进气畸变条件下新型机匣处理扩稳效果实验研究

doi:10.7527/S1000-6893.2013.0248

Abstract

Abstract:

Inlet pressure distortion is a common factor which induces rotating stall of an aero-engine fan/compressor. A novel casing treatment is used to enhance the stall margin of the fan/compressor. In the present work, experimental study is conducted on the effect of the novel casing treatment in the conditions of inlet pressure distortion. The flow-pressure ratio characteristic of a low-speed fan under inlet distortion and its efficiency characteristic with casing treatment are also investigated. The results show that the flow-pressure curve moves to the lower-right direction under inlet distortion. The more the distortion becomes, the more the curve moves. The novel casing treatment improves the stall margin (5%-8%) significantly in the condition of different distortion degrees. As for efficiency characteristic, below 20% distortion, the casing treatment does not incur recognizable efficiency loss of the fan, while above distortion, the efficiency loss is about 1%-2%.

Key words: fan/compressor, inlet pressure distortion, rotating stall, novel casing treatment, stall margin

CLC Number:

V231.3

XIONG Shan, SUN Dakun, SUO Qiuling, CHEN Jun, SUN Xiaofeng. Experimental Investigation of Novel Casing Treatment on Stall Margin Enhancement Under Inlet Distortion[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(12): 2692-2700.

References

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Experimental Investigation of Novel Casing Treatment on Stall Margin Enhancement Under Inlet Distortion

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