A flare igniter system layout for a combustion heater

Abstract

The present application belongs to the technical field of wind tunnel test, and discloses a torch igniter system layout for combustion heater. The torch igniter system is located near the combustion heater of a hypersonic high-temperature wind tunnel, and the torch igniter system layout for combustion heater is divided into three parts, namely, a torch igniter body, a fixed supply platform and a gantry supply platform. According to the flow direction, the fixed supply platform is located upstream, and the gantry supply platform is located downstream. A disassembly area is arranged between the fixed supply platform and the gantry supply platform. Two torch igniters are symmetrically arranged on the combustion heater, and reliable ignition in a wide parameter range under different wind tunnel states can be realized. A matched high-pressure air supply pipeline, a high-pressure fuel supply pipeline, a high-pressure purging nitrogen supply pipeline, a cooling water supply pipeline, a medium-pressure nitrogen fire-fighting pipeline, an extrusion nitrogen pipeline and a low-pressure control nitrogen pipeline are further arranged. The torch igniter system has the functions of rapid disassembly, reliable supply of high-pressure medium, vibration isolation protection, safety fire-fighting and the like.

Description

Technical Field

[0001] This invention belongs to the field of wind tunnel testing technology, specifically relating to a layout of a torch igniter system for a combustion heater. Background Technology

[0002] When conducting hypersonic vehicle and scramjet engine tests in hypersonic high-temperature wind tunnels, it is necessary to simulate parameters such as Mach number, pressure, temperature, and oxygen content. Combustion heaters are typically used to heat the test gases. Combustion heaters are widely used due to their low cost, rapid start-up, long operating time, and ability to provide high enthalpy and high-pressure inflow conditions. The working principle of combustion heaters is basically the same as that of liquid rocket engines: propellant and oxidizer are injected into the combustion chamber through an injector, mixed, and then ignited to produce high-temperature, high-pressure combustion gases.

[0003] Unlike liquid rocket engine igniters, the flare igniter system installed on the combustion heater body of a hypersonic high-temperature wind tunnel needs to be adaptable to different test conditions and locations, reusable multiple times, adjustable in parameters, stable in complex environments, and have fire protection capabilities.

[0004] Traditional ground-based wind tunnel testing equipment typically uses a flare igniter system where the flare itself is mounted on the heater body. Supply pipelines are then custom-made to connect to the upstream of each medium supply pipeline, depending on the location and ignition parameters. There is no fixed location for this system. When ignition parameters or required media change, or when the wind tunnel combustion heater location is altered, new supply pipelines and components must be fabricated to adapt to the current conditions. Furthermore, after installation, various airtightness and pressure tests are required, significantly impacting testing efficiency. Simultaneously, ground-based wind tunnel testing equipment is susceptible to vibrations from the combustion heater under certain abnormal conditions. The combustion heater's vibration acceleration can exceed 1000g. As an auxiliary device to the combustion heater, the flare igniter system is installed near hazardous sources such as oxidizers and fuels. Moreover, the flare igniter system itself operates under "three highs" (high temperature, high pressure, and high vacuum) during testing. Therefore, the safety and stability of the flare igniter system under complex testing environments are crucial.

[0005] Currently, there is an urgent need to develop a flare igniter system layout for combustion heaters. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a layout for a torch igniter system for a combustion heater.

[0007] The flare igniter system of the combustion heater of the present invention is located near the combustion heater of the hypersonic high temperature wind tunnel. The flare igniter system of the combustion heater is divided into three parts: the flare igniter body, the fixed supply platform and the gantry supply platform. According to the flow direction, the fixed supply platform is located upstream and the gantry supply platform is located downstream. A disassembly and assembly area is provided between the fixed supply platform and the gantry supply platform.

[0008] The flare igniter body includes a sequentially connected ignition tube and a flare body. The ignition tube is inserted into the ignition section of the combustion heater, and the flare body extends out of the ignition section of the combustion heater. There are two flare igniter bodies with an included angle of 120°. The two flare igniter bodies can achieve reliable ignition over a wide parameter range under different test conditions in the hypersonic high-temperature wind tunnel. The flare igniter body is equipped with a high-pressure air interface, a high-pressure purging nitrogen interface, a high-pressure fuel interface, and cooling water inlet and outlet interfaces. Each interface is connected to the corresponding upstream supply pipeline using a stainless steel high-pressure metal hose.

[0009] The fixed supply platform is a fixed platform; above the fixed supply platform are main pipelines for one high-pressure air supply pipeline, one high-pressure fuel supply pipeline, one high-pressure purging nitrogen supply pipeline, two cooling water supply pipelines, one medium-pressure nitrogen fire-fighting pipeline, two compressed nitrogen pipelines, and one low-pressure control nitrogen pipeline, all of which are made of rigid stainless steel; among them, the one high-pressure air supply pipeline, one high-pressure fuel supply pipeline, one high-pressure purging nitrogen supply pipeline, and one low-pressure control nitrogen pipeline extend through the disassembly and assembly area to the left and right symmetrical center lines above the top plate of the gantry supply platform; the two cooling water supply pipelines and one medium-pressure nitrogen fire-fighting pipeline extend down through the disassembly and assembly area to the side of the gantry supply platform; the two compressed nitrogen pipelines are located on the fixed supply platform to provide compressed nitrogen to the high-pressure fuel storage tank;

[0010] The gantry supply platform is a mobile platform, installed above the combustion heater. The bottom of the two side legs of the gantry supply platform are mounted on sliding guide rails parallel to the central axis of the hypersonic high-temperature wind tunnel. The sliding guide rail foundation is isolated from the hypersonic high-temperature wind tunnel foundation. When the position of the combustion heater ignition section changes due to variations in the Mach number during wind tunnel testing, the gantry supply platform adapts to the position change by moving back and forth on the sliding guide rails. Furthermore, the isolation between the sliding guide rail foundation and the hypersonic high-temperature wind tunnel foundation also achieves vibration isolation. The lower surface of the gantry supply platform's top plate is coated with a 0.2mm zirconia heat-insulating coating. This zirconia heat-insulating coating protects the pipes and pipe components above the gantry supply platform's top plate in case of dangerous situations such as high-temperature gas leaks below.

