A test system and method for hydrogen jet fire impacting a barrier wall

Abstract

The present invention discloses a test system and method for a hydrogen jet fire hitting a barrier wall, and relates to the technical field of hydrogen jet flame characteristic test, wherein a hydrogen jet module forms a hydrogen jet; an ignition module ignites the hydrogen jet to form a hydrogen jet fire for hitting the barrier wall; a barrier wall support module is used to place the barrier wall and adjust the inclination angle of the barrier wall; a barrier wall extension module is connected to the barrier wall support module and is also used to place the barrier wall to form an extension of the barrier wall; a data acquisition module includes an image acquisition submodule, a temperature acquisition submodule and a heat flow acquisition submodule, which are used to record the flame image of the hydrogen jet fire hitting the barrier wall, and to collect the surface temperature and rear heat flow of the barrier wall. The present invention can simulate hydrogen leakage causing a hydrogen jet fire to hit a wall surface, and use the data acquisition module to record the flame image, wall surface temperature and rear heat flow of the wall in real time, so as to study the flame characteristics after the hydrogen jet fire collides with the barrier wall, which has important practical significance for guiding the safe use of hydrogen energy.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen jet flame characteristic testing, in particular to a testing system and method for hydrogen jet fire impacting a barrier wall. Background Art

[0002] Hydrogen has the advantages of high energy density per unit mass, wide sources and no pollution, and has gradually become an important component of the modern energy structure. However, hydrogen has the characteristics of high diffusion rate, wide combustion limit range, low ignition energy and high laminar combustion rate, which makes it easy to leak, and after being accidentally ignited, it will form a hydrogen jet fire that is extremely harmful. When the hydrogen jet flame directly contacts the surface of equipment or buildings, more serious disasters may occur.

[0003] Therefore, it is of great significance to prevent and control hydrogen jet fire accidents by conducting collision experiments between hydrogen jet fire and wall, studying the influence of wall on hydrogen jet fire, and revealing the spreading law and heat transfer characteristics of hydrogen jet flame on wall. Summary of the invention

[0004] In order to overcome the above defects in the prior art, the present invention provides a test system for hydrogen jet fire impacting a barrier wall, which is used to study the flame characteristics after the hydrogen jet fire collides with the barrier wall.

[0005] To achieve the above object, the present invention adopts the following technical solutions, including:

[0006] A test system for a hydrogen jet fire impacting a barrier wall, comprising: a hydrogen jet module, an ignition module, a barrier wall support module, a barrier wall expansion module and a data acquisition module;

[0007] The hydrogen jet module is used to form a hydrogen jet;

[0008] The ignition module is used to ignite the hydrogen jet to form a hydrogen jet fire; the hydrogen jet fire is used to impact the barrier wall;

[0009] The barrier wall supporting module is used to place the barrier wall and adjust the inclination angle of the barrier wall;

[0010] The barrier wall extension module is connected to the barrier wall support module and is also used to place the barrier wall to form an extension of the barrier wall;

[0011] The data acquisition module includes an image acquisition submodule, a temperature acquisition submodule, and a heat flow acquisition submodule; the image acquisition submodule is used to record the flame image of the hydrogen jet fire hitting the barrier wall; the temperature acquisition submodule is used to acquire the surface temperature of the barrier wall; and the heat flow acquisition submodule is used to acquire the heat flow behind the barrier wall.

[0012] Preferably, the barrier wall support module comprises: a bottom plate, a card slot, a support plate rotating portion, a support plate, a connecting rod rotating portion, a connecting rod, a card block and a cylindrical hole;

[0013] The bottom plate is placed horizontally on the ground, and the bottom plate is connected to the support plate through the support plate rotating part, and the inclination angle of the support plate is changed by rotating the support plate rotating part; the support plate is connected to one end of the connecting rod through the connecting rod rotating part, and the clamping block on the other end of the connecting rod is used to be clamped into the clamping slot of different gears on the bottom plate to lock the inclination angle of the support plate;

[0014] The support plate is used to place the barrier wall, and the inclination angle of the barrier wall is adjusted by changing the inclination angle of the support plate;

[0015] The support plate is provided with a cylindrical hole for connecting the barrier wall expansion module.

