data of the temperature, the smoke concentration and the CO2 concentration measured by each measuring point, wherein the data of each measuring point corresponds to the temperature sensor 20, the smoke sensor 24 and the CO2 sensor 25 in the small-size fire smoke flow simulation experiment device;

s6, the flame combustion and smoke flow conditions in the numerical simulation system can be known through the temperature field change and smoke field change in the numerical simulation system, and the flame combustion and smoke flow conditions are compared with those in the small-size fire smoke flow simulation experiment device; if the numerical value change difference is small and the flame combustion and flue gas flow laws are the same, the selected mathematical model is appropriate; if the numerical value changes greatly, the mathematical model is reselected; and (4) repeatedly simulating and comparing with a small-size fire smoke flow simulation experiment device until the numerical simulation error is reduced to an acceptable range.

In a preferred embodiment of the present invention, step S5 includes the following steps:

s51, acquiring a combustion picture shot by the camera, and recording the acquired combustion picture shot by the camera as a combustion image;

s52, performing image conversion processing on the combustion image Burn image to obtain a conversion processed image, wherein the method for obtaining the conversion processed image comprises:

judging the color chroma of the burning image:

if the Burn image is a color image, the following conversion is performed:

wherein the content of the first and second substances,indicating line lambda after conversionThe pixel value of the column pixel point, λ is less than or equal toIs a positive integer of (a) to (b), representing the total number of pixel points of each row in the burning image Burn image, and y representing the burning image Burn imaThe height value of ge, e represents the pixel resolution of the Burn image,the value is a positive integer less than or equal to sigma, wherein sigma is g × e, sigma represents the total number of pixels in each column in the combustion image Burn image, and g represents the width value of the combustion image Burn image;

wherein the content of the first and second substances,indicating the lambda line number in the combustion image Burn imageRed channel chroma of the column pixel points; a represents the adjustment coefficient of the chroma of the red channel;

indicating the lambda line number in the combustion image Burn imageGreen channel chroma of the column pixel; b represents the adjustment coefficient of the green channel chroma;

indicating the lambda line number in the combustion image Burn imageThe blue channel chroma of the column pixel points; c represents the adjustment coefficient of the chroma of the blue channel;

k (burn image) represents the converted image; the Convert image represents a conversion-processed image;

s53, performing flame feature extraction on the converted image Convert image obtained in the step S52 to obtain a flame image, wherein the flame image is obtained by performing flame image extraction on the converted image Convert image by using a contour line method;

s54, calculating the combustion range of the flame image, wherein the calculation method of the combustion range of the flame image is as follows:

wherein N is_τRepresenting the total number of pixels in the flame image frame, N_ζRepresents the total number of pixel points in the burning image Burn image, representing the total number of pixel points in each row in the burning image, sigma representing the total number of pixel points in each column in the burning image, y representing the height value of the burning image, g representing the width value of the burning image, mu representing the focal length proportionality coefficient, and mu belonging to (0, 1)]，S_tA combustion area indicating a combustion image Burn image captured at time t;

if S_t≤S₀，S₀Representing a preset first area threshold value of combustion, wherein the fire is a first-class fire at the moment; recording the burning time number of the first-level fire;

if S₀＜S_t≤S₁，S₁Representing a predetermined second area threshold of combustion, S₁Greater than a preset first area threshold S for combustion₀Then the fire is a second-level fire; recording the burning time number of the secondary fire;

if S_t＞S₂，S₂Representing a preset third area threshold of combustion, S₂Greater than a predetermined second area threshold S for combustion₁Then the fire is a third-class fire;recording the combustion time number of the three-level fire;

when the three-level fire burning duration is greater than or equal to the preset burning duration threshold, the spraying module works to reduce the fire condition.

In a preferred embodiment of the present invention, step S5 further includes the steps of controlling the K fans to operate in order to ensure that the fans introduce the smoke in the room housing 19 into the corridor housing 14:

s81, judging the number of fans which can not work, and recording the number as A, wherein A is a positive integer less than K; if A is greater than or equal to K, the fan needs to be replaced to carry out the experiment;

s82, acquiring an air volume value V to be output, wherein the air volume value V is measured by an air velocity sensor, and if K-A is 1, controlling a fan capable of working to work to output V;

if K-A is 2, controlling one fan capable of working to work to make the fan output V; after the time T, controlling the other fan capable of working to work to output V; realizing alternate work;

if K-A is equal to L, and L is greater than or equal to 3 and less than or equal to K, controlling two fans which can work to output V; after the time T, controlling the fans which do not work to work so that the two fans output V; and alternating alternate work is realized.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.