A rotating gas generator combustion experiment system

Abstract

The application discloses a rotating gas generator combustion experiment system, which comprises a rotating gas generator experiment table, a supply system, a measurement and control system and an ignition system. The rotating gas generator experiment table is connected with the supply system, the ignition system and the measurement and control system. The supply system is used for stably supplying fuel and oxidant gas for the rotating gas generator on the rotating gas generator experiment table and can adjust the gas flow through a computer. The ignition system is used for igniting the rotating gas generator. The measurement and control system is used for collecting and recording the temperature, pressure and rotating speed of the rotating gas generator during work and can adjust the gas flow and pressure through the computer to realize closed-loop control of the rotating speed of the rotating gas generator. The application can simulate the combustion performance of the rotating gas generator under different flow rates and equivalence ratios and can realize closed-loop control of the rotating speed of the rotating gas generator and precise control of the combustion process.

Description

Technical Field

[0001] The invention relates to the field of gas generator test benches, in particular to a rotary gas generator combustion test system. Background Art

[0002] In aircraft engines, turbine blades are considered the most critical components, situated in the harshest environments. Their performance, particularly their temperature tolerance, is a crucial indicator of the engine's sophistication. As the engine's thrust-to-weight ratio increases, the temperature in front of the turbine increases. For hypersonic vehicles, higher flight Mach numbers mean higher total inflow temperatures, easily exceeding the turbine's temperature tolerance. At this point, the combustion chamber struggles to add heat, disrupting the thermodynamic cycle. Furthermore, designing a cooling structure for the turbine is a highly challenging task, requiring comprehensive consideration of multiple factors, including heat load, material properties, manufacturing processes, and flow characteristics, to ensure blade reliability and lifespan while increasing turbine inlet temperatures. A rotary gas generator (RGG) is a simple and reliable rotary combustion device capable of simultaneously delivering shaft power and thrust. It can replace the turbine, fundamentally resolving the severe constraint on thermodynamic cycle efficiency caused by the turbine's temperature tolerance in existing aircraft engines. Its simple and reliable structure also facilitates the design of cooling structures, thereby improving combustion efficiency. As a brand-new technology, the design and performance optimization of the rotary gas generator are crucial. Therefore, an experimental system is needed to simulate the combustion performance of the rotary gas generator at different flow rates and equivalence ratios, providing experimental data support for the design and optimization of the rotary gas generator.

[0003] Traditional gas generator designs typically employ static structures, making it difficult to achieve stable combustion at high rotational speeds. Static gas generator test benches are relatively simple to design and do not require consideration of the complexities caused by rotation. However, rotating gas generator test benches present a host of design and operational challenges compared to stationary gas generator test benches. First, rotating gas generators require precise dynamic balancing to prevent excessive vibration during high-speed rotation, which could damage the equipment or affect experimental results. Second, during rotation, the gas generator and gas supply lines must be sealed from the external environment to prevent gas leakage. Stable connections between the rotating gas generator and other systems must also be ensured. Furthermore, the centrifugal force generated by high-speed rotation can affect the flow characteristics, mixing, and combustion process of the gases within the combustion chamber, requiring specific attention. Furthermore, during rotation, controlling the combustion process (e.g., ignition and combustion stability) becomes more difficult. For example, after ignition, the igniter must be able to disengage promptly to prevent interference with the rotating gas generator, potentially leading to experimental failure and safety issues. In view of these difficulties, when designing and operating a rotary gas generator test bench, it is necessary to comprehensively consider knowledge from multiple disciplines such as mechanics, thermodynamics, and fluid mechanics, and adopt corresponding technical measures to overcome these challenges.

