引气提升轴流压气机性能的数值研究
Numerical research on enhancing the axial compressor performance by bleeding
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摘要: 以低速单级压气机为研究对象,根据引气对压气机性能的影响机理设计了6种引气方案,通过数值模拟,讨论了引气对压气机总压升、稳定裕度的影响.结果表明:对于角区大分离的静子,在靠近吸力面的机匣上和叶片吸力面近轮毂区域同时引气可以以较小的引气量获得压气机总压升和稳定工作裕度的全面提升.研究结论有力地支持了空气系统气源引气与压气机流动控制相结合的研究理念.Abstract: By analyzing the low-speed single-stage compressor,six different bleeding plans were presented according to their influence mechanism on the compressor performance.A numerical simulation was conducted to study the influence of bleeding on the compressors total pressure rise and stability margin.The results show that,for the stators with large flow separation in the corner,it is better to bleed air both from the suction surface of the casing and the blade suction surface near the hub simultaneously,so as to improve total pressure rise and stability margin with a small amount of bleed air.The conclusion steadily supports a concept that it is very necessary to combine air system bleeding with the compressor flow control during engine performance study.
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Key words:
- compressor /
- bleed air /
- total pressure rise /
- stability margin /
- air system
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