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RESEARCH PAPERS

A Theory of Post-Stall Transients in Axial Compression Systems: Part I—Development of Equations

[+] Author and Article Information
F. K. Moore

Cornell University, Ithaca, NY

E. M. Greitzer

Massachusetts Institute of Technology, Cambridge, MA

J. Eng. Gas Turbines Power 108(1), 68-76 (Jan 01, 1986) (9 pages) doi:10.1115/1.3239887 History: Received January 10, 1985; Online October 15, 2009

Abstract

An approximate theory is presented for post-stall transients in multistage axial compression systems. The theory leads to a set of three simultaneous nonlinear third-order partial differential equations for pressure rise, and average and disturbed values of flow coefficient, as functions of time and angle around the compressor. By a Galerkin procedure, angular dependence is averaged, and the equations become first order in time. These final equations are capable of describing the growth and possible decay of a rotating-stall cell during a compressor mass-flow transient. It is shown how rotating-stall-like and surgelike motions are coupled through these equations, and also how the instantaneous compressor pumping characteristic changes during the transient stall process.

Copyright © 1986 by ASME
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