A test system for engine temperature and pressure combination distortion

Abstract

The application discloses an engine temperature and pressure combined distortion test system, which comprises a test system capable of providing a stable temperature and different pressure distortion gas field combination for an engine. Gas is introduced into a jet ring from an electric regulating valve A and then introduced into a process pipeline to provide a stable temperature field environment for the engine. An electric regulating valve B with high pressure is opened instantaneously to flow into the process pipeline to provide temperature distortion for the engine. A combination of the plug distortion device generates pressure distortion in the process pipeline to form temperature and pressure combined distortion, thereby solving the problem that only the main intake valve control intake cannot realize the combination of stable temperature and pressure distortion.

Description

Technical Field

[0001] This invention relates to a test system for combined temperature and pressure distortion of an engine, belonging to the field of aero-engine test technology. Background Technology

[0002] Engine availability margin and inlet flow field distortion conditions are two key factors determining engine operational stability. The engine's stable operating capability is typically reflected by the ratio of its available stability margin to the critical inlet distortion intensity. Therefore, studying engine operational stability first requires determining the magnitude of the critical inlet distortion intensity. Inlet flow field distortion has a significant impact on the aerodynamic stability of aero-engines, and the effect of combined inlet pressure and temperature distortion on engine stability differs from the effect of temperature and pressure distortion alone.

[0003] Existing test systems that simulate distorted engines, such as Chinese Patent Publication No. CN114435625B, disclose the following technology: the inlet end of the main intake pipe is connected to the outlet end of the intake pipe, and a main intake valve is installed on it; the inlet end of the S-shaped nozzle is connected to the outlet end of the main intake pipe through a loose flange; the main nozzle is connected to the outlet end of the S-shaped nozzle through a loose flange, facing the inlet of the engine's main intake duct; although the main nozzle can control the intake intensity through the main intake valve, it cannot achieve a combination with pressure distortion at a stable temperature. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a test system for combined temperature and pressure distortion of an engine.

[0005] The present invention is achieved through the following technical solutions.

[0006] This invention provides a test system for combined temperature and pressure distortion of an engine, comprising:

[0007] It can provide a test system for engines under stable temperature and different pressure distortion gas field combinations.

[0008] Includes: process piping;

[0009] The engine being tested is located at the rear end of the exhaust port of the process pipeline.

[0010] The jet ring is installed at the front end of the air inlet of the process pipeline. The nozzle interface of the jet ring is connected to electric regulating valve A and electric regulating valve B. Electric regulating valve A and electric regulating valve B are connected to different nozzles on the jet ring.

[0011] A baffle distortion device is installed in the middle of the process pipeline; an AIP measuring device is installed at the outlet of the process pipeline near the engine.

[0012] The inlets of the electric regulating valves A and B are connected to a preheating pipe, and the end of the preheating pipe is connected to the parallel electric regulating valves C and D. The outlets of the electric regulating valves C and D are connected to the process pipeline located at the rear end of the plate distortion device.

[0013] The inlet of the preheating pipe, electric regulating valve A, and electric regulating valve B is connected to a temperature gauge A and a pressure gauge A. The inlet of pressure gauge A is connected in parallel to a high-temperature quick-opening valve A and a preheating bypass valve.

[0014] The high-temperature quick-opening valve A and the preheating bypass valve inlet are sequentially connected to a flow meter and a filter. A safety valve is installed between the flow meter and the filter. The safety valve's safety outlet is connected to a safety discharge pipe. An ejector tube is installed at the end of the safety discharge pipe. The ejector tube is installed at the rear end of the engine corresponding to the exhaust port of the process pipeline.

[0015] The filter inlet is sequentially connected to pressure gauge B and a high-temperature air intake regulating valve assembly.

[0016] An exhaust pipeline is connected in parallel at the inlet of the high-temperature intake regulating valve group. A pressure gauge C, a flow meter B, a thermometer B, a high-temperature quick-opening valve B, a high-temperature regulating valve, and a high-temperature regulating exhaust regulating valve are installed on the exhaust pipeline. The high-temperature regulating valve and the high-temperature regulating exhaust regulating valve are connected in parallel.

[0017] The exhaust pipeline and the high-temperature intake regulating valve group are connected to a combustion tester, which can provide high-temperature and high-pressure gas to the exhaust pipeline and the high-temperature intake regulating valve group in real time.

