Correlation of Tip Clearance Effects to Impeller Geometry and Fluid Dynamics PUBLIC ACCESS

[+] Author Affiliations
A. Engeda, W. P. Strate, M. Rautenberg

University of Hannover, Hannover, F.R. Germany

Paper No. 88-GT-92, pp. V001T01A040; 7 pages
  • ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Amsterdam, The Netherlands, June 6–9, 1988
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7918-4
  • Copyright © 1988 by ASME


Results of a continious effort at such a correlation, involving the most important effects of tip clearance on overall efficiency deterioration, are presented. The term tip clearance refers to the clearance between the vane tips of a half shrouded impeller and the front casing. In an attempt to develop a simple and more universal approach for the estimation of tip clearance losses in centrifugal impellers, the possibility of correlation through specific speed is examined. A tip clearance loss sensitivity factor is introduced and its likely dependence on specific speed presented. The weakness and ambiguity of the correlcation are discussed.

Copyright © 1988 by ASME
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