A high-temperature high-pressure air supply system for a combustion test bed and a method of operating the same

Abstract

The application relates to a high-temperature and high-pressure air supply system of a combustion test bench and an operation method thereof, comprising at least two test benches, at least two main air inlet pipes corresponding to the test benches in number, wherein each main air inlet pipe is connected with all the test benches respectively, and a flow regulating valve and an electric heater are arranged on each main air inlet pipe; at least three air inlet systems, the number of which is greater than that of the main air inlet pipes, wherein the multiple air inlet systems are connected with each other through at least one connecting pipe and form an air inlet module, and the air inlet module is provided with supply ports which are docked with the main air inlet pipes and correspond to the main air inlet pipes in number. The application has the advantages of compact and reasonable structure, convenient operation, realization of the air supply requirements of multiple combustion test benches through the combination of the multiple air inlet systems, realization of the parallel and switching functions of the multiple combustion test benches, accurate control of the air flow, rapid cooling of the combustion test bench and improvement of the work efficiency.

Description

Technical Field

[0001] This invention relates to the field of combustion test bench technology, and in particular to a high-temperature and high-pressure air supply system for a combustion test bench. Background Technology

[0002] Test benches play a crucial role in the field of energy and power engineering. These platforms delve into the coupling processes between flow and reaction in multi-atmosphere nozzles under high-temperature and high-pressure environments, as well as the related pollutant emission characteristics. Their core objective is to develop advanced combustion technologies that are multi-fuel, highly efficient, and low-emission. As a core R&D platform for fuel nozzle design and optimization, it can simulate the various complex operating conditions faced by nozzles in real gas turbines or other combustion devices. Through this platform, researchers can systematically analyze the aerodynamic characteristics, heat transfer characteristics, and combustion behavior of nozzles, thereby gaining a comprehensive understanding of their ignition characteristics, emission performance, variable operating condition response, and adaptability to different fuels.

[0003] High-performance equipment such as gas turbines, turbochargers, and heat exchangers often employ multiple test benches operating in parallel to improve efficiency. In this context, in-depth research into the operation of each test bench is crucial. Using test benches not only significantly reduces the high costs associated with installing multiple nozzles in a full-size combustion chamber but also effectively mitigates potential risks to the gas turbine turbine machinery during experiments. Therefore, for relevant companies, these test benches are not only an important means of reducing R&D costs but also a key facility for improving R&D efficiency.

[0004] To further improve the efficiency and responsiveness of the R&D process, the rapid switching capabilities and parallel testing capabilities of the test bench have become the focus of research. This will help to further shorten the R&D cycle and accelerate the optimization process of burners, fuel nozzles, and flame tubes.

[0005] However, in practical applications, the test bench still faces a series of technical problems, including the following: 1. How to achieve parallel or switching functions of multiple test benches to adapt to different test requirements? Traditionally, each test bench corresponds to a separate air intake pipeline, and the air intake volume of the air intake pipeline is limited by the equipment model and power. Therefore, it is inconvenient to control the air intake volume when multiple test benches are in parallel or switched.

[0006] 2. How to improve the accuracy of high-temperature and high-pressure gas intake to improve the accuracy of the experiment.

[0007] 3. How to ensure the safety and stability of the experimental process and prevent possible accidents when conducting experiments under high temperature and high pressure environments.

[0008] Therefore, we propose a high-temperature and high-pressure air supply system for a combustion test bench and its operation method. Summary of the Invention

[0009] In response to the shortcomings of the existing production technology, the applicant provides a high-temperature and high-pressure air supply system for a combustion test bench, which meets the air supply requirements of multiple combustion test benches, enables parallel operation and switching of multiple combustion test benches, and can also precisely control the flow rate and cool down the combustion test benches.

[0010] The technical solution adopted in this invention is as follows: A high-temperature, high-pressure air supply system for a combustion test bench includes: At least two test benches; At least two main air intake pipes are provided, the number of which corresponds to the number of test benches. Each main air intake pipe is connected to all test benches. Each main air intake pipe is equipped with a flow regulating valve and an electric heater to supply a fixed amount of high-temperature gas to the test benches. There are at least three intake systems, the number of which is greater than the number of main intake pipes. Each intake system can independently provide high-pressure gas. The multiple intake systems are interconnected by at least one connecting pipe to form an intake module. The intake module is equipped with supply ports that are connected to the main intake pipes in a corresponding number, for supplying gas to the multiple main intake pipes respectively.