[0018] The beneficial effects of this invention are as follows: after the gas is introduced into the jet ring from the electric regulating valve A, it is directed to the process pipeline to provide a stable temperature field environment for the engine. The electric regulating valve B, which is under high pressure, opens instantaneously and flows into the process pipeline to provide temperature distortion for the engine. Combined with the plate distortion device, pressure distortion is generated in the process pipeline to form a combined temperature and pressure distortion, thus solving the problem that using only the main intake valve to control the intake cannot achieve a combination of stable temperature and pressure distortion. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the system distribution of the present invention;

[0020] In the diagram: 3-Process piping; 4-Engine; 5-Injector plate distortion device; 6-AIP measuring device; 7-Ejector tube; 8-Combustion test apparatus;

[0021] 11-Jet ring; 12-Electric regulating valve A; 13-Electric regulating valve B; 14-Preheating pipe; 141-Electric regulating valve C; 142-Electric regulating valve D; 15-Thermometer A; 16-Pressure gauge A; 17-High-temperature quick-opening valve A; 18-Preheating bypass valve; 19-Flow meter; 20-Filter; 21-Safety discharge pipe; 22-Pressure gauge B; 23-High-temperature intake regulating valve assembly;

[0022] 31-Exhaust line; 32-Pressure gauge C; 33-Flow meter B; 34-Thermometer B; 35-High temperature quick-opening valve B; 36-High temperature regulating valve; 37-High temperature regulating exhaust regulating valve. Detailed Implementation

[0023] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0024] like Figure 1 As shown.

[0025] This application discloses a test system for combined temperature and pressure distortion of an engine, comprising:

[0026] A process pipe 3 for testing the engine 4 is installed at the rear end of the exhaust port. A jet ring 11 is installed at the front end of the process pipe 3. The nozzle interface of the jet ring 11 is connected to an electric regulating valve A12 and an electric regulating valve B13. The electric regulating valves A12 and B13 are connected to different nozzles on the jet ring 11. The jet ring 11 is an existing structure and will not be described in detail.

[0027] A plate distortion device 5 is installed in the middle of the process pipeline 3. The plate distortion device 5 is used to control the distortion state of the gas field environment entering the middle of the process pipeline 3. The plate distortion device 5 is existing technology and will not be described in detail here.

[0028] Gas flows from the electric regulating valve A12 into the jet ring 11 and then into the process pipeline 3 to provide a stable temperature field environment for the engine 4. The electric regulating valve B13, which is under high pressure, opens instantaneously and flows into the process pipeline 3 to provide temperature distortion for the engine 4. Combined with the pressure distortion generated in the process pipeline 3 by the insert plate distortion device 5, a temperature and pressure combined distortion is formed, which solves the problem that the combination of stable temperature and pressure distortion cannot be achieved by using only the main intake valve to control the intake.

[0029] An AIP (Air-Independent Propulsion) measuring device 6 is installed at the outlet of the process pipe 3 near the engine 4. The AIP measuring device 6 detects and verifies the flow field distribution at the outlet of the process pipe 3. The AIP measuring device 6 is prior art and will not be described further here.

[0030] The inlets of the electric regulating valves A12 and B13 are connected to a preheating pipe 14. The end of the preheating pipe 14 is connected to parallel electric regulating valves C141 and D142. The outlets of electric regulating valves C141 and D142 are connected to the process pipeline 3 located at the rear end of the insert plate distortion device 5. The engine 4 is preheated through electric regulating valves C141 and D142, and can be supplemented when the air field temperature and air field pressure at the insert plate distortion device 5 are insufficient. During supplementation, the outlets of electric regulating valves C141 and D142 are connected to a spray bar equipped with a nozzle, and the size and instantaneous opening speed of electric regulating valves C141 and D142 are controlled to supplement the air field temperature and air field pressure when they are insufficient.

[0031] The inlet of the preheating pipe 14, electric regulating valve A12, and electric regulating valve B13 is connected to a temperature gauge A15 and a pressure gauge A16. The inlet of pressure gauge A16 is connected in parallel to a high-temperature quick-opening valve A17 and a preheating bypass valve 18. When the engine 4 needs to be preheated, the high-temperature quick-opening valve A17, electric regulating valve A12, and electric regulating valve B13 are closed, while the preheating bypass valve 18, electric regulating valve C141, and electric regulating valve D142 are opened accordingly, thus enabling the engine 4 to be preheated.

[0032] The inlet of the high-temperature quick-opening valve A17 and the preheating bypass valve 18 are sequentially connected to a flow meter 19 and a filter 20. A safety valve is installed between the flow meter 19 and the filter 20. The safety valve's safety outlet is connected to a safety discharge pipe 21. An ejector tube 7 is installed at the end of the safety discharge pipe 21. The ejector tube 7 is installed at the rear end of the engine 4 at the exhaust port of the process pipeline 3.