[0004] The existing rotating gas generator combustion process often lacks precise control means, resulting in low combustion efficiency, and affecting the stability and safety of the entire system. In addition, due to the lack of effective experimental systems to simulate and test the performance of rotating gas generators under different working conditions, the in-depth study of their design and optimization is limited. Therefore, developing a combustion experimental system and combustion control method that can accurately measure and control the key performance parameters (such as rotational speed, temperature and pressure) of the rotating gas generator under working conditions is of great significance for improving combustion efficiency, optimizing design and enhancing system reliability. SUMMARY

[0005] The present application aims to solve the above-mentioned problems in the prior art, and provides a rotating gas generator combustion experimental system, which can simulate the combustion performance under different flow rates and equivalence ratios, and real-time collect key parameters, in order to accurately control the combustion process of the rotating gas generator. Through this system, closed-loop control of the rotational speed of the rotating gas generator can be achieved, thereby effectively improving the combustion efficiency, real-time detecting the combustion state, and accurately controlling the rotational speed of the rotating gas generator, providing an effective experimental means for the design, optimization and performance testing of the rotating gas generator.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] A rotating gas generator combustion experimental system, comprising a rotating gas generator experimental table, a supply system, a measurement and control system and an ignition system; the rotating gas generator experimental table is connected with the supply system, the ignition system and the measurement and control system respectively;

[0008] The supply system is used to stably supply fuel and oxidant gas for the gas generator on the rotating gas generator experimental table, and can adjust the gas flow through the computer; the ignition system is used to ignite the rotating gas generator, and the measurement and control system is used to collect and record the temperature, pressure and rotational speed of the rotating gas generator during operation, and can adjust the gas flow and pressure through the computer to realize closed-loop control of the rotational speed of the rotating gas generator.

[0009] Further, the supply system comprises an air compressor, an air cylinder, a methane cylinder, a drying box, an air flow meter, a methane flow meter, a valve one, a valve two, a valve three and a premixing box; the valve one is arranged on a pipeline through which the air compressor communicates with the air cylinder, the valve two and the air flow meter are arranged on an air supply pipeline through which the drying box communicates with the premixing box, and the valve three and the methane flow meter are arranged on a methane supply pipeline through which the methane cylinder communicates with the premixing box; compressed air generated by the air compressor is delivered to the air cylinder through the pipeline, and the air is controlled to be turned on and off by the valve one; then when the valve two is opened, the air flows out of the air cylinder, is dried in the drying box, and then flows through the valve two and the air flow meter in sequence and then flows into the premixing box to be mixed with methane gas; the methane cylinder stores high-pressure gaseous methane, and when the valve three is opened, the gaseous methane flows out of the methane cylinder, flows through the valve three and the methane flow meter in sequence and then enters the premixing box to be mixed with air.

[0010] Further, the rotating gas generator test bench comprises a test bench frame, and a dynamic-static sealing device, a rotating gas generator assembly, a flexible coupling, a compressor assembly connected in sequence through three bearings, and bearing seats one, two and three for fixing and supporting bearings at connecting positions are fixed on the test bench frame; one end of the dynamic-static sealing device is connected with a static fuel supply pipeline connected with the premixing box, and the other end is connected with a shaft of the rotating gas generator assembly through a bearing and rotates with the rotating combustion chamber; the rotating gas generator assembly comprises a rotating combustion chamber, a nozzle and a convergent nozzle, and the premixed gas of methane and air enters the rotating combustion chamber through the dynamic-static sealing device, is ignited through the ignition system, the high-temperature and high-pressure gas generated by combustion flows in the nozzle and is accelerated and sprayed out through the convergent nozzle to drive the rotating gas generator to rotate.

[0011] Further, the ignition system comprises a quick plug ignition electrode and a high-energy igniter, the quick plug ignition electrode and the high-energy igniter are connected through a cable and are threadedly connected on a side wall of the combustion chamber of the rotating gas generator assembly; the quick plug ignition electrode is connected between an ignition electrode body and an ignition cable in a quick plug manner.

[0012] Further, the measurement and control system comprises a temperature sensor, a pressure sensor, a rotating speed sensor, a collection card, a signal amplifier and a computer, the temperature sensor is arranged at the outlet of one of the nozzles of the rotating gas generator assembly, and is used for measuring the temperature at the outlet of the nozzle; the pressure sensor is arranged on the sidewall of the combustion chamber of the rotating gas generator assembly and extends into the interior of the combustion chamber, and is used for measuring the pressure change in the interior of the combustion chamber; the rotating speed sensor is arranged beside the flexible coupling, and is used for measuring the rotating speed when the rotating gas generator works; the signal amplifier amplifies and filters the signals of the sensors, and transmits the signals to the collection card; the collection card transmits the collected sensor signals to the computer; the computer displays and records the information parameters of the collected sensor signals in real time; the computer is also connected with an air supply pipeline and a methane supply pipeline, and can control the air flow meter and the methane flow meter by inputting the rotating speed requirement, so as to adjust the mass flow of the fuel and the oxidant, and then stabilize the combustion and improve the combustion efficiency, so as to realize the closed-loop control on the rotating speed of the rotating gas generator.