[0011] Furthermore, the main intake pipe is equipped with a solenoid valve, a bypass valve, a mass flow meter, a flow regulating valve, an electric heater, and a three-way solenoid valve in sequence from the intake system end, in order to regulate and heat the air flow and achieve a quantitative supply of high-temperature and high-pressure gas.

[0012] Furthermore, at least one of the main air intake pipes is also provided with a bypass air intake pipe, and a mass flow controller is connected to the bypass air intake pipe for controlling the small flow rate of gas.

[0013] Furthermore, the side intake pipe is divided into two branches after passing through the flow controller, and each branch is equipped with a solenoid valve. One branch is connected to multiple other main intake pipes and passes through an electric heater, while the other branch is connected to multiple test benches through a three-way solenoid valve.

[0014] Furthermore, the air intake system is sequentially connected to an air compressor, a refrigerated dryer, an air tank, a filter, and a hand valve to provide stable, high-pressure, and clean air, with the connecting pipe located at the rear end of the hand valve.

[0015] Furthermore, each of the aforementioned pipes is equipped with a solenoid valve.

[0016] Furthermore, the electric heaters of the two main intake pipes are connected to the same generator.

[0017] Furthermore, the multiple intake systems are divided into the same number of groups as the main intake pipes, and each group of intake systems corresponds one-to-one with multiple main intake pipes. The intake systems in each group are interconnected, and adjacent groups of intake systems are interconnected.

[0018] Furthermore, when the number of intake systems is twice or more than the number of main intake pipes, each main intake pipe corresponds to at least two intake systems, and the number of intake systems in each group is evenly distributed.

[0019] An operating method for a high-temperature, high-pressure air supply system for a combustion test bench, employing the supply system described above, including: When the amount of gas provided by the intake system in each group is sufficient to meet the testing requirements of the corresponding test bench, the solenoid valve in the group and the solenoid valve of the corresponding main intake pipe will be opened to supply gas, enabling multiple test benches to conduct parallel tests. When the gas supply provided by the intake system in one group cannot meet the testing requirements of the corresponding test bench, and the intake system of the adjacent group can meet the corresponding supply requirements as well as the supply requirements of this group, the solenoid valve of the adjacent group will be opened to supplement the gas of the adjacent group into this group, so as to meet the testing requirements of the corresponding test bench of this group. When the gas volume provided by two or more adjacent air intake systems cannot meet the test requirements of the corresponding test bench, the air intake volume is combined by opening the solenoid valves of this group and one or more adjacent groups. At the same time, the adjacent test benches are cut off by a three-way valve, so that the gas is only supplied to this group to meet the test requirements of this group and realize the switching of test benches.

[0020] The beneficial effects of this invention are as follows: This invention features a compact and reasonable structure and is easy to operate. By combining multiple air intake systems with a series of precision sensors and actuators, it meets the air supply requirements of multiple combustion test benches. It can also achieve parallel operation and switching of multiple combustion test benches, as well as precisely control the flow rate and perform functions such as cooling the combustion test benches, fuel atomization assistance, and combustion organization, thereby improving work efficiency.

[0021] In addition, the present invention also has the following advantages: 1. This system, through the precise coordination of the control system and solenoid valves, enables rapid switching between multiple test benches or simultaneous testing. This design significantly shortens test preparation time, improves test efficiency, further enhances the parallelism and efficiency of testing, and substantially reduces the development cycle and cost of combustion equipment.

[0022] 2. During the experiment, the system achieves precise control of airflow through the coordinated operation of the bypass valve, flow regulating valve, and mass flow controller. The bypass valve and flow regulating valve perform coarse and fine adjustments to the flow rate, respectively, while the mass flow controller provides more precise flow control and measurement functions. This design ensures the stability and repeatability of the test conditions, improving the reliability and repeatability of the test data.

[0023] 3. After the test, the system cools the electric heater via a specific combination of solenoid valves, eliminating the need for the test bench. This design not only accelerates the cooling of the heating equipment but also shortens the test completion process, reducing time and labor costs, and improving the overall system safety. Furthermore, the direct venting of cooling to the atmosphere avoids residual heat within the test bench from affecting subsequent tests, further enhancing safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the system flow of the present invention.

