阅读说明：本技术 一种点燃实验模拟装置 (Ignition experiment simulation device ) 是由 雷佼 赵伟杰 张林鹤 刘乃安 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种点燃实验模拟装置,包括对流加热系统、辐射加热系统以及固体实验样本；对流加热系统包括气体管道、空气压缩机和对流加热器以及对流加热控制柜；气体管道的出口设有铂片、铂网和水冷套管；辐射加热系统包括红外加热模块和红外加热控制柜。上述装置包括对流加热系统、辐射加热系统、对流加热控制柜和红外加热控制柜,能够相对独立地调节对流加热系统和辐射加热系统对固体实验样本所施加的对流加热热流值和辐射热通量值,以实现对辐射热通量和对流加热热流的精准控制；且在气体管道的出口设置铂片、铂网和水冷套管,以使出口端成为低辐射管道,进而能够更灵活地调控装置所提供的总热通量中辐射热通量与对流加热热流的相对比例。(The invention discloses a lighting experiment simulation device, which comprises a convection heating system, a radiation heating system and a solid experiment sample; the convection heating system comprises a gas pipeline, an air compressor, a convection heater and a convection heating control cabinet; the outlet of the gas pipeline is provided with a platinum sheet, a platinum net and a water-cooling sleeve; the radiant heating system comprises an infrared heating module and an infrared heating control cabinet. The device comprises a convection heating system, a radiation heating system, a convection heating control cabinet and an infrared heating control cabinet, and can relatively independently adjust a convection heating heat flow value and a radiation heat flux value which are applied to a solid experimental sample by the convection heating system and the radiation heating system so as to realize accurate control of the radiation heat flux and the convection heating heat flow; and a platinum sheet, a platinum net and a water-cooling sleeve are arranged at the outlet of the gas pipeline, so that the outlet end becomes a low-radiation pipeline, and the relative proportion of radiation heat flux and convection heating heat flux in the total heat flux provided by the device can be more flexibly regulated and controlled.)

1. An ignition experiment simulation device is characterized by comprising a convection heating system, a radiation heating system and a solid experiment sample;

the convection heating system comprises a gas pipeline (1), an air compressor (2) and a convection heater (3) which are arranged at the inlet of the gas pipeline (1), and a convection heating control cabinet (4) for controlling the convection heater (3); the inner circumferential surface of the outlet of the gas pipeline (1) is provided with a platinum sheet (5), the outer circumferential surface is wrapped with a water-cooling sleeve (6), and the inner wall is provided with a platinum net (7) which can lead gas to pass through; the gas in the gas pipeline (1) is a mixture of oxygen and nitrogen or air;

the solid experimental sample is arranged above the outlet of the gas pipeline (1);

the radiant heating system comprises an infrared heating module (8) arranged at an outlet of the gas pipeline (1) and an infrared heating control cabinet (9) used for controlling the infrared heating module (8).

2. An ignition experiment simulation apparatus according to claim 1, wherein a freeze dryer (10), a pressure reducing valve (11) and a gas mass flow controller (12) are further provided between the air compressor (2) and the convection heater (3).

3. The ignition experiment simulation device according to claim 1, further comprising a pipe bracket (13) for fixing the gas pipe (1), wherein the outer circumferential surface of the gas pipe (1) is wrapped with a thermal insulation material (14).

4. An ignition experiment simulation apparatus according to claim 3, further comprising a module holder (15) for fixing the infrared heating module (8), the module holder (15) being fixed to the outlet of the gas pipe (1) through the pipe holder (13).

5. An ignition experiment simulation apparatus according to claim 1, further comprising a lifting table (16) for supporting the convection heater (3);

the convection heater (3) is connected with the gas pipeline (1) through a flange (17).

6. A fire experiment simulation apparatus according to claim 1, further comprising a measurement control system, the measurement control system comprising: a high precision electronic balance (18) for testing the mass loss rate of the solid test sample; a DV camera (19) for shooting the ignition process of the solid experimental sample; a hot wire anemometer (20) for measuring the gas flow velocity at the outlet of the gas duct (1); the thermocouple (21), the high-speed thermal infrared imager (22), the radiant heat flow meter (23), the total heat flow meter (24) and the gas analysis system are arranged at the outlet of the gas pipeline (1);

the system also comprises a data processing device which is in communication connection with the hot wire anemometer (20), the thermocouple (21), the radiant heat flow meter (23) and the total heat flow meter (24).

