Turbine guider testing device

Abstract

The invention provides a turbine guider testing device comprising a main gas supply module used for adjusting and measuring main gas flow; the combustion heating module is connected to the downstream of the main gas supply module and comprises a combustion chamber and a throttling device arranged at an outlet of the combustion chamber; the flow field setting module is connected to the downstream of the combustion heating module and is used for carrying out flow field homogenization treatment on the high-temperature fuel gas; the guider test module comprises a guider test piece connected to the downstream of the flow field setting module and is used for installing a turbine guider to be tested; the cold air adjusting module comprises a cold air pipeline, a cold air inlet valve group, a cold air distribution tank, a multi-path cold air flow adjusting valve and a multi-path cold air flow orifice plate, the cold air distribution tank divides cold air into a plurality of independent channels, and the cold air flow is dynamically adjusted through the flow adjusting valve and the flow orifice plate of each channel; and the fuel oil control module is connected with the combustion chamber and comprises an oil supply pipeline, a main and auxiliary oil way fuel oil flow meter, a main and auxiliary oil way oil supply regulating valve and a proportional reversing valve.

Description

Technical Field

[0001] The present invention relates to the technical field of aeroengines / gas turbines, and particularly relates to a turbine guide vane test device. Background Art

[0002] The turbine guide vane is an important component of an aeroengine. For the whole engine, as the restricted cross-section of the engine flow rate, the guide vane is an important component for controlling the working point of the engine. For the turbine component of the engine, the outlet of the guide vane is the inlet cross-section of the turbine rotor. The exhaust gas velocity, angle, etc. are directly related to the flow condition of the air flow in the turbine rotor and are of great significance to the aerodynamic efficiency of the turbine.

[0003] Therefore, conducting guide vane tests can be closer to the actual flow condition inside the engine, and can also obtain guide vane performance parameters such as the angular velocity and angle of the outlet air flow of the guide vane and the loss characteristics of the guide vane, providing an important basis for the evaluation of aeroengines. At present, there are relatively few existing guide vane test devices in China. Most guide vane testers can conduct guide vane stream function tests under normal temperature conditions. The main gas temperature of the test device is usually not higher than 373K, and the adjustable range of the main gas temperature is relatively low, which cannot meet the same cold air temperature ratio and flow ratio as the prototype guide vane.

[0004] In high-temperature guide vane tests, it is usually required that the tester should adapt to the test requirements of guide vanes of different sizes, involve a relatively wide flow range, need to have the heating ability in a wide flow range, and at the same time, after heating, the non-uniform flow field adjustment at the outlet of the combustion chamber needs to be considered. The corresponding requirements increase the design difficulty of the high-temperature guide vane tester. Summary of the Invention

[0005] In view of this, the present invention provides a turbine guide vane test device to achieve the purpose of improving the flow rate adaptation range of the combustion chamber.

[0006] The present invention provides the following technical solutions: A turbine guide vane test device, comprising: a main gas supply module for adjusting and measuring the main gas flow rate; a combustion heating module connected downstream of the main gas supply module, including a combustion chamber and a throttling device provided at its outlet; a flow field rectifying module connected downstream of the combustion heating module for performing flow field homogenization treatment on the high-temperature gas; a guide vane test module including a guide vane test piece connected downstream of the flow field rectifying module for installing the turbine guide vane to be tested; a cold air regulating module including a cold air pipeline, a cold air inlet valve group, a cold air distribution tank, a plurality of cold air flow regulating valves and a plurality of cold air flow orifices, the cold air distribution tank divides the cold air into a plurality of independent channels, and dynamically adjusts the cold air flow rate through the flow regulating valves and flow orifices of each channel; a fuel control module connected to the combustion chamber, the fuel control module includes a fuel supply pipeline, main and secondary fuel flow meters, main and secondary fuel supply regulating valves and a proportional reversing valve; an exhaust gas regulation module connected downstream of the guide vane test piece for cooling the high-temperature gas and regulating the outlet pressure.

