Steady state and dynamic state component ratio-adjustable total pressure distortion generating device and method

Abstract

The invention discloses a steady state and dynamic component ratio-adjustable total pressure distortion generating device and method. The device comprises a steady-state total pressure distortion generator and a dynamic sate total pressure distortion generator which are sequentially installed in the inlet pipeline of an aerodynamic stability experiment along the flowing direction of airflow; the steady state total pressure distortion generator comprises a first bracket and a wire mesh, wherein the wire mesh is detachably mounted on the bracket; and the dynamic sate total pressure distortion generator comprises a second bracket, loudspeakers, and a junction box; a plurality of loudspeakers are adopted and are fixed on the second bracket; and the wires of the loudspeakers are led out to thejunction box. The steady state and dynamic component ratio-adjustable total pressure distortion generating device and method of the present invention are capable of generating single steady state or dynamic state total pressure distortion, and are also capable of generating steady state and dynamic state combined total pressure distortion; and the ratio of steady state components to dynamic statecomponents is adjustable.

Description

Technical field [0001] The invention belongs to a device for influencing the gas flow in the inlet pipe of an aero engine and a compressor, and belongs to the technical field of aerospace systems. Background technique [0002] The total pressure distortion refers to the uneven distribution of the total pressure at the outlet of the aero engine inlet or the inlet of the fan / compressor. The total pressure distortion can cause a variety of hazards, such as reducing the compressor's total pressure ratio and efficiency, reducing the stability margin, and threatening the flight safety of aircraft engines. To carry out experimental research in this area to evaluate the influence of total pressure distortion, it is necessary to have a device that simulates the total inlet pressure distortion. [0003] The total pressure distortion contains two components: steady-state component and dynamic component. When simulating total pressure distortion in Europe and the United States, a distortion ...

AI Technical Summary

Problems solved by technology

When the compressor is working, as the flow rate decreases, the operating points of the low-pressure compressor and the high-pressure compressor gradually approach the stable boundary. When the low-pressure compressor first enters the rotating stall state, while the high-pressure The inlet of the compressor will produce serious rotational total pressure distortion, which will reduce the stability margin of the high-pressure compressor, and may cause the entire engine to enter a rotational stall / surge state, causing serious consequences. Therefore, it is necessary to conduct research on the rotational total pressure distortion

At present, the simulation of rotating total pressure distortion mostly uses a rotating distortion net generator, which cannot simulate the dynamic component of total pressure distortion.

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