7. An ignition experiment simulation apparatus according to claim 6, wherein the gas analysis system comprises a gas collection hood (25) provided at the outlet of the gas duct (1), a blower (26) in communication with the gas collection hood (25), and a gas analyzer (27) for measuring the content of carbon dioxide, carbon monoxide, oxygen and water vapor in the gas.

8. A burning experiment simulation device according to claim 6, characterized by further comprising a first mount (28) for fixing the DV camera (19), a second mount (29) for fixing the high-speed thermal infrared imager (22) and a sample support frame (30) for supporting the solid experimental sample.

9. An ignition experiment simulation device according to claim 1, wherein the temperature of the gas in the gas pipe (1) is in the range of 25-850 ℃, the flow rate is in the range of 0-10m/s, and the oxygen concentration is in the range of 0-40%.

10. An ignition experiment simulation apparatus according to claim 1, wherein the radiant heat flux of the radiant heating system is in the range of 0-70kW/m²。

Technical Field

The invention relates to the technical field of material ignition, in particular to an ignition experiment simulation device.

Background

Forest fires are one of eight natural disasters in the world, and the history case of serious fires shows that the situation of forest-town boundary area fires (hereinafter referred to as boundary area fires) in all countries including China is increasingly severe. The mixed distribution of buildings and vegetations in the boundary area, the combustible distribution and the geographic environment are very complex, and the serious consequences are more easily caused when a fire disaster occurs. Fire spread is the process by which the flame preheats the fuel ahead and ignites it continuously. The combustible pyrolysis and ignition are the initial stage of solid fire occurrence and are important for the spread and development of boundary area fire. In a real fire spreading scene, the crown fine fuel in a boundary region has a sudden change from combustible burning to non-combustible burning, which is a phenomenon that the current fire spreading semi-empirical model cannot explain. Furthermore, fire spread models fail to provide a more effective management scheme based on a basic understanding of the fire spread process. Experimental and theoretical methods have been employed to improve understanding of the fire-spreading process, particularly the ignition behavior of shrub and tree-top fuels (fine fuels), has become the focus of current research.

Three heat transfer modes of convection heating, radiation heating and convection cooling mainly exist in the fire spreading process. The mechanisms of radiation ignition and convection ignition are different; at the present stage, great controversy exists in the mechanism of the dominant heating of fine fuel and the ignition phenomenon of shrub crown fuel. To establish a physical basis capable of reliably estimating the possibility of a fire (crown fire) occurring in shrubs and tree canopies, it is indispensable to conduct experimental research on ignition of fuel. Due to uncertainty of a leading heating mechanism, ignition experimental research is carried out by predecessors under the radiation heating condition or the convection heating condition, but the existing device cannot simultaneously realize independent control of radiation heat flux and convection heat heating heat flux; in addition, the conventional high-emissivity material is used in the convection section of the conventional convection heating device, and no measures are taken to reduce the background radiation value of the convection heating device, so that the research on the correlation between the ignition characteristic parameters and the convection heating change has a non-negligible influence. In addition, the size of the outlet end of the conventional convection device and the airflow flow rate are small, which brings great limitation to the selection of the size of an experimental sample and the experimental working condition. Namely, the existing device can not simultaneously realize the fine control of the radiant heat flux and the convection heating heat flux and can not relatively independently adjust the ratio of the convection heating heat flux and the radiant heat flux in the total heating heat flux; in addition, the existing convection heating device has a higher background radiation value and a lower upper limit of airflow speed, and cannot cover the parameter range in a real forest fire scene.

Therefore, how to relatively independently control the radiant heat flux and the convection heating heat flux is a difficult problem to be solved in the field at the present stage.

Disclosure of Invention

In view of this, the present invention provides an ignition experiment simulation apparatus, which can relatively independently control the radiant heat flux and the convection heating heat flux, and solve the problem in the field at the present stage.

An ignition experiment simulation device comprises a convection heating system, a radiation heating system and a solid experiment sample;

the convection heating system comprises a gas pipeline, an air compressor and a convection heater which are arranged at the inlet of the gas pipeline, and a convection heating control cabinet for controlling the convection heater; the inner peripheral surface of the gas pipeline outlet is provided with a platinum sheet, the outer peripheral surface is wrapped with a water-cooling sleeve, and the inner wall is provided with a platinum net which can enable gas to pass through; the gas in the gas pipeline is a mixture of oxygen and nitrogen;

the solid experimental sample is arranged above the outlet of the gas pipeline;

the radiant heating system comprises an infrared heating module arranged at the outlet of the gas pipeline and an infrared heating control cabinet used for controlling the infrared heating module.

