Numerical Investigations of the Coupled Flow Through a Subsonic Compressor Rotor and Axial Skewed Slot


          

刊名：Journal of Turbomachinery
作者：Xingen Lu（School of Power and Energy, Northwestern Polytechnical University, Xi'an, 710072, P.R.C. (xingenlu@hotmail.com)）
Wuli Chu
Junqiang Zhu
Yangfeng Zhang
刊号：784B0012
ISSN：0889-504X
出版年：2009
年卷期：2009, vol.131, no.1
页码：011001-1-011001-8
总页数：8
分类号：TK14
关键词：Compressor instability；Casing treatment；Tip clearance flow
参考中译：
语种：eng
文摘：In order to advance the understanding of the fundamental mechanisms of axial skewed slot casing treatment and their effects on the subsonic axial-flow compressor flow field, the coupled unsteady flow through a subsonic compressor rotor and the axial skewed slot was simulated with a state-of-the-art multiblock flow solver. The computational results were first compared with available measured data, that showed the numerical procedure calculates the overall effect of the axial skewed slot correctly. Then, the numerically obtained flow fields were interrogated to identify the physical mechanism responsible for improvement in stall margin of a modern subsonic axial-flow compressor rotor due to the discrete skewed slots. It was found that the axial skewed slot casing treatment can increase the stall margin of subsonic compressor by repositioning of the tip clearance flow trajectory further toward the trailing of the blade passage and retarding the movement of the incoming/tip clearance flow interface toward the rotor leading edge plane.



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