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RESEARCH PAPERS

A Theory of Post-Stall Transients in Axial Compression Systems: Part II—Application

[+] Author and Article Information
E. M. Greitzer

Massachusetts Institute of Technology, Cambridge, MA

F. K. Moore

Cornell University, Ithaca, NY

J. Eng. Gas Turbines Power 108(2), 231-239 (Apr 01, 1986) (9 pages) doi:10.1115/1.3239893 History: Received January 10, 1985; Online October 15, 2009

Abstract

Using the theory developed in Part I, calculations have been carried out to show the evolution of the mass flow, pressure rise, and rotating-stall cell amplitude during compression system post-stall transients. In particular, it is shown that the unsteady growth or decay of the stall cell can have a significant effect on the instantaneous compressor pumping characteristic and hence on the overall system behavior. A limited parametric study is carried out to illustrate the impact of different system features on transient behavior. It is shown, for example, that the ultimate mode of system response, surge or stable rotating stall, depends not only on the B parameter, but also on the compressor length-to-radius ratio. Small values of the latter quantity tend to favor the occurrence of surge, as do large values of B . Based on the analytical and numerical results, some specific topics are suggested for future research on post-stall transients.

Copyright © 1986 by ASME
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