Preferably, a freezing dryer, a pressure reducing valve and a gas mass flow controller are further arranged between the air compressor and the convection heater of the ignition experiment simulation device.

Preferably, the ignition experiment simulation device further comprises a pipeline bracket for fixing the gas pipeline, and the outer peripheral surface of the gas pipeline is wrapped with a heat insulation material.

Preferably, the ignition experiment simulation device further comprises a module support for fixing the infrared heating module, and the module support is fixed to the outlet of the gas pipeline through the pipeline support.

Preferably, the ignition experiment simulation device further comprises a lifting platform for supporting the convection heater;

the convection heater is connected with the gas pipeline through a flange.

Preferably, the ignition experiment simulation device further comprises a measurement control system, and the measurement control system comprises: a high precision electronic balance for testing the mass loss rate of the solid test sample; a DV camera for shooting the ignition process of the solid experimental sample; a hot wire anemometer for measuring a gas flow velocity at an outlet of the gas duct; the thermocouple, the high-speed thermal infrared imager, the radiant heat flow meter, the total heat flow meter and the gas analysis system are arranged at the outlet of the gas pipeline;

the system also comprises a data processing device which is in communication connection with the hot wire anemometer, the thermocouple, the radiant heat flow meter and the total heat flow meter.

Preferably, the ignition experiment simulation device comprises a gas collecting hood arranged at the outlet of the gas pipeline, a blower communicated with the gas collecting hood and a gas analyzer for measuring the content of carbon dioxide, carbon monoxide, oxygen and water vapor in the gas.

Preferably, the ignition experiment simulation device further comprises a first fixing frame for fixing the DV camera, a second fixing frame for fixing the high-speed thermal infrared imager, and a sample support frame for supporting the solid experiment sample.

Preferably, in the ignition experiment simulation device, the temperature range of the gas in the gas pipeline is 25-850 ℃, the flow speed range is 0-10m/s, and the oxygen concentration range is 0-40%.

Preferably, the ignition experiment simulation device is used for simulating the ignition experiment, and the radiant heat flux of the radiant heating system ranges from 0kW/m to 70kW/m²。

The invention provides an ignition experiment simulation device, which comprises a convection heating system, a radiation heating system and a solid experiment sample; the convection heating system comprises a gas pipeline, an air compressor and a convection heater which are arranged at the inlet of the gas pipeline, and a convection heating control cabinet for controlling the convection heater; the inner peripheral surface of the gas pipeline outlet is provided with a platinum sheet, the outer peripheral surface is wrapped with a water-cooling sleeve, and the inner wall is provided with a platinum net which can lead air to pass through; the gas in the gas pipeline is a mixture of oxygen and nitrogen; the solid experimental sample is arranged above the outlet of the gas pipeline; the radiant heating system comprises an infrared heating module arranged at the outlet of the gas pipeline and an infrared heating control cabinet used for controlling the infrared heating module. The ignition experiment simulation device comprises a convection heating system and a radiation heating system, and is provided with a convection heating control cabinet and an infrared heating control cabinet, and the convection heating heat flow value and the radiation heat flow value applied to the solid experiment sample by the convection heating system and the radiation heating system can be relatively and independently adjusted so as to realize accurate control of the radiation heat flow and the convection heating heat flow; and a platinum sheet, a platinum net and a water-cooling sleeve are arranged at the outlet of the gas pipeline, so that the outlet end becomes a low-radiation pipeline, and the relative proportion of radiation heat flux and convection heating heat flux in the total heat flux provided by the device can be more flexibly regulated and controlled. Therefore, the ignition experiment simulation device provided by the invention can relatively independently realize the control of the radiant heat flux and the convection heating heat flux, and solves the problem in the field at the present stage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a simulation apparatus for an ignition experiment in an embodiment of the present invention;

FIG. 2 is a front view of a convection heating system in an embodiment of the present invention;

FIG. 3 is a perspective view of a gas conduit according to an embodiment of the present invention;

FIG. 4 is a top view of the outlet of a gas conduit in an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the outlet of a gas line in an embodiment of the present invention;

FIG. 6 is a schematic view of a radiant heating system in accordance with an embodiment of the present invention.

