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	Analysis of the dominant frequency in a subsonic compressor stator at near stall condition
	Ke Shi ; Song Fu ; Ke Shi ; Song Fu
	2016-03-30 ; 2016-03-30
关键词	Hybrid RANS/LES Compressor stator Blade stall Leakage flow TH45
其他题名	Analysis of the dominant frequency in a subsonic compressor stator at near stall condition
中文摘要	IDDES method was applied to investigate the highly unsteady flow in a subsonic compressor stator with very large hub clearance and high incidence angle.The blade loading variation frequency was found close to the rotating instability(RI)frequency f RI&333 Hz observed in the experiment.Detailed analysis of the flow physics shows that the loading variation is caused by the periodic swing of the large scale separated flow on the blade suction side surface.The breakdown of the leakage vortex has no significant dominant frequencies,thus cannot be the cause of RI in this compressor stator as normally believed.Furthermore,the vortex shedding and vortex breakdown due to shear layer instability at the outer edge of the blade suction surface separation region excite high frequency unsteadiness that can form the sources of noise.; IDDES method was applied to investigate the highly unsteady flow in a subsonic compressor stator with very large hub clearance and high incidence angle. The blade loading variation frequency was found close to the rotating instability(RI) frequency f RI & 333 Hz observed in the experiment. Detailed analysis of the flow physics shows that the loading variation is caused by the periodic swing of the large scale separated flow on the blade suction side surface. The breakdown of the leakage vortex has no significant dominant frequencies, thus cannot be the cause of RI in this compressor stator as normally believed. Furthermore, the vortex shedding and vortex breakdown due to shear layer instability at the outer edge of the blade suction surface separation region excite high frequency unsteadiness that can form the sources of noise.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/143738]
专题	清华大学
推荐引用方式 GB/T 7714	Ke Shi,Song Fu,Ke Shi,et al. Analysis of the dominant frequency in a subsonic compressor stator at near stall condition[J],2016, 2016.
APA	Ke Shi,Song Fu,Ke Shi,&Song Fu.(2016).Analysis of the dominant frequency in a subsonic compressor stator at near stall condition..
MLA	Ke Shi,et al."Analysis of the dominant frequency in a subsonic compressor stator at near stall condition".(2016).

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