[0013] Further, the air compressor can provide an air pressure of 0-8 atm and an air flow of 0.5 kg / s.

[0014] Further, the maximum working pressure of the dynamic and static sealing device is 1 MPa, the maximum flow is 1000 L / min, and the highest rotating speed is 10000 rpm.

[0015] Further, the design pressure of the rotating gas generator assembly is 1 MPa, the rotating speed is 10000 rpm, and the maximum flow is 30 g / s.

[0016] Further, the experimental bench is fixed to the ground through foundation bolts, and is blocked by steel plates on the upper, lower, left, right and rear sides to prevent danger.

[0017] Compared with the background art, the present application has the following beneficial effects:

[0018] (1) The present application can simulate the combustion performance of the rotating gas generator under different flow rates and equivalence ratios, and provide experimental data support for design and optimization, thereby breaking through the limitations of the traditional static gas generator experimental system.

[0019] (2) The present application effectively solves the difficulties and problems commonly existing in the design and operation of the rotating gas generator experimental system, such as the vibration prevention, sealing and combustion stability of the rotating system, and the disengagement of the igniter after ignition of the rotating gas generator.

[0020] (3)The application can collect key parameters such as combustion exhaust temperature, combustion chamber pressure and rotating gas generator rotating speed in real time, and through computer control of gas flow, the rotating speed of the rotating gas generator is closed-loop controlled, and the combustion process is accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the rotating gas generator combustion experiment system of the application.

[0022] Figure 2 is the overall system diagram of the rotating gas generator combustion experiment system of the application, wherein, 1-air compressor, 2-valve one, 3-methane gas cylinder, 4-air cylinder, 5-drying box, 6-valve two, 7-valve three, 8-air flowmeter, 9-methane flowmeter, 10-premixing box, 11-dynamic and static sealing device, 12-bearing seat one, 13-rotating gas generator assembly, 14-bearing seat two, 15-flexible coupling, 16-bearing seat three, 17-air compressor assembly, 18-temperature sensor, 19-pressure sensor, 20-rotating speed sensor, 21-computer, 22-fast plug-in ignition electrode, 23-high-energy igniter, 24-experimental bench.

[0023] Figure 3 is the principle diagram of the rotating gas generator combustion control method of the application. DETAILED DESCRIPTION

[0024] The application will be described in detail below according to the drawings and preferred embodiments, and the purposes and effects of the application will become more apparent, and it should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0025] As Figure 1 shown, the example of the application provides a rotating gas generator combustion experiment system, which comprises a supply system, a rotating gas generator experiment bench, an ignition system and a measurement and control system; the rotating gas generator experiment bench is connected with the supply system, the ignition system and the measurement and control system respectively;

[0026] The supply system is used for stably supplying fuel and oxidant gas for the gas generator on the rotating gas generator experiment bench, and can adjust the gas flow through a computer; the ignition system is used for igniting the rotating gas generator; the measurement and control system is used for collecting and recording parameters such as temperature, pressure and rotating speed of the rotating gas generator during work, and can adjust the gas flow and pressure through a computer to realize closed-loop control of the rotating speed of the rotating gas generator.

[0027] The rotating gas generator combustion experiment system will be further described below. Figure 2

[0028] ​The supply system comprises an air compressor 1, a valve 2, a methane gas cylinder 3, an air gas cylinder 4, a drying box 5, a valve 6, a valve 7, an air flow meter 8, a methane flow meter 9 and a premixing box 10.