[0016] Preferably, the barrier wall extension module comprises a side wall extension submodule, and the side wall extension submodule comprises a side wall fixing column, a side wall rotating part, a side wall rotating rod and a side wall supporting plate;

[0017] The side wall extension submodule is fixed by inserting the side wall fixing column into the cylindrical hole on the support plate. The side wall fixing column is connected to the side wall rotating rod through the side wall rotating part. The side wall support plate is connected to the side wall rotating rod. The side wall supporting plate is driven to rotate by the side wall rotating part and the side wall rotating rod to change the angle between the side wall support plate and the support plate. The side wall support plate is used to place the obstacle wall.

[0018] Preferably, the barrier wall extension module further comprises a second-layer wall extension submodule, wherein the second-layer wall extension submodule comprises a second-layer wall fixing column, a second-layer wall connecting rod and a second-layer wall supporting plate;

[0019] The second-layer wall extension submodule is fixed by inserting the second-layer wall fixing column into the cylindrical hole on the support plate. The second-layer wall fixing column is connected to the second-layer wall support plate through the second-layer wall connecting rod, so that the second-layer wall support plate is located above the support plate and parallel to the support plate; the second-layer wall support plate is used to place the obstacle wall.

[0020] Preferably, a thermocouple holder is also provided on the support plate for placing the barrier wall; a small hole having the same diameter as the thermocouple is opened on the thermocouple holder for placing the thermocouple, and the thermocouple is used to collect the surface temperature of the barrier wall.

[0021] Preferably, the hydrogen jet module comprises: a hydrogen cylinder, a hydrogen cylinder pressure reducing valve, a mass flow meter, an explosion-proof bellows, a buffer tank, a lifting platform, a pressure sensor, a pressure display, a temperature sensor, a temperature display, a stainless steel pipe, an explosion-proof solenoid valve and a nozzle;

[0022] The gas supply end of the hydrogen cylinder is connected to the gas inlet of the buffer tank through an explosion-proof bellows; a hydrogen cylinder pressure reducing valve and a mass flow meter are sequentially arranged on the explosion-proof bellows along the hydrogen transmission direction;

[0023] The gas outlet of the buffer tank is connected to the nozzle through a stainless steel pipe; an explosion-proof solenoid valve is provided on the stainless steel pipe;

[0024] The buffer tank is provided with a pressure sensor and a temperature sensor, which are connected to the pressure display and the temperature display respectively;

[0025] The buffer tank is placed horizontally on a lifting platform. When the inclination angle of the barrier wall changes, the lifting platform is adjusted so that the center of the nozzle and the center of the barrier wall are at the same height, so that the hydrogen jet fire hits the center of the barrier wall.

[0026] Preferably, the image acquisition submodule includes a front camera and a side camera; the front camera is placed on the front of the barrier wall to record the front flame image; the side camera is placed on the side of the barrier wall to record the side flame image.

[0027] Preferably, the temperature acquisition submodule includes a plurality of thermocouples and a temperature acquisition unit;

[0028] The thermocouples are arranged on the back of the barrier wall or 1-3 cm away from the back of the barrier wall, and are spread out from the center of the barrier wall to the surrounding areas in a circular array; the thermocouples are connected to the temperature acquisition unit to collect temperature signals and convert them into digital signals.

[0029] Preferably, the heat flow collection submodule comprises a base, a telescopic rod, a guide rail, a slider, a heat flow sensor and a heat flow collection unit;

[0030] The base is connected to the guide rail through a telescopic rod, the slider moves on the guide rail, and the heat flow sensor is arranged on the slider. By changing the position of the slider, heat flow measurement at different positions and intervals can be achieved; the heat flow sensor is connected to the heat flow acquisition unit to collect heat flow signals and convert them into digital signals.