[0007] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted by the present invention at least include:

[0008] Compared with the commonly used test devices in the prior art, by means of throttling adjustment and combustion chamber heating, the range of the guide vane inlet temperature is expanded to 773K, the range of the guide vane volume flow rate is expanded to 10 times, and the cold air temperature ratio can reach as low as 0.38 at least, which can meet the requirements of the cold air temperature ratio of medium and large-sized guide vanes.

[0009] At the same time, the working state of the combustion chamber is effectively controlled through throttling adjustment, the combustion effect is stable and reliable during the test, and the combustion efficiency is relatively high; and through the rectification of the air inlet rectifying device and the function of the pressure stabilizing tank, the non-uniformity of the guide vane inlet flow field is less than 1%, ensuring the stability of the guide vane test inlet flow field, and the guide vane test data is valid and reliable. Description of the Drawings

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0011] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0012] 1. Main air duct; 2. Cold air duct; 3. Cold air intake valve group; 4. Main air intake valve group; 5. Cold air distribution tank; 6. Flow regulating valve; 7. Flow orifice; 8. High-precision flow orifice; 9. Combustion chamber; 10. Throttling device; 11. Intake air rectification device; 12. Pressure regulating box; 13. Test piece; 14. Exhaust cooling device; 15. Exhaust regulating valve group; 16. Oil supply pipeline; 17. Oil return pipeline; 18. Main and auxiliary oil circuit return valve; 19. Main and auxiliary oil circuit oil supply regulating valve; 20. Main and auxiliary oil circuit fuel flow meter; 21. Proportional reversing valve; 22. Exhaust duct. DETAILED DESCRIPTION

[0013] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0014] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0015] like Figure 1 As shown, the turbine guide vane test device according to the embodiment of the present invention includes the following core modules:

[0016] Main gas supply module: It consists of the main gas pipeline 1, the main gas intake valve group 4 and the high-precision flow orifice plate 8, and is used to adjust and measure the main gas flow. The main gas intake valve group 4 controls the opening through an electric or pneumatic actuator, and the high-precision flow orifice plate 8 adopts the differential pressure measurement principle.

[0017] Combustion and heating module: connected to the downstream of the main gas supply module, including a combustion chamber 9 and a throttling device 10. A premixing burner and a flame stabilizer are provided in the combustion chamber 9. The fuel oil and the main gas are mixed and fully burned, and the combustion efficiency is ≥ 98%. The throttling device 10 is an adjustable throttle valve, which controls the inlet pressure of the combustion chamber by adjusting the opening, so that the main gas flow rate can be continuously adjusted within the set range.

[0018] Flow field adjustment module: including air intake straightening device 11 and pressure stabilizing box 12. Air intake straightening device 11 adopts multi-layer honeycomb structure or guide grid to adjust the non-uniform flow field at the outlet of combustion chamber to a velocity distribution unevenness of <1%. The volume of pressure stabilizing box 12 is 6 times the cross-sectional area of the outlet of combustion chamber, and turbulence suppression plate is arranged inside to further eliminate pressure pulsation.

[0019] Guide valve test module: It includes a guide valve test piece 13 installed downstream of the pressure stabilizing tank 12, which is used to fix the turbine guide valve to be tested. Multiple groups of pressure and temperature sensors are set at the inlet and outlet of the test piece 13 to collect flow field data in real time.

[0020] Cooling air regulation module: It consists of a cooling air pipeline 2, a cooling air inlet valve group 3, a cooling air distribution tank 5, a multi-way cooling air flow regulating valve 6 and an orifice plate 7. The cooling air distribution tank 5 divides the cooling air into at least three independent branches, and the cooling air flow of each branch is dynamically regulated by the flow regulating valve 6 with high precision and the differential pressure type orifice plate 7 to meet the requirement that the ratio of the cooling air flow to the main air flow is ≥0.38.

[0021] Fuel control module: It includes a fuel supply pipeline 16, main and auxiliary fuel flow meters 20 for the fuel supply pipelines, main and auxiliary fuel supply regulating valves 19, a proportional reversing valve 21, a return oil pipeline 17 and main and auxiliary return oil valves 18 for the fuel supply pipelines. The main fuel supply pipeline is used for high-flow fuel supply, and the auxiliary fuel supply pipeline is used for fine adjustment, and seamless switching is achieved through the proportional reversing valve 21.

