基于互相关分析的前失速先兆检测分析

doi:10.7527/S1000-6893.2013.0004

流体力学、飞行力学与发动机

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基于互相关分析的前失速先兆检测分析

李继超^1,2, 童志庭¹, 聂超群¹, 林峰¹

1. 中国科学院工程热物理研究所, 北京 100190;
2. 中国科学院研究生院, 北京 100190

收稿日期:2012-01-10 修回日期:2012-02-20 出版日期:2013-01-25 发布日期:2013-01-19
通讯作者: 聂超群,Tel.:010-82543076,E-mail:ncq@iet.cn E-mail:ncq@iet.cn
作者简介:童志庭,男,博士,副研究员。主要研究方向:轴流压缩系统内部流动失稳机理及控制方法。Tel:010-82543147,Email:tongzhiting@iet.cn;聂超群,男,博士,研究员,博士生导师。主要研究方向:压气机内部流动失稳机理,非定常动态测试,流动失稳控制技术。Tel:010-82543076,Email:ncq@iet.cn;林峰,男,博士,研究员,博士生导师。主要研究方向:非线性转子动力学,压气机内部流动失稳机理研究,压气机系统辨识与建模。Tel:010-82543089,Email:linfeng@iet.cn
基金资助:
国家自然科学基金(51010007, 51006099)

Detection and Analysis of Early Stall Warning Based on Cross-correlation

LI Jichao^1,2, TONG Zhiting¹, NIE Chaoqun¹, LIN Feng¹

1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100190, China

Received:2012-01-10 Revised:2012-02-20 Online:2013-01-25 Published:2013-01-19
Contact: Ji-Chao Li E-mail:ncq@iet.cn
Supported by:
National Natural Science Foundation of China (51010007,51006099)

摘要/Abstract

摘要：

针对轴流压气机流动失稳控制中的反馈信号,采用互相关分析方法对前失速先兆信号进行了检测。通过在机匣壁面周向对称布置的动态传感器对压力信号进行检测分析,并在单转子低速轴流压气机上进行了实验研究。实验中分析了不同流量工况时,对称布置动态传感器压力信号互相关系数的变化趋势,并在此基础上对前失速先兆与叶顶间隙泄漏涡非定常性进行了关联性研究;同时也分析了采用叶顶喷气作为控制手段之后,机匣壁面对称布置传感器动态压力信号的互相关系数随着喷气量增加的变化趋势。实验结果表明:互相关检测分析方法能够有效及时地检测到壁面压力锯齿波的破坏程度,有利于提高控制器的响应速度,留给作动机构充足的反应时间。而且叶顶喷气作为控制手段能够提高对称布置传感器动态压力信号的互相关系数,从而实现拓宽稳定裕度的目的。

Abstract:

Cross-correlation is employed to analyze the pressure time-trace which is detected by the dynamic transducers arranged symmetrically around the casing of an axial compressor, and the experiment is performed in a low speed, single-rotor compressor. The tendency of variation of the cross-correlation coefficients is analyzed with different flow coefficients. The relevance of early stall warning and unsteadiness of tip leakage vortex is also studied, and the early stall warning is associated with the unsteadiness of the tip leakage vortex. When tip air injection is adopted as a control method, the correlation measurements will go up first, and then go down with the increase of the injected mass flow. The experimental results show that the controller can detect the destructiveness of the pressure time-trace earlier with the cross-correlation method, and the actuator can be operated timely to improve the stall margin. The feasibility of tip air injection as a control method is also demonstrated.

Key words: compressor, cross-correlation analysis, power spectrum density, early stall warning, unsteadiness of tip leakage vortex

中图分类号:

V231.3

李继超, 童志庭, 聂超群, 林峰. 基于互相关分析的前失速先兆检测分析[J]. 航空学报, 2013, 34(1): 28-36.

LI Jichao, TONG Zhiting, NIE Chaoqun, LIN Feng. Detection and Analysis of Early Stall Warning Based on Cross-correlation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(1): 28-36.

参考文献

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

基于互相关分析的前失速先兆检测分析

Detection and Analysis of Early Stall Warning Based on Cross-correlation

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