[0025] in: 1. First air compressor; 2. Second air compressor; 3. Third air compressor; 4. First refrigerated dryer; 5. Second refrigerated dryer; 6. Third refrigerated dryer; 7. First air tank; 8. Second air tank; 9. Third air tank; 10. First filter; 11. Second filter; 12. Third filter; 13. First pressure reducing valve; 14. Second pressure reducing valve; 15. Third pressure reducing valve; 16. First manual valve; 17. Second manual valve; 18. Third manual valve; 19. First solenoid valve; 20. Second solenoid valve; 21. Third solenoid valve; 22. Fourth solenoid valve; 23. Fifth solenoid valve; 24. First pressure sensor; 25. Second pressure sensor; 26. Third pressure sensor; 27. Sixth solenoid valve; 28. Seventh solenoid valve; 29. ​​First thermocouple; 3 0. Second thermocouple; 31. First bypass valve; 32. Second bypass valve; 33. First mass flow meter; 34. Second mass flow meter; 35. Mass flow controller; 36. First flow regulating valve; 37. Second flow regulating valve; 38. Eighth solenoid valve; 39. Ninth solenoid valve; 40. Tenth solenoid valve; 41. Eleventh solenoid valve; 42. First electric heater; 43. Generator; 44. Second electric heater; 45. Third thermocouple; 46. Fourth thermocouple; 47. Fifth thermocouple; 48. Fourth pressure sensor; 49. Fifth pressure sensor; 50. Sixth pressure sensor; 51. First three-way solenoid valve; 52. Second three-way solenoid valve; 53. Third three-way solenoid valve; 54. First test bench; 55. Second test bench. Detailed Implementation

[0026] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments in this application, the term "and / or" merely describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following associated objects are in an "or" relationship.

[0031] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0032] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] As described in the background section, improving the efficiency and response speed of the R&D process and implementing multiple test benches are necessary technical means to improve efficiency. At the same time, how to ensure the rapid switching function and parallel testing capability of multiple test benches has become the focus of research.

[0035] Based on the above considerations, in order to solve the problems encountered by traditional test benches in parallel operation and switching, namely, that the test benches cannot meet the requirements of parallel operation and switching due to limited air intake, in other words, when multiple test benches require a large air intake, the individual air intake pipe of each test bench usually cannot meet its air intake, and multiple air intake pipes need to be used for supply. In this case, traditional test benches cannot achieve parallel operation and can only switch, and switching requires additional control of air intake, which increases the difficulty of operation and reduces the accuracy of the test.

[0036] Please see Figure 1 According to some embodiments of this application, a high-temperature and high-pressure air supply system for a combustion test bench is provided. Through the close cooperation of multiple air intake systems, sensors and control systems, the system realizes rapid switching between two test benches and supports simultaneous testing, which greatly improves the efficiency and flexibility of combustion testing.

[0037] The high-temperature and high-pressure air supply system of the combustion test bench in this embodiment includes: At least two test stands are required for conducting combustion tests; At least two main air intake pipes are provided, the number of which corresponds to the number of test benches. Each main air intake pipe is connected to all test benches. Each main air intake pipe is equipped with a flow regulating valve and an electric heater to supply a fixed amount of high-temperature gas to the test benches. There are at least three intake systems, the number of which is greater than the number of main intake pipes. Each intake system can independently provide high-pressure gas. The multiple intake systems are interconnected by at least one connecting pipe to form an intake module. The intake module is equipped with supply ports that are connected to the main intake pipes in a corresponding number, for supplying gas to the multiple main intake pipes respectively.

[0038] At least one main intake pipe is also equipped with a side intake pipe, which is connected to a mass flow controller for controlling small flow rates of gas.

[0039] In this embodiment, each pipe is equipped with a solenoid valve.

[0040] In another embodiment, in order to make the supply of multiple test benches more uniform, the multiple air intake systems are divided into the same number of groups as the main air intake pipes, and each group of air intake systems corresponds one-to-one with multiple main air intake pipes. Each air intake system in each group is interconnected, and adjacent groups of air intake systems are interconnected.

[0041] When the number of intake systems is twice or more than the number of main intake pipes, each main intake pipe corresponds to at least two intake systems, and the number of intake systems in each group is evenly distributed, so as to ensure that each test bench can meet the intake volume requirements and realize the parallel operation of multiple test benches.

