A self-circulating multi-stage axial flow compressor

Abstract

The invention provides a novel self-circulation multi-stage axial flow compressor. The novel self-circulation multi-stage axial flow compressor comprises a machine case, a stator, a rotor and an air introduction pipeline for introducing air, wherein the air introduction pipeline is located on the machine case; an air introducing hole at one end of the air introduction pipeline is used for introducing the blade tip leakage vortex of the rotor; and the other end of the air introduction pipeline communicates with a main air blowing pipeline on the stator, so that air in the air introduction pipeline is blown out from an air blowing hole in the stator, and is used for blowing a vortex in the area of the stator away and making up for momentum loss at a wake area. By adopting the novel self-circulation multi-stage axial flow compressor, on the condition that influence on the pneumatic performance of the compressor is small, the stability margin of the compressor can be expanded, and stator / rotor interaction noise can be lowered; and meanwhile, the unsteady aerodynamic load of the surfaces of downstream blades is lowered.

Description

technical field [0001] The invention relates to the field of impeller machinery, in particular to a self-circulating multistage axial flow compressor. Background technique [0002] With the continuous development of the aviation industry, the performance requirements of aero-engines are getting higher and higher. In recent years, the design of high-load fans / compressors has become the focus of the industry. As we all know, there is a contradiction between the high load and wide operating range of the fan / compressor, and there is a higher requirement for expanding its stability margin. At the same time, the air system of the aero-engine needs to bleed air from the compression system for the cooling of the engine turbine, anti-icing of the inlet, air conditioning in the aircraft cabin, etc., so the influence of bleed air on performance needs to be considered. [0003] In addition, the increasingly serious aviation noise has attracted widespread attention, and aviation noise h...

AI Technical Summary

Problems solved by technology

However, the self-circulation and processing casings cannot consider the noise-related issues, and the trailing edge blowing requires a separate air source; at the same time, when the self-circulation bleed air of the multi-stage axial flow compressor needs to be arranged very complicated pipelines, the pipeline design and The layout will bring great difficulty, obviously need to design a more reasonable and reliable self-circulation method

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