[0011] The gantry supply platform is equipped with one high-pressure air supply pipeline, one high-pressure fuel supply pipeline, one high-pressure purging nitrogen supply pipeline, and one low-pressure control nitrogen pipeline, with two branch pipelines corresponding to each branch pipeline. All branch pipelines are made of rigid stainless steel. Each main pipeline branches into two mirror-symmetrical left and right branch pipelines at the left and right symmetrical center lines, each supplying one of the two flare igniters to ensure synchronous ignition on both sides. Two cooling water supply pipelines extend from the sides of the gantry supply platform to below the top plate, supplying one of the two flare igniters for independent cooling. A medium-pressure nitrogen fire-fighting pipeline extends from the sides of the gantry supply platform to below the top plate for fire suppression.

[0012] The following pipelines entering the disassembly / assembly area are located on the same horizontal plane above the top plate of the gantry supply platform: one high-pressure air supply pipeline, one high-pressure fuel supply pipeline, one high-pressure purging nitrogen supply pipeline, two cooling water supply pipelines, one medium-pressure nitrogen fire-fighting pipeline, and one low-pressure control nitrogen pipeline. All of them are equipped with 37° ball joint pipe connectors. The pipelines are isolated by the 37° ball joint pipe connectors, which facilitates the adjustment of the gantry supply platform position by adding connection sections to adapt to changes in the ignition section position of the combustion heater.

[0013] Furthermore, the main pipeline of the high-pressure air supply system includes a high-pressure air main pressure reducing valve, a high-pressure air bypass solenoid valve, and a high-pressure air main gas electric heater arranged sequentially along the flow direction; the A branch pipeline includes a branch high-pressure air A branch solenoid valve, a high-pressure air A branch orifice plate connector assembly, and a high-pressure air A branch high-pressure metal hose; the B branch pipeline includes a high-pressure air B branch solenoid valve, a high-pressure air B branch orifice plate connector assembly, and a high-pressure air B branch high-pressure metal hose; the high-pressure air supply system and its components are designed to withstand a pressure of 35 MPa and have a nominal diameter of DN20, and are capable of adjusting air supply and gas heating within the range of 0~30 MPa; the high-pressure air supply flow rate can be adjusted by replacing the high-pressure air A branch orifice plate connector assembly and the high-pressure air B branch orifice plate connector assembly with different parameters; during long-term testing in the hypersonic high-temperature wind tunnel, when the upstream high-pressure air pressure fluctuates or falls below the inlet design pressure of the high-pressure air main pressure reducing valve, the high-pressure air bypass solenoid valve is activated to continuously supply high-pressure air.

[0014] Furthermore, the main pipeline of the high-pressure fuel supply line includes a high-pressure fuel storage tank, a high-pressure fuel main line pneumatic ball valve, and a high-pressure fuel main line filter arranged sequentially along the flow direction; the A branch pipeline includes a high-pressure fuel A branch cavitation pipe, a high-pressure fuel A branch pneumatic ball valve, and a high-pressure fuel A branch high-pressure metal hose; the B branch pipeline includes a high-pressure fuel B branch cavitation pipe, a high-pressure fuel B branch pneumatic ball valve, and a high-pressure fuel B branch high-pressure metal hose; the high-pressure fuel storage tank is equipped with a level gauge and a manual filling device; the high-pressure fuel supply line and its components are designed to withstand a pressure of 35 MPa and a nominal diameter of DN10, and are capable of adjusting fuel supply within the range of 0~30 MPa; the high-pressure fuel supply flow rate can be adjusted by replacing the high-pressure fuel A branch cavitation pipe and the high-pressure fuel B branch cavitation pipe according to different parameters.

[0015] Furthermore, the main pipeline of the high-pressure purging nitrogen supply line includes a high-pressure purging nitrogen main line solenoid valve, a high-pressure purging nitrogen main line pressure reducing valve, and a high-pressure purging nitrogen main line filter arranged sequentially along the flow direction; the A branch pipeline includes a high-pressure purging nitrogen A branch solenoid valve, a high-pressure purging nitrogen A branch orifice plate connector assembly, and a high-pressure purging nitrogen A branch high-pressure metal hose; the B branch pipeline includes a high-pressure purging nitrogen B branch solenoid valve, a high-pressure purging nitrogen B branch orifice plate connector assembly, and a high-pressure purging nitrogen B branch high-pressure metal hose; the components of the high-pressure purging nitrogen supply line are designed for a pressure of 35MPa, with a nominal diameter of DN10, and have the ability to adjust the purging nitrogen supply within the range of 0~30MPa. The high-pressure purging nitrogen supply flow rate can be adjusted by replacing the high-pressure purging nitrogen A branch orifice plate connector assembly and the high-pressure purging nitrogen B branch orifice plate connector assembly according to different parameters; the high-pressure purging nitrogen supply line provides film cooling protection gas for the ignition tube.