In fig. 1-6:

a gas line-1; an air compressor-2; a convection heater-3; a convection heating control cabinet-4; 5, a platinum sheet; a water-cooled sleeve-6; platinum mesh-7; an infrared heating module-8; an infrared heating control cabinet-9; a freeze dryer-10; a pressure reducing valve-11; a gas mass flow controller-12; a pipe support-13; insulation-14; a module support-15; a lifting platform-16; a flange-17; high-precision electronic balance-18; DV camera-19; a hot wire anemometer-20; thermocouple-21; a high-speed thermal infrared imager-22; a radiant heat flux meter-23; a total heat flow meter-24; a gas-collecting hood-25; a blower-26; a gas analyzer-27; a first holder-28; a second holder-29; a sample holder-30; a holder-31; a perforated steel plate-32; balance support-33.

Detailed Description

The core of the specific embodiment is to provide an ignition experiment simulation device, which can relatively independently realize the control of radiant heat flux and convection heating heat flux, and solve the problem in the field at the present stage.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.

The ignition experiment simulation device provided by the specific embodiment comprises a convection heating system, a radiation heating system and a solid experiment sample; the convection heating system comprises a gas pipeline 1, an air compressor 2 and a convection heater 3 which are arranged at the inlet of the gas pipeline 1, and a convection heating control cabinet 4 for controlling the convection heater 3; the inner peripheral surface of the outlet of the gas pipeline 1 is provided with a platinum sheet 5, the outer peripheral surface is wrapped with a water-cooling sleeve 6, and the inner wall is provided with a platinum net 7 which can lead air to pass through; the gas in the gas pipeline 1 is a mixture of oxygen and nitrogen; the solid experimental sample is arranged above the outlet of the gas pipeline 1; the radiant heating system comprises an infrared heating module 8 arranged at the outlet of the gas pipeline 1 and an infrared heating control cabinet 9 used for controlling the infrared heating module 8.

The ignition experiment simulation device comprises a convection heating system and a radiation heating system, and is provided with a convection heating control cabinet 4 and an infrared heating control cabinet 9, and the convection heating heat flow value and the radiation heat flux value applied to the solid experiment sample by the convection heating system and the radiation heating system can be relatively independently adjusted, so that the radiation heat flux and the convection heating heat flow can be accurately controlled; and the outlet of the gas pipeline 1 is provided with a platinum sheet 5, a platinum net 7 and a water-cooling sleeve 6, so that the outlet end becomes a low-radiation pipeline, and the relative proportion of radiation heat flux and convection heating heat flux in the total heat flux provided by the device can be more flexibly regulated and controlled.

Therefore, the ignition experiment simulation device provided by the invention can relatively independently realize the control of the radiant heat flux and the convection heating heat flux, and solves the problem in the field at the present stage. Please refer to fig. 1-6.

The number of the infrared heating modules 8 can be four, the size of the external shape can be 350 mm-150 mm, and the total heating power can be 20 kW; of course, other types may be used which can perform the same function.

The infrared heating module 8 can be composed of an infrared radiator, a water cooling structure, an air cooling structure, a radiator mounting and fixing device, an infrared module frame, a sealing plate, a fixed connecting structure and the like; and the infrared heating module 8 may face toward the center and maintain a state of being radiation-heated obliquely upward by the module support 15, and may be disposed on the top of the pipe support 13 by the module support 15.

The ignition experiment simulation device provided by the specific embodiment can also be provided with a freezing type dryer 10, a pressure reducing valve 11 and a gas mass flow controller 12 between the air compressor 2 and the convection heater 3, so that various parameters of gas in the gas pipeline 1 can be better controlled, and further the convection heating heat flow can be accurately controlled.

Further, the ignition experiment simulation device can further comprise a pipeline bracket 13 for fixing the gas pipeline 1, so that the gas pipeline 1 is prevented from shaking and the like in the experiment process, and the smooth operation of the experiment is ensured; and the peripheral surface of the gas pipeline 1 can be wrapped with a heat insulation material 14, so that the temperature of the gas in the gas pipeline 1 can be better controlled, the heat loss of high-temperature hot gas flow flowing through the pipeline is reduced, and the influence of wall surface cooling on the heat uniformity of outlet gas flow is reduced.

