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A Numerical Study of the Three-Dimensional Turbulent Flow in the Impeller of a High-Speed Centrifugal Compressor FREE

[+] Author Affiliations
R. P. Clayton, W. U. A. Leong, R. Sanatian

Computational Dynamics Limited, London, UK

R. I. Issa, G. Xi

Imperial College of Science, Technology and Medicine, London, UK

Paper No. 98-GT-049, pp. V001T01A017; 25 pages
doi:10.1115/98-GT-049
From:
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 1: Turbomachinery
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7862-0
  • Copyright © 1998 by ASME

abstract

Numerical analysis of the three-dimensional turbulent flow in an unshrouded impeller of a high-speed centrifugal compressor has been conducted using the multi-purpose CFD code STAR-CD. The work presented in this paper concentrates mainly on assessing the effects of the modelling of the actual spinner geometry on the quality of the predictions as compared to the often used practice of simplifying the inlet geometry. Furthermore, the contribution of detailed modelling of the flow in the tip clearance is studied using a two-layer k-ε turbulence model. As well as a qualitative analysis of the throughflow and tip leakage, a systematic quantitative comparison between the predicted and measured mean velocities and flow angles is presented.

Copyright © 1998 by ASME
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