[0016] Furthermore, the cooling water supply pipeline includes a main cooling water inlet pipe, with branch lines A and B corresponding to two ignition pipes respectively. Branch line A consists of a cooling water inlet metal hose I and a cooling water return metal hose I, while branch line B consists of a cooling water inlet metal hose II and a cooling water return metal hose II. Branch lines A and B converge to the main cooling water return pipe. The cooling water supply pipeline has a design pressure of 6.3 MPa, a nominal diameter of DN10, and a pure water supply capacity of 0.5 MPa to 5 MPa. The cooling water supply pipeline provides cooling water to the inner wall surface of the ignition pipe.

[0017] Furthermore, the medium-pressure nitrogen fire-fighting pipeline includes a medium-pressure nitrogen fire-fighting main pipe, a medium-pressure nitrogen fire-fighting ring pipe, and directional fire sprinklers arranged sequentially along the flow direction. The medium-pressure nitrogen fire-fighting pipeline has a design pressure of 10MPa, a nominal diameter of DN32, and a nitrogen supply capacity of 4.5MPa. The medium-pressure nitrogen fire-fighting ring pipe is located 100mm below the top plate of the gantry supply platform, circling the gantry of the gantry supply platform. Seven directional fire sprinklers are arranged on each side of the medium-pressure nitrogen fire-fighting ring pipe along the wind tunnel axis, with the central axis of the directional fire sprinklers forming a 45° angle with the top plate of the gantry supply platform. The solenoid valve upstream of the medium-pressure nitrogen fire-fighting pipeline is linked to the hypersonic high-temperature wind tunnel safety system. When a dangerous situation, including high-temperature gas leakage, is detected near the combustion heater, the solenoid valve opens rapidly, and medium-pressure nitrogen is sprayed out through the directional fire sprinklers, forming a nitrogen environment below the top plate of the gantry supply platform to block air, thus achieving a fire-fighting effect and protecting the equipment safety of the combustion heater and the flare igniter.

[0018] Furthermore, the compressed nitrogen pipeline includes a pressurized nitrogen pipeline solenoid valve, a pressurized nitrogen pipeline pressure reducing valve, a venting solenoid valve, and a venting orifice plate connector arranged sequentially along the flow direction; the compressed nitrogen pipeline and pipeline components are designed to a pressure of 35MPa, with a nominal diameter of DN10, and have a nitrogen pressurization capacity of 0~30MPa, providing compressed nitrogen to the high-pressure fuel storage tank; the pressure of the high-pressure fuel storage tank can be adjusted by replacing the venting orifice plate connector.

[0019] Furthermore, the main pipeline of the low-pressure controlled nitrogen pipeline includes a low-pressure controlled nitrogen main pipeline hand valve and a low-pressure controlled nitrogen buffer tank arranged sequentially along the flow direction. The low-pressure controlled nitrogen buffer tank is connected to the low-pressure controlled nitrogen branch A and the low-pressure controlled nitrogen branch B respectively, and a pressure gauge is installed on the low-pressure controlled nitrogen buffer tank. The design pressure of the low-pressure controlled nitrogen pipeline and pipeline components is 1.6MPa, the nominal diameter is DN4, and the low-pressure controlled nitrogen supply pressure range is 0.5MPa~0.8MPa. The low-pressure controlled nitrogen buffer tank is arranged on the left and right symmetrical center line positions to provide control gas source for the high-pressure fuel branch A pneumatic ball valve and the high-pressure fuel branch B pneumatic ball valve, so as to realize the rapid opening and closing action of the high-pressure fuel branch A pneumatic ball valve and the high-pressure fuel branch B pneumatic ball valve in a short time.

[0020] The flare igniter system layout for the combustion heater of the present invention can adjust the position and test parameters to adapt to different wind tunnel test conditions; it has the ability to be quickly disassembled and reassembled and can be reused multiple times; it has vibration isolation protection and safety fire-fighting light functions, making maintenance convenient; it can operate stably in complex environments and achieve a reliable supply of high-pressure medium. Attached Figure Description

[0021] Figure 1This is a perspective view of the layout of the torch igniter system for the combustion heater of the present invention;

[0022] Figure 2 This is a front view of the layout of the torch igniter system for the combustion heater of the present invention;

[0023] Figure 3 This is a top view of the layout of the torch igniter system for the combustion heater of the present invention;

[0024] Figure 4 The left view shows the layout of the torch igniter system for the combustion heater of the present invention.