[0031] The present invention also provides a method for testing a hydrogen jet fire impacting a barrier wall, which is applicable to the above-mentioned test system for testing a hydrogen jet fire impacting a barrier wall, and the test method comprises the following steps:

[0032] S1, adjusting the barrier wall to a desired inclination angle through the barrier wall support module; according to the experimental purpose, forming an extension of the barrier wall through the barrier wall extension module;

[0033] S2, adjusting the hydrogen jet module and the heat flux acquisition submodule so that the center of the hydrogen jet fire, the center of the barrier wall, and the center of the heat flux sensor remain at the same height;

[0034] S3, according to the experimental purpose, outputting a hydrogen jet with a constant pressure or a hydrogen jet with a non-constant pressure through the hydrogen jet module;

[0035] S4, start the data acquisition module to record the flame image of the hydrogen jet fire hitting the barrier wall, the surface temperature of the barrier wall and the heat flow behind the barrier wall;

[0036] S5, the ignition module ignites the hydrogen jet to form a hydrogen jet fire, and hits the center of the barrier wall;

[0037] S6, the experiment ends and the hydrogen jet module is turned off.

[0038] The advantages of the present invention are:

[0039] (1) The hydrogen jet fire impact barrier wall test system proposed in the present invention can simulate the impact of a hydrogen leak-induced jet fire on a wall, and use a data acquisition module to record flame images, wall temperature, and heat flux behind the wall in real time, so as to study the flame characteristics after the hydrogen jet fire collides with the barrier wall, which has important practical significance for guiding the safe use of hydrogen energy.

[0040] (2) The barrier wall support module proposed in the present invention can freely adjust the angle, thereby realizing the hydrogen jet fire collision experiment under different wall inclination angles, which is helpful to further study the influence of the wall inclination angle on the flame characteristics of the hydrogen jet fire.

[0041] (3) The barrier wall expansion module proposed in the present invention can expand the research scope of the experiment, thereby realizing hydrogen jet fire collision experiments under various barrier wall structures, which is helpful to further study the influence of different barrier wall structures on the flame characteristics of hydrogen jet fire.

[0042] (4) The hydrogen jet module proposed in the present invention can not only realize the test research of hydrogen jet fire impacting barrier wall at constant pressure, but also realize the test research of hydrogen jet fire impacting barrier wall at non-constant pressure, providing more comprehensive data support and theoretical basis for the impact heat transfer of hydrogen jet fire.

[0043] (5) The hydrogen jet fire impact barrier wall test method proposed in the present invention is applied to the above-mentioned test system, and the technical effect produced is the same as the beneficial effect of the above-mentioned test system, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A structural diagram of a test system for hydrogen jet fire impacting a barrier wall.

[0045] Figure 2 This is a schematic diagram of the structure of the buffer tank.

[0046] Figure 3 Schematic diagram of the thermocouple arrangement.

[0047] Figure 4 Schematic diagram of the layout of the heat flow sensor.

[0048] Figure 5 It is a structural schematic diagram of the telescopic rod.

[0049] Figure 6 Schematic diagram of the structure of the barrier wall support module.

[0050] Figure 7 It is a schematic diagram of the side structure of a barrier wall support module equipped with a barrier wall.

[0051] Figure 8 It is a schematic diagram of the back structure of a barrier wall support module equipped with a barrier wall.

[0052] Fig. 9 Schematic diagram of the structure of the side wall extension submodule.

[0053] Fig.10 It is a structural schematic diagram of the second-layer wall extension submodule.

[0054] Fig.11 It is a schematic diagram of the structure equipped with a side wall extension submodule.

[0055] Fig.12 It is a schematic diagram of the structure equipped with a second-layer wall extension submodule.

[0056] Description of reference numerals:

[0057] 11-Hydrogen cylinder, 12-Hydrogen cylinder pressure reducing valve, 13-Mass flow meter, 14-Explosion-proof bellows, 15-Buffer tank, 151-First threaded hole, 152-Second threaded hole, 153-Left threaded hole, 154-Right threaded hole, 16-Lifting platform, 17-Pressure sensor, 18-Pressure display, 19-Temperature sensor, 110-Temperature display, 111-Stainless steel pipe, 112-Explosion-proof solenoid valve, 113-Nozzle, 21-Ignition electrode, 22-Pulse igniter, 31-Front camera, 32-Side camera, 33-Thermocouple, 34-Temperature acquisition module, 35-Computer, 36-Base, 37- Telescopic rod, 371-main rod, 372-secondary rod, 373-screw, 374-rod threaded hole, 38-guide rail, 39-slider, 310-heat flow sensor, 311-heat flow acquisition module, 41-bottom plate, 42-slot, 43-support plate rotating part, 44-support plate, 45-connecting rod rotating part, 46-connecting rod, 47-block, 48-thermocouple bracket, 49-obstacle wall, 410-cylindrical hole, 511-side wall fixing column, 512-side wall rotating part, 513-side wall rotating rod, 514-side wall support plate, 521-second layer wall fixing column, 522-second layer wall connecting rod, 523-second layer wall support plate. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Example 1

[0060] Depend on Figure 1 As shown, the present embodiment provides a test system for a hydrogen jet fire impacting a barrier wall, comprising: a hydrogen jet module for controlling hydrogen leakage to form a hydrogen jet, a data acquisition module for acquiring experimental data, an ignition module for igniting a hydrogen jet to form a hydrogen jet fire, a barrier wall support module for placing a barrier wall 49 (fireproof panel) and adjusting the inclination angle of the barrier wall 49, and a barrier wall extension module for extending the barrier wall 49.

[0061] Depend on Figure 1 As shown, the hydrogen jet module includes: a hydrogen cylinder 11, a hydrogen cylinder pressure reducing valve 12, a mass flow meter 13, an explosion-proof bellows 14, a buffer tank 15, a lifting platform 16, a pressure sensor 17, a pressure display 18, a temperature sensor 19, a temperature display 110, a stainless steel pipe 111, an explosion-proof solenoid valve 112, and a nozzle 113.

[0062] like Figure 2 As shown, a first threaded hole 151 and a second threaded hole 152 are provided on the top of the buffer tank 15, a left threaded hole 153 is provided on the left side of the buffer tank 15, and a right threaded hole 154 is provided on the right side of the buffer tank 15. The first threaded hole 151, the second threaded hole 152, the left threaded hole 153 and the right threaded hole 154 are used to connect external pipelines or install components, wherein the first threaded hole 151 is used to install the pressure sensor 17, the second threaded hole 152 is used to install the temperature sensor 19, the left threaded hole 153 is used as the air inlet of the buffer tank 15 to connect the external pipeline, and the right threaded hole 154 is used as the air outlet of the buffer tank 15 to connect the external pipeline. In this embodiment, the first threaded hole 151 and the second threaded hole 152 are four-inch branch threaded holes, and the left threaded hole 153 and the right threaded hole 154 are two-inch branch threaded holes.

[0063] The gas supply end of the hydrogen cylinder 11 is connected to the gas inlet (i.e., the left threaded hole 153) of the buffer tank 15 through an explosion-proof bellows 14. A hydrogen cylinder pressure reducing valve 12 and a mass flow meter 13 are sequentially arranged on the explosion-proof bellows 14 along the hydrogen transmission direction. Hydrogen flows out of the hydrogen cylinder 11 and enters the buffer tank 15 through the hydrogen cylinder pressure reducing valve 12 and the mass flow meter 13 in sequence. The mass flow meter 13 is used to adjust the hydrogen delivery amount.

[0064] like Figure 1 and Figure 2 As shown, the buffer tank 15 is horizontally placed on the lifting platform 16. When the inclination angle of the barrier wall 49 changes, the lifting platform 16 is adjusted to make the center of the nozzle 113 and the center of the barrier wall 49 at the same height.

[0065] The pressure sensor 17 is installed in the first threaded hole 151 above the buffer tank 15, and the pressure sensor 17 is connected to the pressure display 18 through a wire. The temperature sensor 19 is installed in the second threaded hole 152 above the buffer tank 15, and the temperature sensor 19 is connected to the pressure display 110 through a wire. The operator detects the pressure value and temperature value in the buffer tank 15 through the indications of the pressure display 18 and the temperature display 110.