[0029] The valve 2 is arranged on the pipeline connecting the air compressor 1 and the air gas cylinder 4, the valve 6 and the air flow meter 8 are arranged on the air supply pipeline connecting the drying box 5 and the premixing box 10, and the valve 7 and the methane flow meter 9 are arranged on the methane supply pipeline connecting the methane gas cylinder 3 and the premixing box 10. The compressed air is stored in the air compressor 1, and the air compressor 1 can provide an air pressure of 0-8 atm and an air flow of 0.5 kg / s. The compressed air generated by the air compressor 1 is delivered to the air gas cylinder 4 through the pipeline, and the air on-off is controlled by the valve 2 to ensure the safety of the experiment. When the valve 6 is opened, the air flows out of the air gas cylinder 4, is dried in the drying box 5, and then flows through the valve 6 and the air flow meter 8 in sequence, and then flows into the premixing box 10 to be mixed with the methane gas. The high-pressure gaseous methane is stored in the methane gas cylinder 3, and a pressure reducing valve is used to reduce the pressure during the experiment, and the valve 7 is opened, so that the gaseous methane flows out of the methane gas cylinder 3, flows through the valve 7 and the methane flow meter 9 in sequence, and then enters the premixing box 10 to be mixed with the air. The air flow meter 8 and the methane flow meter 9 can monitor the gas mass flow in the pipeline in real time and adjust the gas mass flow. The left two ends of the premixing box 10 are respectively the air and methane inlets, and the right end is the premixed gas outlet, which is connected with the dynamic and static sealing device 11 of the rotating gas generator experimental bench.

[0030] In this embodiment, the specific types of the valve 2, the valve 6 and the valve 7 are not limited, for example, they can be solenoid valves, pneumatic valves or electric valves.

[0031] Since the rotating gas generator assembly 13 rotates at high speed during work, and the premixed gas supply pipeline is static, a dynamic and static sealing device 11 is needed. The rotating gas generator experimental bench comprises a bench frame 24, and the dynamic and static sealing device 11, the rotating gas generator assembly 13, the flexible coupling 15, the air compressor assembly 17, and the bearing seat one 12, the bearing seat two 14 and the bearing seat three 16 for fixing and supporting the bearings are sequentially connected through three bearings and fixed on the bench frame 24. One end of the dynamic and static sealing device 11 is connected with the static fuel supply pipeline connected with the premixing box 10, and the other end is connected with the shaft of the rotating gas generator assembly 13 through a bearing, and rotates with the combustion chamber, and the bearing is fixed on the bench frame 24 through the bearing seat one 12. The maximum working pressure of the dynamic and static sealing device 11 is 1 MPa, the maximum flow is 1000 L / min, and the maximum rotating speed is 10000 rpm.

[0032] The rotating gas generator assembly 13 includes a rotating combustion chamber, a nozzle and a convergent nozzle. The design pressure of the rotating gas generator assembly is 1 MPa, the rotating speed is 10000 rpm, and the maximum flow rate is 30 g / s. The premixed gas of methane and air enters the rotating combustion chamber through the dynamic and static sealing device 11, is ignited by the ignition system, and the high temperature and high pressure gas generated by combustion flows in the nozzle and is accelerated and sprayed out through the convergent nozzle to drive the rotating gas generator to rotate.

[0033] The compressor assembly 17 includes a compressor impeller, a guide vane, a compressor casing, a compressor shaft, etc. The shaft of the compressor assembly 17 is connected with the shaft of the rotating gas generator assembly 13 through the flexible coupling 15, and is fixed on the experimental bench 24 through the bearing seat two 14 and the bearing seat three 16.

[0034] Figure 2 The experimental bench 24 in the above is a simplified schematic view. In fact, the experimental bench 24 is built by 80mm*80mm aluminum profiles. Since the rotating gas generator is in a high-speed rotating, high-temperature and high-pressure working environment during work, the experimental bench 24 needs to be fixed to the ground through foundation bolts, and the upper, lower, left, right and rear are blocked by 10mm steel plates to prevent danger.

[0035] The ignition system includes a quick plug ignition electrode 22 and a high-energy igniter 23. The quick plug ignition electrode 22 is connected with the high-energy igniter 23 through a cable, and is connected with the rotating gas generator through a threaded connection.

[0036] In the above, Figure 2 The quick plug ignition electrode 22 is connected with the combustion chamber side wall of the rotating gas generator assembly 13 through a threaded connection and extends into the combustion chamber, so that the electric spark generated by the ignition electrode 22 can ignite the premixed gas of methane and air in the combustion chamber when starting the high-energy igniter 23. In order to disconnect the cable from the quick plug ignition electrode 22 after igniting the premixed gas in the rotating gas generator assembly 13, a joint mode of the cable and the ignition electrode body with quick plug is developed. The ignition system has the functions of high-energy ignition and quick disconnection of the cable from the ignition electrode. After the appropriate premixed gas of methane and air is introduced into the combustion chamber, the high-energy igniter 23 is started, and after the gas in the combustion chamber is ignited, the cable is quickly disconnected from the ignition electrode 22. Then, the premixed gas flow is increased, and at this time the rotating gas generator starts to work under the driving of high temperature and high pressure gas.