[0025] In the diagram, 1. Flame igniter body; 2. Ignition section of combustion heater; 3. Flame tube; 4. Flame body; 5. Gantry supply platform; 6. Top plate of gantry supply platform; 7. Fixed supply platform; 8. High-pressure air supply pipeline; 9. High-pressure air main line pressure reducing valve; 10. High-pressure air bypass solenoid valve; 11. High-pressure air main line gas electric heater; 12. High-pressure air A branch solenoid valve; 13. High-pressure air A branch orifice plate connector assembly; 14. High-pressure air A branch high-pressure metal hose; 15. High-pressure air B branch solenoid valve; 16. High-pressure air B branch orifice plate connector assembly; 17. 18. High-pressure air B branch high-pressure metal hose; 19. High-pressure fuel supply line; 20. High-pressure fuel storage tank; 21. Level gauge; 22. Manual refueling device; 23. High-pressure fuel main line pneumatic ball valve; 24. High-pressure fuel main line filter; 25. High-pressure fuel A branch cavitation pipe; 26. High-pressure fuel A branch pneumatic ball valve; 27. High-pressure fuel A branch high-pressure metal hose; 28. High-pressure fuel B branch cavitation pipe; 29. ​​High-pressure fuel B branch pneumatic ball valve; 30. High-pressure purging nitrogen supply line; 31. High-pressure purging nitrogen main line solenoid valve 32. High-pressure purging nitrogen main line pressure reducing valve; 33. High-pressure purging nitrogen main line filter; 34. High-pressure purging nitrogen A branch solenoid valve; 35. High-pressure purging nitrogen A branch orifice plate connector assembly; 36. High-pressure purging nitrogen A branch high-pressure metal hose; 37. High-pressure purging nitrogen B branch solenoid valve; 38. High-pressure purging nitrogen B branch orifice plate connector assembly; 39. High-pressure purging nitrogen B branch high-pressure metal hose; 40. Cooling water supply pipeline; 41. Cooling water inlet main pipe; 42. Cooling water inlet metal hose I; 43. Cooling water inlet metal hose II; 44. Cooling water return main pipe; 4 5. Cooling water return metal hose I; 46. Cooling water return metal hose II; 47. Medium-pressure nitrogen fire-fighting pipeline; 48. Medium-pressure nitrogen fire-fighting main pipe; 49. Medium-pressure nitrogen fire-fighting ring pipe; 50. Directional fire sprinkler head; 51. Compressed nitrogen pipeline; 52. Pressurized nitrogen pipeline solenoid valve; 53. Pressurized nitrogen pipeline pressure reducing valve; 54. Venting path solenoid valve; 55. Venting path orifice plate connector; 56. Low-pressure control nitrogen pipeline; 57. Low-pressure control nitrogen main line manual valve; 58. Low-pressure control nitrogen buffer tank; 59. Pressure gauge; 60. Low-pressure control nitrogen A branch; 61. Low-pressure control nitrogen B branch. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example: Figures 1-4As shown, in this embodiment, the flare igniter system for the combustion heater is located near the combustion heater of the hypersonic high-temperature wind tunnel. The flare igniter system layout for the combustion heater is divided into three parts: the flare igniter body 1, the fixed supply platform 7, and the gantry supply platform 5. According to the flow direction, the fixed supply platform 7 is located upstream, and the gantry supply platform 5 is located downstream. A disassembly and assembly area is provided between the fixed supply platform 7 and the gantry supply platform 5.

[0028] The flare igniter body 1 includes a flare tube 3 and a flare body 4 connected in sequence. The flare tube 3 is inserted into the ignition section 2 of the combustion heater, and the flare body 4 extends out of the ignition section 2 of the combustion heater. There are two flare igniter bodies 1 with an included angle of 120°. The two flare igniter bodies 1 can achieve reliable ignition over a wide range of parameters under different test conditions in the hypersonic high-temperature wind tunnel. The flare igniter body 1 is equipped with a high-pressure air interface, a high-pressure purging nitrogen interface, a high-pressure fuel interface, and a cooling water inlet and outlet interface. Each interface is connected to the corresponding upstream supply pipeline using a stainless steel high-pressure metal hose.

[0029] The fixed supply platform 7 is a fixed platform; above the fixed supply platform 7 are the main pipelines of 1 high-pressure air supply pipeline 8, 1 high-pressure fuel supply pipeline 18, 1 high-pressure purging nitrogen supply pipeline 30, 2 cooling water supply pipelines 40, 1 medium-pressure nitrogen fire-fighting pipeline 47, 2 compressed nitrogen pipelines 51, and 1 low-pressure control nitrogen pipeline 56, all of which are made of hard stainless steel; among them, the 1 high-pressure air supply pipeline 8, 1 high-pressure fuel supply pipeline 18, 1 high-pressure purging nitrogen supply pipeline 30, and 1 low-pressure control nitrogen pipeline 56 extend from the disassembly and assembly area to the left and right symmetrical center lines above the top plate 6 of the gantry supply platform 5; the 2 cooling water supply pipelines 40 and the 1 medium-pressure nitrogen fire-fighting pipeline 47 extend down to the side of the gantry supply platform 5 from the disassembly and assembly area; the 2 compressed nitrogen pipelines 51 are set on the fixed supply platform 7 to provide compressed nitrogen to the high-pressure fuel storage tank 19;

[0030] The gantry supply platform 5 is a mobile platform, installed above the combustion heater. The bottom of the two side legs of the gantry supply platform 5 are mounted on sliding guide rails parallel to the central axis of the hypersonic high-temperature wind tunnel. The sliding guide rail base is isolated from the hypersonic high-temperature wind tunnel base. When the position of the combustion heater ignition section 2 changes due to variations in the Mach number during wind tunnel testing, the gantry supply platform 5 adapts to the position change by moving back and forth on the sliding guide rails. Furthermore, the isolation between the sliding guide rail base and the hypersonic high-temperature wind tunnel base also achieves vibration isolation. The lower surface of the gantry supply platform top plate 6 of the gantry supply platform 5 is coated with a 0.2mm zirconia heat-insulating coating. This zirconia heat-insulating coating protects the pipes and pipe components above the gantry supply platform top plate 6 in case of dangerous situations such as high-temperature gas leaks below.