[0042] Example 1 A high-temperature and high-pressure air supply system for a combustion test bench, such as Figure 1 As shown, in this embodiment, two test benches are used as an example. In this embodiment, two main air intake pipes are provided, which correspond to the first test bench 54 and the second test bench 55 respectively. In this field, the two test benches can basically meet the existing needs. And multiple air intake systems that connect to the main air intake duct. The air intake systems are used to provide stable, high-pressure and clean air to the main air intake duct. In this embodiment, four air intake systems are used as an example. Each main intake pipe corresponds to at least one intake system. In other words, at least one intake system is connected to each main intake pipe at the same time to supply air into the main intake pipe. This can overcome the situation where a single intake system in the test bench cannot meet the intake requirements. Each main intake pipe is equipped with, starting from the intake system end, a solenoid valve (sixth solenoid valve 27, seventh solenoid valve 28), a bypass valve (first bypass valve 31, second bypass valve 32), a mass flow meter (first mass flow meter 33, second mass flow meter), a flow regulating valve (first flow regulating valve 36, second flow regulating valve 37), an electric heater (first electric heater 42, second electric heater 44), and a three-way solenoid valve (first three-way solenoid valve 51, second three-way solenoid valve 52). These valves can regulate the air flow and heat the gas simultaneously to produce a quantitative amount of high-temperature and high-pressure gas, meeting the requirements of high-temperature and high-pressure combustion tests. Furthermore, the electric heaters of the two main intake pipes are connected to the same generator 43; At least several main air intake pipes are also equipped with side air intake pipes, and mass flow controllers 35 are connected to the side air intake pipes. Mass flow controllers 35 can control small flow rates of gas. Unlike flow regulating valves, which can control large flow rates of gas, the side air intake pipes can achieve fine-tuning of the gas flow, providing precise small flow rates of gas to meet the experimental requirements of the test bench. At the same time, they can also cool down the heater after the test bench has completed the experiment.

[0043] Therefore, the side intake pipe is divided into two branches after passing through the flow controller 35, and each branch is equipped with a solenoid valve. One branch is connected to another main intake pipe (not the branched main intake pipe) and passes through an electric heater. Then, it is connected to two test benches through the first three-way solenoid valve 51. The other branch is also connected to two test benches through the third three-way solenoid valve 53.

[0044] Therefore, it can meet the heating function of the side intake pipe, meet the test requirements of the test bench, and at the same time, it can cool specific components, assist fuel nozzle atomization, and organize combustion in the combustion chamber head without going through an electric heater.

[0045] intake system This system comprises multiple independent air intake systems, each consisting of key components such as an air compressor, refrigerated dryer, air tank, filter, manual valve, and solenoid valve. These components work together to provide the system with stable, high-pressure, and clean air.

[0046] Meanwhile, multiple intake systems are located in multiple groups with the same number of main intake pipes. In this embodiment, there are two main intake pipes, that is, multiple intake systems are divided into two groups. At the same time, the intake systems on the same side are divided into one group with the center line of the two main intake pipes as the boundary. Multiple intake systems in the same group are connected to the main intake pipes through at least one connecting pipe, and each connecting pipe is equipped with a solenoid valve. Specifically, in this embodiment, the air compressors—first, second, and third air compressors 1, 2, and 3—are the core power source of the system, capable of providing stable, high-pressure air. The total air supply of the multiple air compressors is designed to meet the maximum air demand of the two test benches, ensuring that the test benches have sufficient air supply for high-temperature, high-pressure combustion tests.

[0047] Refrigerated air dryers: The first, second, and third refrigerated air dryers 4, 5, and 6 are used in conjunction with air compressors to effectively remove moisture from compressed air, ensure the dryness of the air, and prevent test errors or equipment damage caused by moisture.

[0048] Air tanks: The first, second, and third air tanks 7, 8, and 9 play a role in stabilizing air pressure. They can adapt to the instant start and stop characteristics of the air compressor, ensuring that the air pressure fluctuates within a certain range and providing a stable air supply for the test.

[0049] Filters: The first, second, and third filters 10, 11, and 12 are responsible for filtering oil mist generated by the air compressor in the air flow channel as well as various impurities in the air, ensuring the air quality supplied to the test bench.

[0050] Manual valves and solenoid valves are key to system control. They allow for manual shut-off of the gas supply in case of solenoid valve failure, ensuring system safety.

