Volume 30 Issue 12
Dec.  2015
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Article Navigation >  Journal of Aerospace Power  > 2015  >  30(12): 2960-2969
KANG Jian-xiong, HUANG Guo-ping, ZHU Jun-qiang, WEN Dian-zhong. Stall mode of centrifugal compressor and mechanism of self-recirculating casing treatment[J]. Journal of Aerospace Power, 2015, 30(12): 2960-2969. doi: 10.13224/j.cnki.jasp.2015.12.020
Citation: KANG Jian-xiong, HUANG Guo-ping, ZHU Jun-qiang, WEN Dian-zhong. Stall mode of centrifugal compressor and mechanism of self-recirculating casing treatment[J]. Journal of Aerospace Power, 2015, 30(12): 2960-2969. doi: 10.13224/j.cnki.jasp.2015.12.020
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Stall mode of centrifugal compressor and mechanism of self-recirculating casing treatment

doi: 10.13224/j.cnki.jasp.2015.12.020

  • 1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 2. Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;

  • 3. China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou Hunan 412002, China

  • Received Date: 2014-04-27
  • Publish Date: 2015-12-28
    Abstract
  • In order to explore the variation of stall mode with changing speed and the mechanism transition of casing treatment under different stall modes, numerical simulation of a centrifugal compressor with solid wall casing and casing treatment under different speeds was performed. The results showed that the stall mode transited from diffuser stall at 100% design speed to inducer stall with the speed decrease. Inducer stall also experienced from end wall stall and blade leading edge stall at 80% design speed to wide-range full stall at 50% design speed. The effect of self-recirculating casing treatment on stall margin and efficiency of centrifugal compressor were closely related to the stall mode, its stability enhancement effect was only valid for the blade leading edge stall at 80% design speed. At about 80% design speed, casing treatment tended to bring about bigger flow rate operating point for the main flow efficiency, thus reducing the efficiency. When the speed was low enough to 50% design speed, with a wide recirculation region in main flow passage, the secondary reverse flow in casing treatment could reduce the load of the impeller to passage recirculation region, so as to improve the efficiency.

     

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