[0031] Above the top plate 6 of the gantry supply platform, there are two branch lines corresponding to one high-pressure air supply line 8, one high-pressure fuel supply line 18, one high-pressure purging nitrogen supply line 30, and one low-pressure control nitrogen line 56. Each branch line is made of hard stainless steel. Each main line is divided into two mirror-symmetrical left and right branch lines at the left and right symmetrical center lines. The left and right branch lines supply two flare igniter bodies 1 respectively to ensure the synchronicity of ignition on both sides. Two cooling water supply lines 40 extend from the side of the gantry supply platform 5 to the bottom of the top plate 6 of the gantry supply platform, supplying two flare igniter bodies 1 respectively for independent cooling. The medium-pressure nitrogen fire-fighting line 47 extends from the side of the gantry supply platform 5 to the bottom of the top plate 6 of the gantry supply platform for fire-fighting.

[0032] The high-pressure air supply pipeline 8, high-pressure fuel supply pipeline 18, high-pressure purging nitrogen supply pipeline 30, cooling water supply pipeline 40, medium-pressure nitrogen fire-fighting pipeline 47, and low-pressure control nitrogen pipeline 56 entering the disassembly and assembly area are located on the same horizontal plane above the top plate 6 of the gantry supply platform, and are all equipped with 37° ball joint pipe connectors. The pipes are isolated by the 37° ball joint pipe connectors, which facilitates the adjustment of the position of the gantry supply platform 5 by adding connection sections to adapt to changes in the position of the combustion heater ignition section 2.

[0033] Further, the main pipeline of the high-pressure air supply line 8 includes a high-pressure air main line pressure reducing valve 9, a high-pressure air bypass solenoid valve 10, and a high-pressure air main line gas electric heater 11 arranged sequentially along the flow direction; the A branch line includes a branch high-pressure air A branch solenoid valve 12, a high-pressure air A branch orifice plate connector assembly 13, and a high-pressure air A branch high-pressure metal hose 14; the B branch line includes a high-pressure air B branch solenoid valve 15, a high-pressure air B branch orifice plate connector assembly 16, and a high-pressure air B branch high-pressure metal hose 17; the high-pressure air supply line... The design pressure of the 8 and piping components is 35MPa, the nominal diameter is DN20, and it has the ability to adjust the air supply and gas heating within the range of 0~30MPa; the high-pressure air supply flow rate can be adjusted by replacing the high-pressure air A branch orifice plate connector assembly 13 and the high-pressure air B branch orifice plate connector assembly 16 according to different parameters; during the long-term test of the hypersonic high-temperature wind tunnel, when the upstream high-pressure air pressure fluctuates or falls below the inlet design pressure of the high-pressure air main pressure reducing valve 9, the high-pressure air bypass solenoid valve 10 will be activated to continuously supply high-pressure air.

[0034] Furthermore, the main pipeline of the high-pressure fuel supply line 18 includes a high-pressure fuel storage tank 19, a high-pressure fuel main pneumatic ball valve 22, and a high-pressure fuel main filter 23 arranged sequentially along the flow direction; the A branch line includes a high-pressure fuel A branch cavitation pipe 24, a high-pressure fuel A branch pneumatic ball valve 25, and a high-pressure fuel A branch high-pressure metal hose 26; the B branch line includes a high-pressure fuel B branch cavitation pipe 27, a high-pressure fuel B branch pneumatic ball valve 28, and a high-pressure fuel B branch high-pressure metal hose 29; the high-pressure fuel storage tank 19 is equipped with a level gauge 20 and a manual filling device 21; the high-pressure fuel supply line 18 and its components are designed to a pressure of 35 MPa and a nominal diameter of DN10, and have the ability to adjust the fuel supply within the range of 0~30 MPa; the high-pressure fuel supply flow rate can be adjusted by replacing the high-pressure fuel A branch cavitation pipe 24 and the high-pressure fuel B branch cavitation pipe 27 according to different parameters.

[0035] Further, the main pipeline of the high-pressure purging nitrogen supply line 30 includes a high-pressure purging nitrogen main pipeline solenoid valve 31, a high-pressure purging nitrogen main pipeline pressure reducing valve 32, and a high-pressure purging nitrogen main pipeline filter 33 arranged sequentially along the flow direction; the A branch pipeline includes a high-pressure purging nitrogen A branch pipeline solenoid valve 34, a high-pressure purging nitrogen A branch pipeline orifice plate connector assembly 35, and a high-pressure purging nitrogen A branch pipeline high-pressure metal hose 36; the B branch pipeline includes a high-pressure purging nitrogen B branch pipeline solenoid valve 37, a high-pressure purging nitrogen B branch pipeline orifice plate connector assembly 35, and a high-pressure purging nitrogen B branch pipeline high-pressure metal hose 36. The head assembly 38 and the high-pressure metal hose 39 for the high-pressure purging nitrogen B branch are included. The high-pressure purging nitrogen supply pipeline 30 has a design pressure of 35MPa and a nominal diameter of DN10. It has the ability to adjust the purging nitrogen supply within the range of 0~30MPa. The high-pressure purging nitrogen supply flow rate can be adjusted by replacing the high-pressure purging nitrogen A branch orifice plate connector assembly 35 and the high-pressure purging nitrogen B branch orifice plate connector assembly 38 according to different parameters. The high-pressure purging nitrogen supply pipeline 30 provides film cooling protection gas for the fuse tube 3.