[0066] The gas outlet of the buffer tank 15 (i.e., the right threaded hole 154) is connected to the nozzle 113 through a stainless steel pipe 111, and an explosion-proof solenoid valve 112 is provided on the stainless steel pipe 111. The explosion-proof solenoid valve 112 is a normally closed solenoid valve, and the hydrogen in the buffer tank 15 can be released by powering on. The stainless steel pipe 111 is threadedly connected to the nozzle 113 and the explosion-proof solenoid valve 112, and the thread size is a two-inch threaded pipe. Each connection is provided with a seal such as a round stainless steel gasket to prevent hydrogen leakage at the connection.

[0067] like Figure 1 As shown, the data acquisition module includes: an image acquisition submodule, a temperature acquisition submodule and a heat flow acquisition submodule. The image acquisition submodule is used to record the flame image of the hydrogen jet fire hitting the barrier wall 49; the temperature acquisition submodule is used to acquire the surface temperature of the barrier wall 49; and the heat flow acquisition submodule is used to acquire the rear heat flow of the barrier wall 49. Among them, the image acquisition submodule includes a front camera 31 and a side camera 32; the temperature acquisition submodule includes a thermocouple 33 and a temperature acquisition unit 34; and the heat flow acquisition submodule includes a base 36, a telescopic rod 37, a guide rail 38, a slider 39, a heat flow sensor 310 and a heat flow acquisition unit 311.

[0068] The front camera 31 is on the same side as the buffer tank 15 and faces the barrier wall 49 , and is used to record the front flame image; the side camera 32 is placed on the side of the barrier wall 49 , and is used to record the side flame image.

[0069] The thermocouple 33 is arranged as follows Figure 1 and Figure 3As shown, according to the diffusion characteristics of the hydrogen jet fire on the wall, a total of 25 thermocouples 33 are arranged in a circular array from the center of the barrier wall 49 to the surroundings at a distance of 1 cm from the back of the barrier wall 49, and each circle is spaced 10 cm apart. The thermocouple 33 is fixed by a thermocouple bracket 48 welded on the support plate, and the thermocouple 33 is connected to the temperature acquisition unit 34 through a wire. The temperature acquisition unit 34 converts the temperature signal into a digital signal and sends it to the computer 35 for display and recording.

[0070] The installation of the heat flow sensor 310 is as follows Figure 1 and Figure 4 As shown, the base 36 and the guide rail 38 are connected by a telescopic rod 37, the slider 39 can move freely on the guide rail 38, and the heat flow sensor 310 is set on the slider 39. By changing the position of the slider 39, the heat flow measurement of different positions and spacings can be achieved. The heat flow sensor 310 can also be set to other numbers according to the test requirements. The heat flow sensor 310 is connected to the heat flow acquisition unit 311 through a wire, and the heat flow acquisition unit 311 converts the heat flow signal into a digital signal and sends it to the computer 35 for display and recording.

[0071] The structure of the telescopic rod 37 is as follows Figure 5 As shown, it includes a main rod 371, a secondary rod 372, a screw 373 and a rod threaded hole 374. A plurality of rod threaded holes 374 are provided on the main rod 371 and the secondary rod 372. The height of the telescopic rod can be fixed by inserting the screw 373 into the rod threaded hole 374, so that the center of the heat flow sensor 310 and the center of the barrier wall 49 are at the same height.

[0072] like Figure 1 As shown, the ignition module includes an ignition electrode 21 and a pulse igniter 22, which are used to ignite the hydrogen jet to form a hydrogen jet fire.

[0073] like Figure 1 and Figure 6-8As shown, the barrier wall support module includes a bottom plate 41, a slot 42, a support plate rotating portion 43, a support plate 44, a connecting rod rotating portion 45, a connecting rod 46, a block 47, a thermocouple bracket 48, a barrier wall 49 and a cylindrical hole 410. The bottom plate 41 is placed horizontally on the ground, the support plate rotating portion 43 connects the bottom plate 41 and the support plate 44, and the tilt angle of the support plate 44 is changed by rotating the support plate rotating portion 43. The connecting rod rotating portion 45 connects the support plate 44 and the connecting rod 46. The block 47 on the connecting rod 46 can be inserted into the slot 42 of different gears on the bottom plate 41 to lock the tilt angle of the support plate 44. The thermocouple bracket 48 is welded on the support plate 44. A small hole with the same diameter as the thermocouple 33 is opened on the thermocouple bracket 48. After the thermocouple 33 is inserted into the small hole, it can be fixed with tools such as cable ties. The barrier wall 49 is fixed to the support plate 44 by a commercially available U-shaped clip, and the inclination angle of the barrier wall 49 is adjusted by changing the inclination angle of the support plate 44. A cylindrical hole 410 is provided on the support plate 44 for connecting the barrier wall expansion module.