[0033] The filter 20 inlet is sequentially connected to a pressure gauge B22 and a high-temperature air intake regulating valve group 23.

[0034] The high-temperature intake regulating valve group 23 has an exhaust pipeline 31 connected in parallel at the inlet. The exhaust pipeline 31 has a pressure gauge C32, a flow meter B33, a thermometer B34, a high-temperature quick-opening valve B35, a high-temperature regulating valve 36, and a high-temperature regulating exhaust regulating valve 37 connected in parallel.

[0035] The exhaust pipeline 3 and the high-temperature intake regulating valve group 23 are connected to a combustion tester 8. The combustion tester 8 can provide high-temperature and high-pressure gas to the exhaust pipeline 3 and the high-temperature intake regulating valve group 23 in real time. The high-temperature and high-pressure gas can be passed from the high-temperature intake regulating valve group 23 to the electric regulating valve A12 and the electric regulating valve B13 to control the opening size and opening speed of the electric regulating valve A12 and the electric regulating valve B13, so as to achieve different combinations of temperature and pressure distortion.

Claims

1. A test system for combined temperature and pressure distortion of an engine, characterized in that, include: It can provide a test system for the engine (4) under stable temperature and different pressure distortion gas field combinations; Includes: process piping (3); The engine (4) to be tested is located at the rear end of the exhaust port of the process pipe (3); The jet ring (11) is installed at the front end of the air inlet of the process pipeline (3). The nozzle interface of the jet ring (11) is connected to the electric regulating valve A (12) and the electric regulating valve B (13). The electric regulating valve A (12) and the electric regulating valve B (13) are connected to different nozzles on the jet ring (11). A baffle plate distortion device (5) is installed in the middle of the process pipeline (3); Gas flows from the electric regulating valve A (12) into the jet ring (11) and then into the process pipeline (3) to provide a stable temperature field environment for the engine (4). The electric regulating valve B (13) with high pressure opens instantly and flows into the process pipeline (3) to provide temperature distortion for the engine (4). Combined with the plate distortion device (5), pressure distortion is generated in the process pipeline (3) to form a temperature and pressure combination distortion.

2. The test system for engine temperature and pressure combination distortion as described in claim 1, characterized in that: An AIP measuring device (6) is installed at the outlet of the process pipe (3) near the engine (4).

3. The test system for engine temperature and pressure combination distortion as described in claim 1, characterized in that: The inlets of the electric regulating valves A (12) and B (13) are connected and then connected to a preheating pipe (14). The end of the preheating pipe (14) is connected to parallel electric regulating valves C (141) and D (142). The outlets of electric regulating valves C (141) and D (142) are connected to the process pipeline (3) located at the rear end of the insert plate distortion device (5).

4. The test system for engine temperature and pressure combination distortion as described in claim 3, characterized in that: The inlet of the preheating pipe (14), electric regulating valve A (12), and electric regulating valve B (13) is connected to a temperature gauge A (15) and a pressure gauge A (16). The inlet of pressure gauge A (16) is connected in parallel to a high-temperature quick-opening valve A (17) and a preheating bypass valve (18).

5. The test system for engine temperature and pressure combination distortion as described in claim 4, characterized in that: The inlet of the high-temperature quick-opening valve A (17) and the preheating bypass valve (18) are connected in sequence to a flow meter (19) and a filter (20). A safety valve is installed between the flow meter (19) and the filter (20). The safety outlet of the safety valve is connected to a safety discharge pipe (21). An ejector tube (7) is installed at the end of the safety discharge pipe (21). The ejector tube (7) is installed at the rear end of the engine (4) corresponding to the exhaust port of the process pipeline (3). The filter (20) inlet is sequentially connected to a pressure gauge B (22) and a high-temperature air intake regulating valve group (23).

6. The test system for engine temperature and pressure combination distortion as described in claim 5, characterized in that: The high-temperature intake regulating valve group (23) has an exhaust pipeline (31) connected in parallel at the inlet. The exhaust pipeline (31) is equipped with a pressure gauge C (32), a flow meter B (33), a thermometer B (34), a high-temperature quick-opening valve B (35), a high-temperature regulating valve (36), and a high-temperature regulating exhaust regulating valve (37). The high-temperature regulating valve (36) and the high-temperature regulating exhaust regulating valve (37) are connected in parallel.

7. The test system for engine temperature and pressure combination distortion as described in claim 6, characterized in that: The exhaust pipeline (31) and the high-temperature intake regulating valve group (23) are connected to a combustion tester (8), which can provide high-temperature and high-pressure gas to the exhaust pipeline (31) and the high-temperature intake regulating valve group (23) in real time.

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