[0036] Furthermore, the cooling water supply pipeline 40 includes a cooling water inlet main pipe 41, with branch lines A and B corresponding to two ignition pipes 3 respectively. Branch line A consists of a cooling water inlet metal hose I 42 and a cooling water return metal hose I 45, while branch line B consists of a cooling water inlet metal hose II 43 and a cooling water return metal hose II 46. Branch lines A and B converge to the cooling water return main pipe 44. The cooling water supply pipeline 40 has a design pressure of 6.3 MPa, a nominal diameter of DN10, and a pure water supply capacity of 0.5 MPa to 5 MPa. The cooling water supply pipeline 40 provides cooling water to the inner wall surface of the ignition pipe 3.

[0037] Furthermore, the medium-pressure nitrogen fire-fighting pipeline 47 includes a medium-pressure nitrogen fire-fighting main pipe 48, a medium-pressure nitrogen fire-fighting ring pipe 49, and directional fire sprinklers 50 arranged sequentially along the flow direction; the medium-pressure nitrogen fire-fighting pipeline 47 has a design pressure of 10MPa, a nominal diameter of DN32, and a nitrogen supply capacity of 4.5MPa; the medium-pressure nitrogen fire-fighting ring pipe 49 is arranged 100mm below the top plate 6 of the gantry supply platform, and surrounds the gantry of the gantry supply platform 5; seven nozzles are arranged on each side of the medium-pressure nitrogen fire-fighting ring pipe 49 along the wind tunnel axis. The directional fire sprinkler head 50 has its central axis forming a 45° angle with the top plate 6 of the gantry supply platform. The solenoid valve upstream of the medium-pressure nitrogen fire-fighting pipeline 47 is linked to the hypersonic high-temperature wind tunnel safety system. When a dangerous situation, including high-temperature gas leakage, is detected near the combustion heater, the solenoid valve opens rapidly, and medium-pressure nitrogen is sprayed out through the directional fire sprinkler head 50, forming a nitrogen environment below the top plate 6 of the gantry supply platform to block air. This achieves the fire-fighting effect and protects the equipment safety of the combustion heater and the flare igniter body 1.

[0038] Furthermore, the compressed nitrogen pipeline 51 includes a pressurized nitrogen pipeline solenoid valve 52, a pressurized nitrogen pipeline pressure reducing valve 53, a venting solenoid valve 54, and a venting orifice plate connector 55 arranged sequentially along the flow direction; the compressed nitrogen pipeline 51 and pipeline components are designed to a pressure of 35MPa, have a nominal diameter of DN10, and have a nitrogen pressurization capacity of 0~30MPa to provide compressed nitrogen to the high-pressure fuel storage tank 19; the pressure of the high-pressure fuel storage tank 19 can be adjusted by replacing the venting orifice plate connector 55.

[0039] Furthermore, the main pipeline of the low-pressure controlled nitrogen pipeline 56 includes a low-pressure controlled nitrogen main pipeline hand valve 57 and a low-pressure controlled nitrogen buffer tank 58 arranged sequentially along the flow direction. The low-pressure controlled nitrogen buffer tank 58 is connected to the low-pressure controlled nitrogen A branch 60 and the low-pressure controlled nitrogen B branch 61, respectively. A pressure gauge 59 is installed on the low-pressure controlled nitrogen buffer tank 58. The design pressure of the low-pressure controlled nitrogen pipeline 56 and its pipeline components is 1.6MPa, the nominal diameter is DN4, and the low-pressure controlled nitrogen supply pressure range is 0.5MPa~0.8MPa. The low-pressure controlled nitrogen buffer tank 58 is arranged on the left and right symmetrical center line positions to provide control gas source for the high-pressure fuel A branch pneumatic ball valve 25 and the high-pressure fuel B branch pneumatic ball valve 28, so as to realize the rapid opening and closing action of the high-pressure fuel A branch pneumatic ball valve 25 and the high-pressure fuel B branch pneumatic ball valve 28 in a short time.

