Volume 30 Issue 9
Sep.  2015
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WANG Lei-lei, LAO Da-zhong, ZHAO Ben, LIU Heng, YANG Ce. Influence of the U-shape inlet pipe on a centrifugal compressor performance[J]. Journal of Aerospace Power, 2015, 30(9): 2251-2260. doi: 10.13224/j.cnki.jasp.2015.09.026
Citation: WANG Lei-lei, LAO Da-zhong, ZHAO Ben, LIU Heng, YANG Ce. Influence of the U-shape inlet pipe on a centrifugal compressor performance[J]. Journal of Aerospace Power, 2015, 30(9): 2251-2260. doi: 10.13224/j.cnki.jasp.2015.09.026
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Influence of the U-shape inlet pipe on a centrifugal compressor performance

doi: 10.13224/j.cnki.jasp.2015.09.026

  • 1. Turbomachinery Institute, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;

  • 2. Mechanical and Electrical Engineering Institute, Hebei University of Engineering, Handan Hebei 056038, China

  • Received Date: 2014-03-17
  • Publish Date: 2015-09-28
    Abstract
  • The effects of the U-shape pipe on a centrifugal compressor were investigated with experimental and numerical simulation methods. Compared with straight pipe inlet, the bend pipe resulted in a significant performance degradation of the compressor at the high mass flow rate. The pressure ratio and efficiency dropped by 10% and 18%, respectively. The numerical results show that the distortions of the static pressure and the total pressure were generated at the outlet of U-shape pipe. The pressure distortions were induced by the circumferential nonuniform geometry of downstream compressor volute. When transported to the upstream blade channels, the outlet pressure distortions encountered with the inlet pressure distortions. These coupled distortions changed the flow structure and inlet conditions in the impeller inlet, and also the mass flow rates distribution in the blade channels. The entropy increase existed at the distortion regions of the impeller. Meanwhile, the mean load of whole main blades increased about 8% due to the variations of the static pressure distribution at main blade surfaces.

     

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