The gas pipeline 1 can be fixed with the pipeline bracket 13 through the fixer 31 and the perforated steel plate 32, and the number of the fixer 31 and the perforated steel plate 32 can be designed according to actual requirements; for example, the retainer 31 may be wrapped around the outer circumferential surface of the gas duct 1 and fixed to the duct support 13 by being fixed to the perforated steel plate 32. See fig. 1-3 for details.

Preferably, the gas pipeline 1 may be a 316 stainless steel pipeline, and the gas pipeline 1 may include a vertical horizontal section and a vertical section, and gas enters the gas pipeline 1 from the horizontal section and flows out of the gas pipeline 1 from the vertical section; for example, the horizontal and vertical sections may each be 500mm in length, and the radius of the elbow bend to which they are connected may be 229 mm.

Of course, in the actual design, the material, size and style of the gas pipeline 1 can be designed according to the actual requirement.

The ignition experiment simulation device provided by the present embodiment may further include a module support 15 for fixing the infrared heating module 8, where the module support 15 may be fixed to the outlet of the gas pipeline 1 through the pipeline support 13, that is, the module support 15 may be fixed to the top of the pipeline support 13, and the specific positions are shown in fig. 1 to 6.

The ignition experiment simulation device provided by the present embodiment may further include a lifting table 16 for supporting the convection heater 3; the convection heater 3 can be connected to the gas pipe 1 via a flange 17; that is, the elevating platform 16 is used to support and adjust the height of the convection heater 3 so that the central axis of the convection heater 3 can be located at the same level as the central axis of the flange 17.

The flange 17 can be a welding flange 17, the diameter of the flange 17 can be 275mm, and eight holes with the diameter of 23mm are uniformly formed at the radius of 120mm from the center of the circle for fixing screws.

The ignition experiment simulation device provided by this embodiment may further include a measurement control system, and the measurement control system may include: a high precision electronic balance 18 for testing the mass loss rate of the solid test specimen; a DV camera 19 for photographing the ignition process of the solid experimental sample; a hot wire anemometer 20 for measuring a gas flow rate at an outlet of the gas pipe 1; a thermocouple 21 arranged at the outlet of the gas pipeline 1, a high-speed thermal infrared imager 22 for shooting the ignition process of the solid experimental sample, a radiant heat flow meter 23, a total heat flow meter 24 and a gas analysis system; a data processing device connected in communication with each of the hot-wire anemometer 20, the thermocouple 21, the bolometer 23 and the total bolometer 24 may be further included, so that the measurement data of each of the hot-wire anemometer 20, the thermocouple 21, the bolometer 23 and the total bolometer 24 can be transmitted to the data processing device.

The data processing device mainly stores and records relevant measurement parameters and adopts relevant software to analyze data according to subsequent requirements.

Wherein, the hot wire anemometer 20 can realize horizontal movement and vertical movement, and then can make it the same with the position that the sample support frame 30 is located through adjusting the position of the hot wire anemometer 20 to better measure and simulate the ignition experiment.

The existence of the measurement control system can better detect and analyze the gas, and further obtain various parameters in the ignition process so as to research the ignition process of the solid experimental sample.

Further, the gas analysis system may include a gas hood 25 disposed at the outlet of the gas pipeline 1, a blower 26 communicated with the gas hood 25, and a gas analyzer 27 for measuring the content of carbon dioxide, carbon monoxide, oxygen, and water vapor in the gas; and the composition of the ignited gas can be better analyzed.

For example, the gas analyzer 27 may detect carbon dioxide in the range of 0 to 60000ppm and carbon monoxide in the range of 0 to 5000 ppm; the oxygen measurement range may be 0-100%; the measurement range of water can be from 0 to 60 mmol/mol; in actual design, the kind of the gas analyzer 27 may be selected according to actual needs.

The ignition experiment simulation device provided by the present embodiment may further include a first fixing frame 28 for fixing the DV camera 19, a second fixing frame 29 for fixing the high-speed thermal infrared imager 22, and a sample support frame 30 for supporting a solid experiment sample. Sample support 30 may be placed on high precision electronic balance 18 and high precision electronic balance 18 may be placed on top of balance support 33 on the outer circumference of pipe rack 13.