[0040] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. For those skilled in the art, all features disclosed in the present invention, or all steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way without departing from the principles of the present invention. The present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A torch igniter system for a combustion heater, characterized in that, The flare igniter system is located near the combustion heater of the hypersonic high-temperature wind tunnel. The flare igniter system for the combustion heater is divided into three parts: the flare igniter body (1), the fixed supply platform (7), and the gantry supply platform (5). According to the flow direction, the fixed supply platform (7) is located upstream, and the gantry supply platform (5) is located downstream. A disassembly and assembly area is provided between the fixed supply platform (7) and the gantry supply platform (5). The torch igniter body (1) includes a fire tube (3) and a torch body (4) connected in sequence. The fire tube (3) is inserted into the ignition section (2) of the combustion heater, and the torch body (4) extends out of the ignition section (2) of the combustion heater. There are two torch igniter bodies (1) with an included angle of 120°. The torch igniter body (1) is equipped with a high-pressure air interface, a high-pressure purging nitrogen interface, a high-pressure fuel interface, and a cooling water inlet and outlet interface. Each interface is connected to the upstream supply pipeline using a stainless steel high-pressure metal hose. The fixed supply platform (7) is a fixed platform; the fixed supply platform (7) is equipped with a main pipeline consisting of 1 high-pressure air supply pipeline (8), 1 high-pressure fuel supply pipeline (18), 1 high-pressure purging nitrogen supply pipeline (30), 2 cooling water supply pipelines (40), 1 medium-pressure nitrogen fire-fighting pipeline (47), 2 extrusion nitrogen pipelines (51), and 1 low-pressure control nitrogen pipeline (56), all of which are made of hard stainless steel; among them, 1 high-pressure air supply pipeline (8), 1 high-pressure fuel supply pipeline (18), 1 high-pressure purging nitrogen supply pipeline (30), 2 cooling water supply pipelines (40), 1 medium-pressure nitrogen fire-fighting pipeline (47), 2 extrusion nitrogen pipelines (51), and 1 low-pressure control nitrogen pipeline (56). The following pipelines extend from the disassembly area to the left and right symmetrical center lines above the top plate (6) of the gantry supply platform (5): one high-pressure purging nitrogen supply pipeline (30) and one low-pressure control nitrogen pipeline (56); two cooling water supply pipelines (40) and one medium-pressure nitrogen fire-fighting pipeline (47) extend from the disassembly area to the side of the gantry supply platform (5); and two compressed nitrogen pipelines (51) are installed on the fixed supply platform (7) to provide compressed nitrogen to the high-pressure fuel storage tank (19). The gantry supply platform (5) is a mobile platform; it is installed above the combustion heater; the bottom of the two side legs of the gantry supply platform (5) are installed on a sliding guide rail parallel to the central axis of the hypersonic high temperature wind tunnel, and the foundation of the sliding guide rail is isolated from the foundation of the hypersonic high temperature wind tunnel; the lower surface of the top plate (6) of the gantry supply platform (5) is sprayed with a 0.2mm zirconium oxide heat insulation coating; Above the top plate (6) of the gantry supply platform, there are two branch pipelines corresponding to one high-pressure air supply pipeline (8), one high-pressure fuel supply pipeline (18), one high-pressure purging nitrogen supply pipeline (30), and one low-pressure control nitrogen pipeline (56). Each branch pipeline is made of hard stainless steel. Each main pipeline is divided into two mirror-symmetrical branch pipelines at the left and right symmetrical center line positions. The left and right branch pipelines supply two torch igniter bodies (1) respectively. Two cooling water supply pipelines (40) extend from the side of the gantry supply platform (5) to the bottom of the top plate (6) of the gantry supply platform, respectively supplying two torch igniter bodies (1). The medium-pressure nitrogen fire-fighting pipeline (47) extends from the side of the gantry supply platform (5) to the bottom of the top plate (6) of the gantry supply platform for fire fighting. The high-pressure air supply pipeline (8), high-pressure fuel supply pipeline (18), high-pressure purging nitrogen supply pipeline (30), cooling water supply pipeline (40), medium-pressure nitrogen fire-fighting pipeline (47) and low-pressure control nitrogen pipeline (56) entering the disassembly and assembly area are located on the same horizontal plane above the top plate (6) of the gantry supply platform, and are all equipped with 37° ball joint pipeline connectors.

2. The torch igniter system for a combustion heater according to claim 1, characterized in that, The main pipeline of the high-pressure air supply line (8) includes a high-pressure air main pipeline pressure reducing valve (9), a high-pressure air bypass solenoid valve (10), and a high-pressure air main pipeline gas electric heater (11) arranged sequentially along the flow direction; the A branch pipeline includes a branch high-pressure air A branch solenoid valve (12), a high-pressure air A branch orifice plate connector assembly (13), and a high-pressure air A branch high-pressure metal hose (14); the B branch pipeline includes a high-pressure air B branch solenoid valve (15), a high-pressure air B branch orifice plate connector assembly (16), and a high-pressure air B branch high-pressure metal hose (17); the high-pressure air supply... The design pressure of the pipeline (8) and pipeline components is 35MPa, the nominal diameter is DN20, and it has the ability to adjust the air supply and gas heating within the range of 0~30MPa. By replacing the high-pressure air A branch orifice plate connector assembly (13) and the high-pressure air B branch orifice plate connector assembly (16) according to different parameters, the high-pressure air supply flow rate can be adjusted. During the long-term test of the hypersonic high-temperature wind tunnel, when the upstream high-pressure air pressure fluctuates or is lower than the inlet design pressure of the high-pressure air main pressure reducing valve (9), the high-pressure air bypass solenoid valve (10) will be opened to continuously supply high-pressure air.

3. The torch igniter system for a combustion heater according to claim 2, characterized in that, The main pipeline of the high-pressure fuel supply pipeline (18) includes a high-pressure fuel storage tank (19), a high-pressure fuel main pneumatic ball valve (22), and a high-pressure fuel main filter (23) arranged sequentially along the flow direction; the A branch pipeline includes a high-pressure fuel A branch cavitation pipe (24), a high-pressure fuel A branch pneumatic ball valve (25), and a high-pressure fuel A branch high-pressure metal hose (26); the B branch pipeline includes a high-pressure fuel B branch cavitation pipe (27), a high-pressure fuel B branch pneumatic ball valve (28), and a high-pressure fuel B branch high-pressure metal hose (29); the high-pressure fuel storage tank (19) is equipped with a level gauge (20) and a manual filling device (21); the high-pressure fuel supply pipeline (18) and pipeline components are designed with a pressure of 35MPa and a nominal diameter of DN10, and have the ability to adjust the fuel supply within the range of 0~30MPa; the high-pressure fuel supply flow rate can be adjusted by replacing the high-pressure fuel A branch cavitation pipe (24) and the high-pressure fuel B branch cavitation pipe (27) according to different parameters.