[0037] The measurement and control system includes a temperature sensor 18, a pressure sensor 19, a rotating speed sensor 20, an acquisition card, a signal amplifier and a computer 21.

[0038] In the above, Figure 2In the figure, a temperature sensor 18 is located at the outlet of one of the nozzles of the rotary gas generator assembly 13, a pressure sensor 19 is located on the sidewall of the combustion chamber of the rotary gas generator assembly 13 and extends deep into the combustion chamber, and a rotation speed sensor 20 is located next to the flexible coupling 15. The temperature sensor 18 is used to measure the temperature at the nozzle outlet of the rotary gas generator assembly 13, the pressure sensor 19 is used to measure the pressure change within the combustion chamber of the rotary gas generator assembly 13, and the rotation speed sensor 20 is used to measure the rotation speed of the rotary gas generator assembly 13 during operation. A signal amplifier amplifies and filters the signals from each sensor and transmits them to an acquisition card. The acquisition card transmits the collected sensor signals to a computer 21, whose measurement and control software displays and records the information parameters of the collected sensor signals in real time. Computer 21 is also connected to the air supply pipeline and the methane supply pipeline. It can control the air flow meter 8 and the methane flow meter 9 based on the input rotation speed requirement to adjust the mass flow of the fuel and oxidizer, thereby stabilizing combustion and improving combustion efficiency, thereby achieving closed-loop control of the rotation speed of the rotary gas generator 13.

[0039] The following combination Figure 3 The rotary gas generator combustion control method is further explained.

[0040] like Figure 3 As shown, after the high-energy igniter is activated and the premixed gas is successfully ignited within the combustion chamber of the rotary gas generator assembly 13 using the quick-plug ignition nozzle 22, the rotary gas generator begins to rotate. The methane flowmeter 9 and air flowmeter 8 are manually adjusted to ensure stable combustion and rotation of the rotary gas generator at an appropriate gas flow rate. The temperature sensor 18, pressure sensor 19, and speed sensor 20 begin collecting parameter signals from the rotary gas generator during operation. The signal amplifier amplifies and filters the signals from each sensor and transmits them to an acquisition card, which then transmits the collected sensor signals to a computer. Based on the experimental requirements, a speed command is input into the measurement and control software of computer 21. The deviation between the actual speed and the command speed serves as input to the controller. The controller outputs a corrected parameter based on the speed deviation. This parameter serves as input to the measurement and control software of computer 21. The measurement and control software of computer 21 adjusts the air and methane flow rates based on the input corrected parameter, once again ensuring stable combustion and rotation of the rotary gas generator at an appropriate gas flow rate. This feedback process is repeated until the speed correction is complete, i.e., the deviation between the actual speed and the command speed is within a reasonable, configurable range.

[0041] Those skilled in the art can understand that the above description is only the preferred examples of the present application and is not used to limit the present application, and although the present application is described in detail with reference to the foregoing examples, those skilled in the art can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for part of the technical features. Any modification, equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotary gas generator combustion experimental system, characterized in that: It includes a rotary gas generator test bench, a supply system, a measurement and control system, and an ignition system; the rotary gas generator test bench is connected to the supply system, the ignition system, and the measurement and control system respectively; The rotary gas generator test bench includes a test bench frame, and a dynamic and static sealing device, a rotary gas generator assembly, a flexible coupling, and a compressor assembly fixed on the test bench frame and connected in sequence through three bearings; The ignition system includes a quick-plug ignition nozzle and a high-energy igniter; The supply system is used to stably supply fuel and oxidant gas to the rotary gas generator assembly on the rotary gas generator test bench, and the gas flow rate can be adjusted by a computer. The ignition system is used to ignite the rotary gas generator assembly. The measurement and control system is used to collect and record the temperature, pressure and speed of the rotary gas generator assembly during operation, and the gas flow rate and pressure can be adjusted by a computer to achieve closed-loop control of the speed of the rotary gas generator assembly.