[0022] Exhaust gas regulation module: It consists of an exhaust gas cooling device 14, an exhaust gas regulating valve group 15 and an exhaust gas pipeline 22. The exhaust gas cooling device 14 adopts a water-cooled spiral tube structure to cool the high-temperature gas from 773K to below 400K; the exhaust gas regulating valve group 15 controls the isentropic Mach number at the outlet of the guide vane by adjusting the outlet static pressure.

[0023] Working process

[0024] Open the main air inlet valve group 4, adjust the opening degree to the target flow rate, and monitor the main air flow rate in real time through the high-precision orifice plate 8.

[0025] Fuel enters the main and auxiliary fuel supply pipelines through the fuel supply pipeline 16. The main or auxiliary fuel supply pipeline is selected according to the main air flow rate for fuel supply. The fuel pressure is controlled by the main and auxiliary fuel supply regulating valves 19 and the main and auxiliary return oil valves 18 for the fuel supply pipelines, and the fuel flow rate is accurately measured by the main and auxiliary fuel flow meters 20 for the fuel supply pipelines.

[0026] The fuel and the main air are mixed and burned in the combustion chamber 9 to generate high-temperature gas at 400K - 773K. The throttling device 10 adjusts the inlet pressure of the combustion chamber according to the flow rate demand, and expands the flow rate adaptation range to 10 times that of the normal temperature test device.

[0027] After the high-temperature gas is rectified by the intake air rectifying device 11 and the pressure stabilizing tank 12, the flow field non-uniformity is <1%. At the same time, the cooling air is distributed through multiple branches, and the flow regulating valves 6 of each branch are adjusted to match the cooling air flow rate with the main air flow rate.

[0028] The high-temperature gas and the cooling air are mixed in the guide vane test piece 13, and the total pressure, total temperature at the inlet, total pressure and total temperature at the outlet are measured through sensors, and the total pressure loss coefficient, velocity loss coefficient and energy loss coefficient are calculated.

[0029] The high-temperature gas after the test is cooled by the exhaust gas cooling device 14, and the outlet static pressure is adjusted by the exhaust gas regulating valve group 15 to ensure the stability of the test conditions.

[0030] It should be noted that:

[0031] Compressed air enters the device through the main air intake regulating valve. The main air flow rate is measured by a high-precision orifice plate. After being premixed with fuel in the combustion chamber, it burns into high-temperature gas. A throttling device is set at the outlet of the combustion chamber to change the inlet pressure of the combustion chamber and improve its flow rate adaptation range. A rectifying device is set behind the throttling device to rectify the non-uniform flow field at the outlet of the combustion chamber to ensure the uniform quality of the flow field at the inlet of the test guide vane. Finally, the high-temperature air of the test piece enters the exhaust cooling device for cooling and is discharged after passing through the exhaust regulating valve. During the test, the working state of the combustion chamber and the test state are matched and adjusted by matching and adjusting the throttling device and the exhaust regulating valve.

[0032] To adapt to a wide range of main air flow rates, the cooling air is also adjustable in multiple paths. Before the test, single-path or multi-path cold air is selected for adjustment according to the flow rate range requirements of the test piece. The adjustment is that compressed air enters through the cold air intake regulating valve, the cold air flow rate is measured by a flow meter or an orifice plate, and enters the test piece through the cold air collecting cavity of the test piece. By adjusting the cold air intake regulating valve, the ratio of the cold air flow rate of the guide vane to the main air flow rate is adjusted to meet the requirements of the cold air flow rate ratio.

[0033] At the same time, the fuel adopts a main and auxiliary oil circuit design. When heating, the main and auxiliary flow rates can be changed according to the main air flow rate range to adapt to the fuel supply pressure requirements. During the test, the fuel with a certain pressure in the main and auxiliary oil circuits enters the device through the fuel regulating valve, the fuel flow rate is measured by the fuel flow meter, and after being premixed with the main air in the combustion chamber, it burns fully. According to the fuel regulating valve, the pressure entering the combustion chamber is adjusted to change the fuel flow rate to control the total inlet temperature of the guide vane and the ratio of the total cold air temperature to the total inlet temperature to meet the requirements of the total inlet temperature and the cold air temperature ratio during the test.