[0051] The first, second, and third manual valves 16, 17, and 18 are located on each intake system and control the opening and closing of each intake pipe through manual control.

[0052] Solenoid valves: The first, second, and third solenoid valves 19, 20, and 21 are also located on each intake system and control the opening and closing of the pipeline through electronic control.

[0053] The fourth and fifth solenoid valves 22 and 23 are located on the connecting pipeline, controlling the gas connection between each intake system and the main intake pipeline; The sixth and seventh solenoid valves, 27 and 28, are located on the main intake pipe and control the opening and closing of the main intake pipe.

[0054] These multiple air intake systems operate independently of each other, yet can work together through a control system to provide a flexible and reliable air supply for combustion tests.

[0055] Control systems and sensors To ensure the accuracy and safety of the tests, this system is equipped with a sophisticated control system and various sensors. The control system receives real-time data from the sensors and precisely controls the air supply to meet the needs of different tests.

[0056] Pressure sensors: The first, second, and third pressure sensors 24, 25, and 26, as well as the fourth, fifth, and sixth pressure sensors 48, 49, and 50, are distributed in key parts of the system to monitor air pressure in real time and ensure that the pressure is within the set range.

[0057] Thermocouples: The first, second, third, fourth, and fifth thermocouples 29, 30, 45, 46, and 47 are used to measure the temperature of critical parts of the system to prevent equipment damage or test errors caused by excessive temperature.

[0058] Mass flow meters: The first and second mass flow meters 33 and 34, and the mass flow controller 35 provide accurate flow measurement and control functions. They ensure that the air flow supplied to the test bench is stable and meets the test requirements.

[0059] Solenoid valves and valve control The sixth and seventh solenoid valves 27 and 28 and the eighth, ninth, tenth and eleventh solenoid valves 38, 39, 40 and 41 work together to enable rapid switching or simultaneous testing of the two sets of test benches 54 and 55.

[0060] The first, second, and third three-way solenoid valves 51, 52, and 53 meet the control requirements of three-way air supply, including two main air supply lines and one auxiliary air supply line. They are key components for enabling rapid switching and simultaneous testing on the test bench.

[0061] The first and second bypass valves 31 and 32 are used for coarse control of the main air, and work with the first and second flow regulating valves 36 and 37 to achieve finer flow control. The mass flow controller 35 is responsible for the fine control of the auxiliary air.

[0062] Example 2 An operating method for a high-temperature and high-pressure air supply system of a combustion test bench, the specific operating method including: 1. When the gas supply provided by the air intake system in each group is sufficient to meet the testing requirements of the corresponding test bench, the solenoid valve in the group and the solenoid valve of the corresponding main air intake pipe will be opened to supply gas, thus enabling multiple test benches to conduct parallel tests. 2. When the gas supply provided by the intake system in one group cannot meet the testing requirements of the corresponding test bench, and the intake system of the adjacent group can meet the corresponding supply requirements as well as the supply requirements of this group, the solenoid valve of the adjacent group will be opened to supplement the gas of the adjacent group into this group, thereby meeting the testing requirements of the corresponding test bench of this group. 3. When the gas volume provided by two or more adjacent air intake systems cannot meet the test requirements of the corresponding test bench, the air intake volume is combined by opening the solenoid valves of this group and one or more adjacent groups. At the same time, the adjacent test benches are cut off by the three-way valve, so that the gas is only supplemented to this group to meet the test requirements of this group. This system, through the precise coordination of the control system and solenoid valves, enables rapid switching between multiple test benches or simultaneous testing. This design significantly shortens test preparation time, improves test efficiency, and further enhances the parallelism and efficiency of the tests.

[0063] 4. When fine-tuning of the flow rate is required during the test, the gas can be delivered at a small flow rate by opening the solenoid valve of the side air inlet pipe and using the mass flow controller. This allows for fine-tuning of the gas volume. Furthermore, opening the corresponding solenoid valve can heat this portion of gas, providing a small flow rate of high-temperature, high-pressure gas, thereby improving the accuracy of the test.

[0064] During the experiment, the system achieves precise control of airflow through the coordinated operation of a bypass valve, a flow regulating valve, and a mass flow controller. The bypass valve and flow regulating valve perform coarse and fine adjustments to the flow rate, respectively, while the mass flow controller provides more precise flow control and measurement functions. This design ensures the stability and repeatability of the test conditions and improves the reliability of the test data.