[0074] The barrier wall extension module is connected to the barrier wall support module and is also used to place the barrier wall 49 to form an extension of the barrier wall 49. Figure 9-12 As shown, the barrier wall extension module includes: a side wall extension submodule and a second wall extension submodule.

[0075] like Fig. 9 and Fig.11 As shown, the side wall extension submodule includes a side wall fixing column 511, a side wall rotating portion 512, a side wall rotating rod 513 and a side wall support plate 514. The side wall rotating portion 512 connects the side wall fixing column 511 and the side wall rotating rod 513; the side wall support plate 514 is connected to the side wall rotating rod 513, and is used to place the barrier wall 49. The side wall extension submodule is fixed by inserting the side wall fixing column 511 into the cylindrical hole 410 on the support plate 44, and the side wall supporting plate 514 is driven to rotate by the side wall rotating portion 512 and the side wall rotating rod 513, so as to change the angle between the side wall support plate 514 and the support plate 44.

[0076] like Fig.10 and Fig.12 As shown, the second-layer wall extension submodule includes a second-layer wall fixing column 521, a second-layer wall connecting rod 522 and a second-layer wall support plate 523. The second-layer wall connecting rod 522 connects the second-layer wall fixing column 521 and the second-layer wall support plate 523, and the second-layer wall support plate 523 is used to place the barrier wall 49. The second-layer wall extension submodule is fixed by inserting the second-layer wall fixing column 521 into the cylindrical hole 410 on the support plate 44, so that the second-layer wall support plate 523 is located above the support plate 44 and parallel to the support plate 44.

[0077] The barrier walls 49 are fixed to the side wall support plates 514 and the second wall support plates 523 by commercially available U-shaped clips.

[0078] Example 2

[0079] This embodiment provides a method for testing a hydrogen jet fire impacting a barrier wall, which is applied to the test system for testing a hydrogen jet fire impacting a barrier wall in Embodiment 1. The test method includes the following steps:

[0080] S1, set the inclination angle between the barrier wall 49 and the ground, and adjust the support plate 44 to the desired inclination angle through the barrier wall support module. According to the experimental purpose, determine to use the side wall extension submodule and / or the second layer wall extension submodule, and accordingly insert the side wall fixing column 511 and / or the second layer wall fixing column 521 into the columnar hole 410 to form an extension of the barrier wall 49.

[0081] S2, adjust the lifting platform 16 and the telescopic rod 37 to ensure that the center of the nozzle 113, the center of the barrier wall 49 and the center of the heat flow sensor 310 are at the same height.

[0082] S3, according to the experimental purpose, output a hydrogen jet with a constant pressure or a hydrogen jet with a non-constant pressure through the hydrogen jet module; the details are as follows:

[0083] If an experiment of a hydrogen jet fire at a constant pressure hitting the barrier wall 49 is carried out, the hydrogen cylinder pressure reducing valve 12 is opened, and the gas mass flow rate required for the experiment is set through the gas mass flow meter 13 until the reading of the gas mass flow meter 13 and the pressure in the buffer tank 15 are stable;

[0084] If an experiment of a hydrogen jet fire with non-constant pressure impacting the barrier wall 49 is carried out, the hydrogen cylinder pressure reducing valve 12 is opened to allow hydrogen to enter the buffer tank 15 until the pressure in the buffer tank 15 reaches a set value and then the hydrogen cylinder pressure reducing valve 12 is closed.

