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RESEARCH PAPERS

A Method for Assessing Effects of Circumferential Flow Distortion on Compressor Stability

[+] Author and Article Information
T. P. Hynes, E. M. Greitzer

Whittle Laboratory, Engineering Department, Cambridge University, Cambridge CB3 0EL, England

J. Turbomach 109(3), 371-379 (Jul 01, 1987) (9 pages) doi:10.1115/1.3262116 History: Received September 13, 1985; Online November 09, 2009

Abstract

This paper describes the development of a new analysis to predict the onset of flow instability for an axial compressor operating in a circumferentially distorted inlet flow. A relatively simple model is used to examine the influence of various distortions in setting this instability point. It is found that the model reproduces known experimental trends for the loss of stability margin with increasing distortion amplitude and with changes in reduced frequency. In particular, there is a recognizable “critical sector angle” which characterizes loss of stability margin. To the authors’ knowledge, this is the first time the effects described herein have been theoretically demonstrated as the direct result of a fluid dynamic stability calculation.

Copyright © 1987 by ASME
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