[0065] 5. When cooling is required after the test, the solenoid valve and three-way valve on the side air intake pipe are opened to supply a small flow of gas to the corresponding test bench without passing through the electric heater, thereby achieving the cooling effect.

[0066] After the test, the system cools the electric heater via a specific combination of solenoid valves, bypassing the test bench. This design not only accelerates the cooling process and shortens the test cycle but also improves the overall system safety. Furthermore, the direct venting of heat to the atmosphere prevents residual heat from affecting subsequent tests.

[0067] In summary, this invention achieves the gas supply requirements of multiple combustion test benches by combining multiple air intake systems with a series of precision sensors and actuators. It also enables parallel operation and switching of multiple combustion test benches, precise flow control, and rapid cooling of the combustion test benches, thereby improving work efficiency.

[0068] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A high-temperature and high-pressure air supply system for a combustion test bench, characterized in that, include: At least two test benches; At least two main air intake pipes, the number of which corresponds to the number of test benches, and each main air intake pipe is connected to all test benches to supply a fixed amount of high-temperature and high-pressure gas to the test benches. At least three air intake systems, more than the number of main air intake pipes, are provided. Each air intake system can independently provide high-pressure gas. Multiple air intake systems are interconnected via at least one connecting pipe to form an air intake module. Each air intake module has a corresponding number of supply ports that connect to the main air intake pipes, used to supply gas to the multiple main air intake pipes. Starting from the air intake system end, each main air intake pipe is sequentially equipped with a solenoid valve, a bypass valve, a mass flow meter, a flow regulating valve, an electric heater, and a three-way solenoid valve to regulate, heat, and distribute the airflow, achieving a quantitative supply of high-temperature, high-pressure gas. At least one... The main intake pipe is also equipped with a bypass intake pipe, which is connected to a mass flow controller for controlling the small flow rate of air. After passing through the mass flow controller, the bypass intake pipe splits into two branches, each equipped with a solenoid valve. One branch connects to several other main intake pipes and passes through an electric heater, while the other branch connects to several test benches via a three-way solenoid valve. The intake system is sequentially connected to an air compressor, a refrigerated dryer, an air tank, a filter, and a manual valve to provide stable, ambient temperature, high pressure, and clean air, with the connecting pipe located at the rear end of the manual valve.

2. The high-temperature and high-pressure air supply system for a combustion test bench as described in claim 1, characterized in that: Each of the aforementioned intake systems is equipped with a solenoid valve.

3. The high-temperature and high-pressure air supply system for a combustion test bench as described in claim 2, characterized in that: The electric heaters of the two main intake pipes are connected to the same generator.

4. The high-temperature and high-pressure air supply system for a combustion test bench as described in claim 3, characterized in that: The multiple intake systems are divided into the same number of groups as the main intake pipes, and each group of intake systems corresponds one-to-one with multiple main intake pipes. The intake systems in each group are interconnected, and adjacent groups of intake systems are interconnected.

5. The high-temperature and high-pressure air supply system for a combustion test bench as described in claim 4, characterized in that: When the number of intake systems is twice or more than the number of main intake pipes, each main intake pipe corresponds to at least two intake systems, and the number of intake systems in each group is evenly distributed.

6. An operating method for a high-temperature and high-pressure air supply system of a combustion test bench, characterized in that: The supply system employing claims 4 or 5 above includes: When the amount of gas provided by the intake system in each group is sufficient to meet the testing requirements of the corresponding test bench, the solenoid valve in the group and the solenoid valve of the corresponding main intake pipe will be opened to supply gas, enabling multiple test benches to conduct parallel tests. When the gas supply provided by the intake system in one group cannot meet the test requirements of the corresponding test bench, and the intake system of the adjacent group can meet the corresponding supply requirements as well as the supply requirements of this group, the solenoid valve of the adjacent group will be opened to supplement the gas of the adjacent group into this group to meet the test requirements of the corresponding test bench. When the gas volume provided by two or more adjacent air intake systems cannot meet the test requirements of the corresponding test bench, the solenoid valves of this group and one or more adjacent groups are opened to combine the air intake volume. At the same time, the adjacent one or more corresponding test benches are cut off through the three-way valve, so that the gas is only supplemented to this group to meet the test requirements of this group and realize the switching of test benches.

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