[0085] S4, start the data acquisition module, including starting the front camera 31 and the side camera 32, and using the computer 35 to control the temperature acquisition unit 34 and the heat flow acquisition unit 311 to start recording.

[0086] S5, after the ignition electrode 21 is energized, the explosion-proof electromagnetic valve 112 is opened to release the hydrogen in the buffer tank 15, forming a stable hydrogen jet fire.

[0087] S6, this round of experiments ends, all valves are closed, and the experimental results are analyzed.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A test system for hydrogen jet fire impacting a barrier wall, characterized in that: include: Hydrogen jet module, ignition module, barrier wall support module, barrier wall extension module and data acquisition module; The hydrogen jet module is used to form a hydrogen jet; The ignition module is used to ignite the hydrogen jet to form a hydrogen jet fire; the hydrogen jet fire is used to impact the barrier wall (49); The barrier wall supporting module is used to place the barrier wall (49) and adjust the inclination angle of the barrier wall (49); The barrier wall extension module is connected to the barrier wall support module and is also used to place the barrier wall (49) to form an extension of the barrier wall (49); The data acquisition module comprises an image acquisition submodule, a temperature acquisition submodule, and a heat flow acquisition submodule; the image acquisition submodule is used to record a flame image of the hydrogen jet fire impacting the barrier wall (49); the temperature acquisition submodule is used to acquire the surface temperature of the barrier wall (49); The heat flow collection submodule is used to collect the heat flow behind the barrier wall (49); The barrier wall support module comprises: a bottom plate (41), a clamping slot (42), a support plate rotating portion (43), a support plate (44), a connecting rod rotating portion (45), a connecting rod (46), a clamping block (47) and a columnar hole (410); The bottom plate (41) is placed horizontally on the ground. The bottom plate (41) is connected to the support plate (44) via a support plate rotating portion (43). The tilt angle of the support plate (44) is changed by rotating the support plate rotating portion (43). The support plate (44) is connected to one end of a connecting rod (46) via a connecting rod rotating portion (45). The clamping block (47) on the other end of the connecting rod (46) is used to clamp into a clamping slot (42) of different gears on the bottom plate (41) to lock the tilt angle of the support plate (44). The support plate (44) is used to place the barrier wall (49), and the inclination angle of the barrier wall (49) is adjusted by changing the inclination angle of the support plate (44); The support plate (44) is provided with a cylindrical hole (410) for connecting the barrier wall expansion module; The barrier wall extension module comprises a side wall extension submodule, and the side wall extension submodule comprises a side wall fixing column (511), a side wall rotating portion (512), a side wall rotating rod (513) and a side wall supporting plate (514); The side wall extension submodule is fixed by inserting a side wall fixing column (511) into a columnar hole (410) on a support plate (44); the side wall fixing column (511) is connected to a side wall rotating rod (513) via a side wall rotating portion (512); a side wall support plate (514) is connected to the side wall rotating rod (513); the side wall supporting plate (514) is driven to rotate via the side wall rotating portion (512) and the side wall rotating rod (513), thereby changing the angle between the side wall supporting plate (514) and the support plate (44); the side wall support plate (514) is used to place an obstacle wall (49); The barrier wall extension module also includes a second-layer wall extension submodule, wherein the second-layer wall extension submodule includes a second-layer wall fixing column (521), a second-layer wall connecting rod (522) and a second-layer wall supporting plate (523); The second-layer wall extension submodule is fixed by inserting a second-layer wall fixing column (521) into a columnar hole (410) on a support plate (44); the second-layer wall fixing column (521) is connected to a second-layer wall support plate (523) via a second-layer wall connecting rod (522), so that the second-layer wall support plate (523) is located above the support plate (44) and parallel to the support plate (44); the second-layer wall support plate (523) is used to place an obstacle wall (49).

2. A test system for hydrogen jet fire impacting a barrier wall according to claim 1, characterized in that: A thermocouple bracket (48) is also provided on the support plate for placing the barrier wall (49); a small hole having the same diameter as the thermocouple (33) is opened on the thermocouple bracket (48) for placing the thermocouple (33); the thermocouple (33) is used to collect the surface temperature of the barrier wall (49).