4. The torch igniter system for a combustion heater according to claim 3, characterized in that, The main pipeline of the high-pressure purging nitrogen supply line (30) includes a high-pressure purging nitrogen main pipeline solenoid valve (31), a high-pressure purging nitrogen main pipeline pressure reducing valve (32), and a high-pressure purging nitrogen main pipeline filter (33) arranged sequentially along the flow direction; the A branch pipeline includes a high-pressure purging nitrogen A branch solenoid valve (34), a high-pressure purging nitrogen A branch orifice plate connector assembly (35), and a high-pressure purging nitrogen A branch high-pressure metal hose (36); the B branch pipeline includes a high-pressure purging nitrogen B branch solenoid valve (37), and a high-pressure purging nitrogen B branch orifice plate connector assembly. Component (38), high-pressure purging nitrogen B branch high-pressure metal hose (39); high-pressure purging nitrogen supply pipeline (30) has a pipeline component design pressure of 35MPa and a nominal diameter of DN10. It has the ability to adjust the purging nitrogen supply within the range of 0~30MPa. The high-pressure purging nitrogen supply flow rate can be adjusted by replacing the high-pressure purging nitrogen A branch orifice plate connector assembly (35) and the high-pressure purging nitrogen B branch orifice plate connector assembly (38) with corresponding different parameters; the high-pressure purging nitrogen supply pipeline (30) provides gas film cooling protection gas for the fuse tube (3).

5. The torch igniter system for a combustion heater according to claim 4, characterized in that, The cooling water supply pipeline (40) includes a cooling water inlet main pipe (41), with branch A and branch B corresponding to two ignition pipes (3) respectively. Branch A is a cooling water inlet metal hose I (42) and a cooling water return metal hose I (45), and branch B is a cooling water inlet metal hose II (43) and a cooling water return metal hose II (46). Branch A and branch B are connected to the cooling water return main pipe (44). The cooling water supply pipeline (40) has a design pressure of 6.3MPa, a nominal diameter of DN10, and a pure water supply capacity of 0.5MPa to 5MPa. The cooling water supply pipeline (40) provides cooling water to the inner wall of the ignition pipe (3).

6. The torch igniter system for a combustion heater according to claim 5, characterized in that, The medium-pressure nitrogen fire-fighting pipeline (47) includes a medium-pressure nitrogen fire-fighting main pipe (48), a medium-pressure nitrogen fire-fighting ring pipe (49), and directional fire sprinklers (50) arranged sequentially along the flow direction; the medium-pressure nitrogen fire-fighting pipeline (47) has a design pressure of 10MPa, a nominal diameter of DN32, and a nitrogen supply capacity of 4.5MPa; the medium-pressure nitrogen fire-fighting ring pipe (49) is arranged 100mm below the top plate (6) of the gantry supply platform, and surrounds the gantry of the gantry supply platform (5). Seven directional fire sprinklers (50) are arranged on each side along the wind tunnel axis. The central axis of the directional fire sprinklers (50) forms a 45° angle with the top plate (6) of the gantry supply platform. The solenoid valve upstream of the medium-pressure nitrogen fire pipeline (47) is linked with the hypersonic high-temperature wind tunnel safety system. When a dangerous situation, including high-temperature gas leakage, is detected near the combustion heater, the solenoid valve opens quickly, and medium-pressure nitrogen is sprayed out through the directional fire sprinklers (50) to form a nitrogen environment below the top plate (6) of the gantry supply platform, blocking the air.

7. The torch igniter system for a combustion heater according to claim 6, characterized in that, The compressed nitrogen pipeline (51) includes a pressurized nitrogen pipeline solenoid valve (52), a pressurized nitrogen pipeline pressure reducing valve (53), a venting solenoid valve (54), and a venting orifice plate connector (55) arranged sequentially along the flow direction. The compressed nitrogen pipeline (51) and pipeline components are designed to a pressure of 35MPa and a nominal diameter of DN10. It has a nitrogen pressurization capacity of 0~30MPa and provides compressed nitrogen to the high-pressure fuel storage tank (19). The pressure of the high-pressure fuel storage tank (19) can be adjusted by replacing the venting orifice plate connector (55).

8. The torch igniter system for a combustion heater according to claim 7, characterized in that, The main pipeline of the low-pressure controlled nitrogen pipeline (56) includes a low-pressure controlled nitrogen main pipeline hand valve (57) and a low-pressure controlled nitrogen buffer tank (58) arranged sequentially along the flow direction. The low-pressure controlled nitrogen buffer tank (58) is connected to the low-pressure controlled nitrogen A branch (60) and the low-pressure controlled nitrogen B branch (61) respectively. A pressure gauge (59) is installed on the low-pressure controlled nitrogen buffer tank (58). The design pressure of the low-pressure controlled nitrogen pipeline (56) and pipeline components is 1.6MPa, the nominal diameter is DN4, and the low-pressure controlled nitrogen supply pressure range is 0.5MPa~0.8MPa. The low-pressure controlled nitrogen buffer tank (58) is arranged on the left and right symmetrical center line position to provide control gas source for the high-pressure fuel A branch pneumatic ball valve (25) and the high-pressure fuel B branch pneumatic ball valve (28).

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