径向畸变条件下轴向缝机匣处理扩稳实验研究  

Axial Slot Casing Treatment for Stall Margin Improvement in an Axial Flow Compressor With Radial Distortion

作　　者：李益涵 李继超[1,2,3,4] 李帆 杜娟[1,2,3,4] 张宏武 聂超群[1,2,3,4] LI Yihan;LI Jichao;LI Fan;DU Juan;ZHANG Hongwu;NIE Chaoqun(Advanced Gas Turbine Laboratory,IET,CAS,Beijing 100190,China;Key Laboratory of Advanced Energy and Power,IET,CAS,Beijing 100190,China;Innovation Academy for Light-duty Gas Turbine,CAS,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院工程热物理研究所先进燃气轮机实验室,北京100190 [2]中国科学院先进能源动力重点实验室,北京100190 [3]中国科学院轻型动力创新研究院,北京100190 [4]中国科学院大学,北京100049

出　　处：《工程热物理学报》2022年第5期1210-1218,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金面上项目(No.51676184);国家自然科学基金重大科研仪器研制项目(No.51727810);国家科技重大专项(No.2017-II-0005-0018);国家科技重大专项(No.2017-II-0004-0017)。

摘　　要：本文针对低速单转子轴流压气机,通过实验手段研究了径向畸变条件下施加轴向缝机匣处理措施对压气机失速裕度及失速先兆演变特征的影响。稳态性能测量结果表明,在叶顶、叶中和叶根畸变条件下,轴向缝机匣处理均能消除畸变对失速裕度的负面影响,同时仍能推迟压气机失速。通过分析在转子前缘测得的非定常压力信号,可知,径向畸变不会改变压气机失速先兆类型,仍然为Spike失速先兆,且传播速度为65%~72%转子转速。当施加轴向缝机匣处理后,失速先兆尺度增大,传播速度降低至接近50%转子转速。失速过程功率谱密度分析结果表明,轴向缝机匣处理能够抑制失速前旋转失速频带附近扰动,进而推迟压气机失速,确保其抗畸变能力。In this paper, the effects of axial slot casing treatment on the stall margin and stall precursor under radial distorted inflow were experimentally studied in a low-speed single-rotor compressor. The steady measurement results showed that under tip, middle and hub radial distorted inflow, the axial slot casing treatment can eliminate the negative influence of distorted inflow on the stall margin, and it can still delay the occurrence of stall. The unsteady pressure signals measured at the leading edge of the rotor demonstrated that, the radial distortion cannot change the type of stall precursor, it is still spike-type stall precursor, its propagation speed is 65%~72% of rotor speed.When the axial slot casing treatment was adopted, the scale of the stall precursor increases, and the propagating speed of stall precursor approximates to 50% of rotor speed. The power spectral density of the stall process showed that the axial slot casing treatment can suppress the disturbance,whose frequency is around the rotating stall frequency band, thereby delaying stall and ensuring its anti-distortion ability.

关 键 词：压气机 进气畸变 轴向缝机匣处理 失速先兆 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]