3. A test system for hydrogen jet fire impacting a barrier wall according to claim 1, characterized in that: The hydrogen jet module comprises: a hydrogen cylinder (11), a hydrogen cylinder pressure reducing valve (12), a mass flow meter (13), an explosion-proof bellows (14), a buffer tank (15), a lifting platform (16), a pressure sensor (17), a pressure display (18), a temperature sensor (19), a temperature display (110), a stainless steel pipe (111), an explosion-proof solenoid valve (112) and a nozzle (113); The gas supply end of the hydrogen cylinder (11) is connected to the gas inlet of the buffer tank (15) via an explosion-proof bellows (14); a hydrogen cylinder pressure reducing valve (12) and a mass flow meter (13) are sequentially arranged on the explosion-proof bellows (14) along the hydrogen transmission direction; The gas outlet of the buffer tank (15) is connected to the nozzle (113) via a stainless steel pipe (111); an explosion-proof solenoid valve (112) is provided on the stainless steel pipe (111); The buffer tank (15) is provided with a pressure sensor (17) and a temperature sensor (19), which are respectively connected to the pressure display (18) and the temperature display (110); The buffer tank (15) is placed horizontally on a lifting platform (16). When the inclination angle of the barrier wall (49) changes, the lifting platform (16) is adjusted so that the center of the nozzle (113) and the center of the barrier wall (49) are at the same height, so that the hydrogen jet fire hits the center of the barrier wall (49).

4. A test system for hydrogen jet fire impacting a barrier wall according to claim 1, characterized in that: The image acquisition submodule comprises a front camera (31) and a side camera (32); the front camera (31) is placed on the front of the barrier wall (49) and is used to record the front flame image; the side camera (32) is placed on the side of the barrier wall (49) and is used to record the side flame image.

5. A test system for hydrogen jet fire impacting a barrier wall according to claim 1, characterized in that: The temperature acquisition submodule comprises a plurality of thermocouples (33) and a temperature acquisition unit (34); The thermocouples (33) are arranged on the back side of the barrier wall (49) or at a distance of 1 to 3 cm from the back side of the barrier wall (49), and are spread out from the center of the barrier wall (49) to the surrounding areas in a circular array arrangement; the thermocouples (33) are connected to a temperature collection unit (34) and are used to collect temperature signals and convert them into digital signals.

6. A test system for hydrogen jet fire impacting a barrier wall according to claim 1, characterized in that: The heat flow collection submodule comprises a base (36), a telescopic rod (37), a guide rail (38), a slider (39), a heat flow sensor (310) and a heat flow collection unit (311); The base (36) is connected to the guide rail (38) via a telescopic rod (37); the slider (39) moves on the guide rail (38); the heat flow sensor (310) is arranged on the slider (39); and heat flow measurement at different positions and intervals is achieved by changing the position of the slider (39); the heat flow sensor (310) is connected to a heat flow acquisition unit (311) and is used to acquire heat flow signals and convert them into digital signals.

7. A method for testing a hydrogen jet fire impacting a barrier wall, characterized in that: A test system for a hydrogen jet fire impacting a barrier wall according to any one of claims 1 to 6 is used, wherein the test method comprises the following steps: S1, adjusting the barrier wall (49) to a desired inclination angle through a barrier wall support module; and extending the barrier wall (49) through a barrier wall extension module according to the experimental purpose; S2, adjusting the hydrogen jet module and the heat flux collection submodule so that the center of the hydrogen jet fire, the center of the barrier wall (49), and the center of the heat flux sensor (310) are maintained at the same height; S3, according to the experimental purpose, outputting a hydrogen jet with a constant pressure or a hydrogen jet with a non-constant pressure through the hydrogen jet module; S4, starting a data acquisition module to record a flame image of the hydrogen jet fire impacting the barrier wall (49), a surface temperature of the barrier wall (49), and a heat flow behind the barrier wall (49); S5, the ignition module ignites the hydrogen jet to form a hydrogen jet fire, which hits the center of the barrier wall (49); S6, the experiment ends and the hydrogen jet module is turned off.

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