2. The rotary gas generator combustion test system according to claim 1, characterized in that: The supply system includes an air compressor, an air cylinder, a methane cylinder, a drying box, an air flow meter, a methane flow meter, valve one, valve two, valve three and a premixing box; valve one is arranged on the pipeline connecting the air compressor and the air cylinder, valve two and the air flow meter are arranged on the air supply pipeline connecting the drying box and the premixing box, and valve three and the methane flow meter are arranged on the methane supply pipeline connecting the methane cylinder and the premixing box; the compressed air generated by the air compressor is transported to the air cylinder through the pipeline, and the air is controlled by valve one; when valve two is opened, the air will flow out of the air cylinder, be dried in the drying box, and then flow through valve two and the air flow meter in sequence, and then flow into the premixing box to be mixed with methane gas; the methane cylinder stores high-pressure gaseous methane, and when valve three is opened, the gaseous methane flows out of the methane cylinder, flows through valve three and the methane flow meter in sequence, and enters the premixing box to be mixed with air.

3. The rotary gas generator combustion test system according to claim 2, characterized in that: The rotary gas generator test bench also includes bearing seats 1, 2, and 3 located at the connection point for fixing and supporting bearings. One end of the dynamic and static sealing device is connected to the stationary fuel supply pipeline connected to the premix tank, and the other end is connected to the shaft of the rotary gas generator assembly via a bearing, and rotates with the rotary combustion chamber. The rotary gas generator assembly includes a rotary combustion chamber, a nozzle, and a convergent nozzle. The premixed gas of methane and air enters the rotary combustion chamber through the dynamic and static sealing device and is then ignited by the ignition system. The high-temperature and high-pressure gas generated by the combustion flows within the nozzle and is accelerated and ejected through the convergent nozzle, driving the rotary gas generator assembly to rotate.

4. The rotary gas generator combustion experimental system according to claim 3, characterized in that: The quick-plug ignition nozzle is connected to the high-energy igniter through a cable and is threadedly connected to the combustion chamber side wall of the rotary gas generator assembly; the connection between the ignition nozzle body of the quick-plug ignition nozzle and the ignition cable is a quick plug.

5. The rotary gas generator combustion test system according to claim 4, characterized in that: The measurement and control system includes a temperature sensor, a pressure sensor, a rotational speed sensor, an acquisition card, a signal amplifier, and a computer. The temperature sensor is disposed at the outlet of one of the nozzles of the rotary gas generator assembly to measure the temperature at the nozzle outlet. The pressure sensor is disposed on the sidewall of the combustion chamber of the rotary gas generator assembly and extends into the combustion chamber to measure pressure changes within the combustion chamber. The rotational speed sensor is disposed adjacent to the flexible coupling to measure the rotational speed of the rotary gas generator assembly during operation. The signal amplifier amplifies and filters the signals from each sensor and transmits them to the acquisition card. The acquisition card transmits the collected sensor signals to the computer, which displays and records the information parameters of the collected sensor signals in real time. The computer is also connected to air and methane supply pipelines and can control the air flow meter and methane flow meter based on input rotational speed requirements to adjust the mass flow rates of fuel and oxidant, thereby stabilizing combustion and improving combustion efficiency, thereby achieving closed-loop control of the rotational speed of the rotary gas generator assembly.

6. The rotary gas generator combustion test system according to claim 2, characterized in that: The air compressor can provide an air pressure of 0-8 atm and an air flow rate of 0.5 kg / s.

7. The rotary gas generator combustion test system according to claim 3, characterized in that: The maximum working pressure of the dynamic and static sealing device is 1 MPa, the maximum flow rate is 1000 L / min, and the maximum rotation speed is 10000 rpm.

8. The rotary gas generator combustion test system according to claim 3, characterized in that: The design pressure of the rotating gas generator assembly is 1 MPa, the rotation speed is 10,000 rpm, and the maximum flow rate is 30 g / s.

9. The rotary gas generator combustion test system according to claim 3, characterized in that: The experimental bench is fixed to the ground by anchor bolts and is blocked by steel plates at the top, bottom, left, right and back to prevent danger.

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