The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Effects of Blade Back Sweep Angle on the Performance and Flow Field in a Centrifugal Compressor

블레이드 후향각이 원심압축기의 성능과 유동에 미치는 영향

  • 정요한 (포항공과대학교 기계공학과 대학원) ;
  • 백제현 (포항공과대학교 기계공학과) ;
  • 박준영 (한국기계연구원) ;
  • 최민석 (명지대학교 기계공학과)
  • Received : 2012.10.28
  • Accepted : 2013.03.21
  • Published : 2013.04.01
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Abstract

This paper presents a numerical investigation of the influence of the blade back sweep angle on the performance and flow characteristics in a centrifugal compressor with a vaneless diffuser. Five impellers with different back sweep angles were tested in the flow simulations. It was found that a low back sweep angle could improve the total-to-total pressure ratio and the work coefficient over whole operating ranges. However, the flow field in an impeller with a low back sweep angle produced a more non-uniform velocity distribution at the impeller exit because the wake region was significantly increased. As a consequence, the impeller with a low back sweep angle caused a low diffuser performance.

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References

  1. Zangeneh, M., Schleer, M., Ploger, F., Hong, S., Roduner, C., Ribi, B., and Abhari, R., 2004, "Investigation of an inversely designed centrifugal compressor stage - Part 1. Design and numerical verification," Journal of Turbomachinery, Vol. 126, No. 1, pp. 73-81. https://doi.org/10.1115/1.1645868
  2. Bonaiuti, D., Arnone, A., and Ermini, M., 2006, "Analysis and optimization of transonic centrifugal compressor impellers using the design of experiments techniques," Journal of Turbomachinery, Vol. 128, No. 4, pp. 786-797. https://doi.org/10.1115/1.1579507
  3. Roytta, P., Gronman, A., Jaatinen, A., Turunen-Saaresti, T., and Backman, J., 2009, "Effects of different blade angle distributions on centrifugal compressor performance," International Journal of Rotating Machinery, ID 537802.
  4. Rodgers, C., 1980, "Specific speed and efficiency of centrifugal impellers," Proceedings of the ASME 25th Gasturbine Conference, New Orleans, USA, pp. 191-200.
  5. Cumpsty, N. A., 1989, "Compressor Aerodynamics," Longman Scientific & Technical, England.
  6. Japikse, D., 1996, "Centrifugal Compressor Design and Performance," Concepts ETI, Inc.
  7. Hildebrandt, A. and Genrup, M., 2007, "Numerical investigation of the effect of different back sweep angle and exducer width on the impeller outlet flow pattern of a centrifugal compressor with vaneless diffuser," Journal of Turbomachinery, Vol. 129, No. 2, pp. 421-433. https://doi.org/10.1115/1.2447873

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