The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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The Evaluation of Performance and Flow Characteristics on the Diffuser Geometries Variations of the Centrifugal Compressor in a Marine Engine Turbocharger

박용 터보차져의 원심압축기의 디퓨져 형상변경에 따른 성능비교 및 유동특성 평가 연구

  • 김홍원 ((주)현대중공업 엔진연구실) ;
  • 하지수 (계명대학교 에너지환경과학과) ;
  • 김봉환 (진주산업대학교 자동차공학과)
  • Published : 2008.04.01
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Abstract

An examination of the condition of the flow leaving the impeller exit kinetic energy often accounts for 30-50% of the shaft work input to the compressor stage, and for energy efficiency it is important to recover as much of this as possible. This is the function of the diffuser which follows the impeller. The purpose of this study is to investigate the sensitivity of how compressor performances changes as vaned diffuser geometry is varied. Three kinds of vaned diffusers were studied and its results were compared. First vaned diffuser type is based on NACA airfoil and second is channel diffuser and third is conformal transformation of NACA65(4A10)06 airfoil. Mean-line prediction method was applied to investigate the performance and stability for three kinds of diffusers. And CFD analyses have been done for comparison and detailed interior flow pattern study. NACA65(4A10)06 airfoil showed the widest operating range and higher pressure characteristics than the others.

Keywords

References

  1. D. Japikse and N. C. Baines, "Diffuser Design Technology," 287, Concepts ETI, Inc(1998)
  2. D. Japikse, "Centrifugal Compressor Design and Performance," 7-30, Concepts ETI, Inc(1996)
  3. W. Jiang, J. Khan and R. A. Dougal, "Dynamic centrifugal compressor model for system simulation," Journal of Power Sources, 158, pp. 1333-1343(2006) https://doi.org/10.1016/j.jpowsour.2005.10.093
  4. J. S. Oh, "Investigation of Off-Design Performance of Vaned Diffusers in Centrifugal Compressors Part II : A Low Solidity Cascade Diffuser," ASME GT2002-30388(2002)
  5. H. W. Kim, "A Numerical Approach for the Design of the Compressor Impeller Exit Diameter in a marine Engine Turbocharger," Proceedings of the ASME Turbo Expo 2005, GT2005-68653(2005)
  6. S. L. Dixon, "Thermodynamics of Turbomachinery," Pergamon International Library(1978)

Cited by

  1. vol.12, pp.1, 2009, https://doi.org/10.5293/KFMA.2009.12.1.065