An axial flow compressor trailing edge circumferential air jet expansion device

Abstract

The invention discloses a stability enhancement device for circumferential air blowing of a tail edge of an axial flow compressor. An air blower is mounted on a tail edge of a blade, and flow direction of jet stream is consistent with the rotation direction of a rotor; the air blower comprises a suction force surface and a pressure surface, and the pressure surface rotates anticlockwise by 1.48 degrees along the axial direction; the bottom of the air blower is mounted on a cartridge receiver at 10% of axial chord length of the downstream part of the tail edge of a blade top of the rotor, an air blower outlet is tangent to the surface of the cartridge receiver of the blade top of the rotor, the circumferential span of the air blower is 1.48 degrees, the axial distance of the air blower is 1.5mm, and an included angle between an air blower outlet and the circumferential direction is 0 degree; and an air blower inlet is communicated with an external air source, and the air blower is in threaded connection with the wall of the cartridge receiver. The air is circumferentially blown to the tail edge of the blade through the air blower, and the countercurrent flow of the tail edge of the blade is inhibited through high-speed fluid, so that the flow area of the axial flow compressor is increased; and a main stream can relatively smoothly flow to the downstream, so that the delayed stall is avoided, the stability margin of the axial flow compressor is increased, and the working efficiency of the axial flow compressor is improved.

Description

technical field [0001] The invention relates to an axial-flow compressor stabilization technology, in particular to a circumferential jet stabilization device at the trailing edge of an axial-flow compressor. Background technique [0002] With the help of the strong impact of high-speed air flow, the blade tip jet rapidly reduces the range of the low-energy area in the blade tip area, so as to increase the stability margin of the compressor. Tip jets are divided into active jets and passive jets. No matter what kind of air injection method is adopted, the improvement of the stability margin of the compressor is obvious. [0003] In recent years, many important research results have been obtained on tip jetting, which is enough to show that tip jetting technology has broad application prospects in the field of future aero-engine stability expansion. The document "Compressor Stability Enhancement Using Discrete Tip Injection Proceedings of ASME Turbo expo 2000, May 8-11, 200...

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Problems solved by technology

The document "Compressor Stability Enhancement Using Discrete Tip Injection Proceedings of ASME Turbo expo 2000, May 8-11, 2000, Munich Germany, 2000-GT-650" discloses a variety of solutions for tip injection. The document is on the axial flow compressor, By optimizing the parameters of the nozzle, several key factors affecting the effect of stability expansion have been determined, and a good effect of stability expansion has been achieved, but the literature research is only on the axial jet of the leading edge

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