| Identification of vortices in a transonic compressor flow and the stall process |
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| 作者姓名： | HUANG Xu-dong CHEN Hai-xin FU Song David Wisler Aspi Wadi G. Scott McNulty |
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| 作者单位： | School of Aerospace，Tsinghua University，Beijing 100084;GE Aircraft Engines，Mail Drop A411，One Neumann Way，Cincinnati，OH 45215，USA |
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| 摘 要： | IntroductionVortex is often the essential element re-sponsible for triggering stall and surge in com-pressors.So the identification and the analysisof the vortices in compressor are usually quitehelpful for the understanding of the compressorbehavior.Howe…
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| 关 键 词： | transonic compressor stall vortex identification tip leakage vortex |
| 文章编号： | 1000-8055(2007)09-1455-06 |
| 收稿时间： | 2007/6/28 0:00:00 |
| 修稿时间： | 2007年6月28日 |
Identification of vortices in a transonic compressor flow and the stall process |
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| HUANG Xu-dong,CHEN Hai-xin,FU Song,David Wisler,Aspi Wadi,G. Scott McNulty.Identification of vortices in a transonic compressor flow and the stall process[J].Journal of Aerospace Power,2007,22(9):1455-1460. |
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| Authors: | HUANG Xu-dong CHEN Hai-xin FU Song David Wisler Aspi Wadia and G Scott McNulty |
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| Institution: | 1. School of Aerospace, Tsinghua University, Beijing 100084
2. GE Aircraft Engines, Mail Drop A411, One Neumann Way, Cincinnati, OH 45215, USA |
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| Abstract: | A novel vortex identification method for the visualization of the flow field is used for the study of the stall process of a transonic compressor. The parameter η4, which is one of the five invariants formed by the stain rate and vorticity tensors from the theory of modern rational mechanics, is found to have good ability to identify vortex stretching and vortex relaxation/breakdown processes, is introduced here to identify the tip leakage vortices. Compare with former generally used DPH(dynamic pressure head) contour, the new method reveals much more flow details which may advance our understanding of the compressor behaviors. The Vortices details are revealed in both peak efficiency and near stall condition. A possible stall process is also suggested based on the vortices analysis. The tip leakage flow from mid-chord, besides leading edge leakage flow, is also considered to play an important role in the stall process. |
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| Keywords: | transonic compressor stall vortex identification tip leakage vortex |
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