高负荷多级轴流压气机级间引气数值模拟

沙心国; 严明; 刘政良

高负荷多级轴流压气机级间引气数值模拟

1.
北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室, 北京 100191
2.
中国航天科技集团公司中国航天空气动力技术研究院, 北京 100074

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出版历程
- 收稿日期: 2012-10-30
- 刊出日期: 2013-11-28

Numerical simulation of inter-stage bleeding in highly-loaded multistage axial compressor

1.
National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2.
China Academy of Aerospace Aerodynamics, China Aerospace Science and Technology Corporation, Beijing 100074, China

摘要

摘要: 采用数值模拟的方法,以一台高负荷8级轴流压气机为研究对象,研究了级间引气对压气机总体性能、内部流场和级间匹配特性的影响.结果表明:级间引气可以显著提高压气机的总体性能,引气使得压气机进口流量增加近1%,最高效率提高约1.5%;引气会使引气位置处的压力降低,气流密度减小,从而使得引气位置上游的流量增加,转子最大载荷位置向下游移动,引气位置下游的流量减小,而转子最大负荷位置基本保持不变;引气还会使引气位置上下游各级的工作点位置发生变化,改变压气机的级间匹配特性.同时静子尾部机匣处引气还会使引气位置下游机匣处的附面层厚度减小,改变下游转子的进口条件.
- 多级轴流压气机 /
- 级间引气 /
- 内部流场 /
- 级间匹配 /
- 数值模拟
Abstract: Taking a highly-loaded eight-stage axial compressor as an object of research, the effect of inter-stage bleeding on compressor performance, inner flow-field and inter-stage matching in highly-loaded multistage axial compressor was investigated numerically. The result shows that inter-stage bleeding can significantly improve the compressor's performance. The bleeding results in 1% increase of the inlet mass flow and of 1.5% increase of the highest efficiency. In addition, the bleeding can decrease the pressure and density of air near the bleeding pores. This leads to an increase of mass flow upstream with the largest load position of rotors moving to downstream as well as a decrease of the mass flow downstream with the largest load position of rotors kept steady proximately. Moreover, bleeding contributes to change the working point position of stages in upstream and downstream of the bleeding position and alter the inter-stage matching of compressor. At the same time, bleeding at the trailing edge of stator could diminish thickness of boundary layer and change inlet condition of rotor downstream.
- multistage axial compressor /
- inter-stage bleeding /
- inner flow-field /
- inter-stage matching /
- numerical simulation

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参考文献(16)

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