Further, the first fixing frame 28 and the second fixing frame 29 can be designed to realize angle adjustment, so as to adjust the angles of the DV camera 19 and the high-speed thermal infrared imager 22, so as to better realize shooting of the ignition process of the solid experimental sample.

In the ignition experiment simulation device provided by the embodiment, the temperature range of the gas in the gas pipeline 1 can be 25-850 ℃, the flow rate range can be 0-10m/s, and the oxygen concentration range can be 0-40%; furthermore, the convection heater can realize amplitude adjustment at 1 ℃ so as to more accurately control the temperature of the gas; and the regulation range of the radiant heat flux of the radiant heating system can be 0-70kW/m²The variable range can better cover the parameter range in a real forest fire scene, and further the mechanisms of radiation ignition and convection ignition can be respectively researched.

It should be noted that the oxygen content in the gas is in the range of 0-40%, when the above ignition experiment simulation apparatus works, the air compressor 2 introduces air into the gas pipeline 1, and the oxygen content in the gas is adjusted by the nitrogen gas cylinder and the oxygen gas cylinder.

In the specific embodiment, the device model selection is mainly determined by parameters, so that the convection flow rate reaches 10m/s, and the specific implementation process is as follows:

first, the maximum volumetric flow of gas (liters per minute — SLM) required to achieve this flow rate is calculated based on the upper desired outlet gas flow rate limit.

And then the air compressor 2 is selected according to the maximum air volume flow, and the air compressor 2 capable of providing the maximum flow is selected.

And the corresponding convection heater 3 is determined and selected according to the flow range, and the airflow at the outlet of the convection heater 3 can be heated to the highest upper limit of the temperature under the maximum gas flow range according to the basic parameter curve of the convection heater 3.

It should be noted that the control of the temperature of the convection heater 3 and the control of the flow rate of the air compressor 2 are realized by respective controllers.

Compared with the existing convection radiation heating experimental device, the ignition experimental simulation device provided by the embodiment combines the convection heating system and the radiation heating system together, and the two systems can be used independently.

Meanwhile, the outlet section of the gas pipeline 1 reduces the background radiation value generated at the outlet end of the pipeline by using platinum with low emissivity, so that the background radiation value generated by the convection device can be relatively ignored when convection heating heat flow is applied, and further the radiation heating and the convection heating can be relatively independently provided, so that the radiation and the convection heating heat flow can be accurately controlled, the relative proportion of the radiation heat flow and the convection heating heat flow in the total heat flow provided by the device can be more flexibly regulated and controlled in experimental research, and further the experimental research of a larger variable range can be carried out.

Further, infrared heating module 8 can adjust the angle of applying the radiation to the solid experiment sample, and convection heater 3 can control the temperature of heating gas comparatively accurately, and then can make the inside comparatively quick stable high temperature air current that obtains of gas pipeline 1.

The gas temperature can be controlled between 25 ℃ and 850 ℃; the maximum air flow velocity can reach 10 m/s; spokeThe heat emission flux can be 0-70kW/m²The range can be set arbitrarily, so that the precise control of radiant and convection heating heat flow and environmental atmosphere is realized, the experimental observation and the fine measurement of the ignition characteristic of the solid combustible under the complex thermal environment condition are carried out, and the ignition mechanism of forest fire spreading fuel is deeply disclosed; in addition, the gas in the gas pipe 1 in the device can flow out more uniformly at the outlet end. And the solid experimental sample can move from the unheated zone to the convection radiation heated zone within a short time, so that the extra heat flow received by the sample in the moving process without experiment in the experiment can be reduced, and the accuracy of experimental phenomena and data is obviously improved.

The ignition experiment simulation device comprises a convection heating system and a radiation heating system, and is provided with a convection heating control cabinet 4 and an infrared heating control cabinet 9, and the convection heating heat flow value and the radiation heat flux value applied to the solid experiment sample by the convection heating system and the radiation heating system can be relatively independently adjusted, so that the radiation heat flux and the convection heating heat flow can be accurately controlled; and the outlet of the gas pipeline 1 is provided with a platinum sheet 5, a platinum net 7 and a water-cooling sleeve 6, so that the outlet end becomes a low-radiation pipeline, and the relative proportion of radiation heat flux and convection heating heat flux in the total heat flux provided by the device can be more flexibly regulated and controlled. Please refer to fig. 1-6.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.