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International Journal of Rotating Machinery
Volume 2009, Article ID 537802, 9 pages
Research Article

Effects of Different Blade Angle Distributions on Centrifugal Compressor Performance

Institute of Energy, Lappeenranta University of Technology, P. O. Box 20, 53851 Lappeenranta, Finland

Received 14 April 2009; Revised 1 September 2009; Accepted 23 November 2009

Academic Editor: David Japikse

Copyright © 2009 Pekka Röyttä et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A centrifugal compressor with three different shrouded 2D impellers is studied numerically. All impellers have the same dimensions, and they only differ in channel length and geometry. Noticeable differences in efficiency are observed. Two different turbulence models, Chien's k- and k- SST, are compared. For this case, k- SST was found more realistic. The hypothesis that pressure losses in a curved duct and in an impeller passage behave similarly is suggested and found inadequate.