[0034] The corresponding calculation method for the test performance of the guide vane is as follows. The main gas flow rate G0 through the guide vane is the sum of the main air flow rate G a and the fuel flow rate G f According to the main gas flow rate G0, the inlet total pressure P0 and the inlet total temperature T0 of the guide vane, the inlet reduced flow rate of the guide vane can be calculated According to the main gas flow rate G0, the inlet total pressure P0, the inlet total temperature T0, the cold air flow rate G c and the cold air temperature T c the throat reduced flow rate of the guide vane can be calculated According to the inlet total pressure P0, the inlet total temperature T0, the outlet total pressure P1, and the outlet total temperature T1, the total pressure loss coefficient, the velocity loss coefficient, and the energy loss coefficient of the guide vane can be calculated.

[0035] As described above, the above are only specific embodiments of the present invention, and the scope of implementation of the invention cannot be limited thereby. Therefore, the replacement of equivalent components or equivalent changes and modifications made according to the scope of protection of the present invention shall still fall within the scope covered by this patent. In addition, the technical features, technical features and technical solutions, and technical solutions and technical solutions in the present invention can be freely combined and used with each other.

Claims

1. A turbine guide vane test device, characterized in that Comprising: A main gas supply module for regulating and measuring the main gas flow rate; A combustion heating module connected downstream of the main gas supply module, including a combustion chamber (9) and a throttling device (10) provided at its outlet; A flow field rectification module connected downstream of the combustion heating module for performing flow field homogenization treatment on the high-temperature gas; A guide vane test module including a guide vane test piece (13) connected downstream of the flow field rectification module for installing a turbine guide vane to be tested; A cold air regulation module including a cold air pipeline (2), a cold air inlet valve group (3), a cold air distribution tank (5), a multi-channel cold air flow regulating valve (6) and a multi-channel cold air orifice plate (7), the cold air distribution tank (5) divides the cold air into multiple independent channels, and dynamically regulates the cold air flow rate through the flow regulating valves (6) and orifice plates (7) of each channel; A fuel control module connected to the combustion chamber (9), the fuel control module includes a fuel supply pipeline (16), a main and auxiliary oil circuit fuel flow meter (20), a main and auxiliary oil circuit fuel supply regulating valve (19) and a proportional reversing valve (21); An exhaust gas regulation module connected downstream of the guide vane test piece (13) for cooling the high-temperature gas and regulating the outlet pressure.

2. The turbine guide vane test device according to claim 1, characterized in that, The main gas supply module includes a main gas pipeline (1), a main gas inlet valve group (4) and a high-precision orifice plate (8) connected in sequence, and the high-precision orifice plate (8) is connected to the combustion chamber (9).

3. The turbine guide vane test device according to claim 2, wherein, The flow field rectification module includes an air inlet rectifying device (11) and a pressure stabilizing tank (12) arranged in sequence, and the air inlet rectifying device (11) is arranged downstream of the throttling device (10).

4. The turbine guide vane test device according to claim 3, characterized in that The fuel control module includes a fuel supply pipeline (16), a main and auxiliary oil circuit fuel flow meter (20), a main and auxiliary oil circuit fuel supply regulating valve (19) and a proportional reversing valve (21).

5. The turbine guide vane test device according to claim 4, characterized in that, The exhaust gas regulation module includes an exhaust gas cooling device (14) and an exhaust gas regulating valve group (15) connected downstream of the guide vane test piece (13).

6. The turbine guide vane test device according to claim 5, wherein, The exhaust gas regulation module further includes an exhaust gas pipeline (22) connected to the exhaust gas regulating valve group (15).

7. The turbine guide vane test device according to claim 6, characterized in that The cold air distribution tank (5) includes at least three independent cold air branches, and each branch is equipped with a high-precision cold air flow regulating valve (6) and a differential pressure type orifice plate (7).

8. The turbine guide vane test device according to claim 1, characterized in that The fuel control module further includes a return oil pipeline (17) and a main and auxiliary oil circuit return oil valve (18) for controlling the return oil flow rate.

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