Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Study on performance prediction of centrifugal compressor with diffuser angle and rotational speed change

원심압축기의 디퓨져 각도조절과 회전수변경에 따른 성능예측에 관한 연구

  • Park, Y.H. (Graduate School, Gyeongsang National University) ;
  • Shim, Y.H. (Division of Turbo-charger, SamJeong Turbine Co. Ltd.) ;
  • Kim, C.S. (Department of Mechanical Engineering, ChangWon National University) ;
  • Cho, S.Y. (Research Center for Aircraft Parts Technology, Gyeongsang National University)
  • 박영하 (경상대학교 대학원) ;
  • 심영호 (삼정터빈 터보사업부기술팀) ;
  • 김재실 (창원대학교 기계공학과) ;
  • 조수용 (경상대학교 항공기부품기술연구소)
  • Received : 2012.05.03
  • Accepted : 2012.08.03
  • Published : 2012.10.31
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Abstract

Centrifugal compressors are widely used and each operating condition is different. However, it cannot be manufactured according to the every operating condition. In the this study, performance of compressor was evaluated with various rotational speeds of impeller and various stagger angles of diffuser in order to apply a typical model widely. A centrifugal compressor was designed and manufactured based on the design point. On this machines, an experiment was conducted and the performance was predicted at off-design point. The performance prediction was validated with the experimental result and the numerical result. Although the isentropic efficiency on the prediction was slightly lower than that on the experimental result due to the heat loss in the experiment, the pressure ratio was predicted well and also the predicted results were matched well with the numerical results. When the rotational speed of the impeller and the stagger angle of the diffuser were changed together, the compressor can be worked in the high efficiency region and avoided operating in the stall region.

Keywords

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