ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Experimental Investigation of Novel Casing Treatment on Stall Margin Enhancement Under Inlet Distortion
Received date: 2013-02-25
Revised date: 2013-05-05
Online published: 2013-05-09
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%.
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 . DOI: 10.7527/S1000-6893.2013.0248
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