The Effect of Inlet Distortion on the Performance Characteristics of a Centrifugal Compressor

[+] Author and Article Information
I. Ariga, N. Kasai, S. Masuda

Keio University, Yokohama, Japan

Y. Watanabe

Power Plant Overhaul Center, Japan Air Lines, Tokyo, Japan

I. Watanabe

Kanto-Gakuin University, Yokohama, Japan

J. Eng. Power 105(2), 223-230 (Apr 01, 1983) (8 pages) doi:10.1115/1.3227406 History: Received December 07, 1981; Online September 28, 2009


The present paper concerns itself with the effects of total pressure (and thus velocity) distortion on performance characteristics and surge margin of centrifugal compressors. Both radial and circumferential distortions were investigated. The performance tests as well as the velocity measurements within the impeller passages were carried out with a low-speed compressor test rig with the inlet honeycomb as the distortion generators and compared with the case of “no distortion” as a datum. The results indicated that the inlet distortion exerted unfavorable influences on the efficiency and the surge margin of the given compressor, though the influence of the radial distortion was much stronger than that of the circumferential one. Various distortion indices were further examined in order to correlate the performance to the inlet distortion.

Copyright © 1983 by ASME
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