The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Numerical Study on Effects of Splitter Chord Length and Pitchwise Location on the Flow Characteristics in a Transonic Centrifugal Compressor

스플리터의 코드길이와 피치방향 위치가 천음속 원심압축기의 유동 특성에 미치는 영향에 대한 전산해석적 연구

  • Lee, Byung Ju (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Kim, Dae Hyun (Department of Mechanical Engineering, Graduate School, Korea University) ;
  • Chung, Jin Taek (Department of Mechanical Engineering, Korea University)
  • 이병주 (고려대학교 대학원 기계공학과) ;
  • 김대현 (고려대학교 대학원 기계공학과) ;
  • 정진택 (고려대학교 기계공학부)
  • Received : 2016.02.16
  • Accepted : 2016.04.10
  • Published : 2016.10.01
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Abstract

The purpose of this study is to design the transonic centrifugal compressor impeller with splitter blades and analyze the flow fields with respect to various splitter blades. Seven impellers with different splitter chord length or pitchwise location were tested by using CFD method. To investigate aerodynamic performance, Mach number distribution and entropy distribution were confirmed. As a result, it is found that the size of transonic region and shock wave location are related to the splitter chord length and pitchwise location. Also the impeller with long chord length of splitter shows higher total pressure ratio but lower efficiency than those of the impeller with short chord length of splitter. In terms of pitchwise location, the impeller with the splitter located in mid-pitch of main blades shows the best performance with respect to pressure ratio and efficiency.

Keywords

References

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