Detection of a Rotating Stall Precursor in Isolated Axial Flow Compressor Rotors

[+] Author and Article Information
M. Inoue, M. Kuroumaru, T. Iwamoto, Y. Ando

Department of Mechanical Engineering for Power, Kyushu University, Fukuoka, Japan

J. Turbomach 113(2), 281-287 (Apr 01, 1991) (7 pages) doi:10.1115/1.2929102 History: Received February 07, 1990; Online June 09, 2008


Statistical characteristics of pressure fluctuation on the casing wall of two axial flow compressor rotors have been investigated experimentally to find a precursor of rotating stall. Near stall, the casing wall pressure across a flow passage near the leading edge is characterized by a highly unsteady region where low-momentum fluid accumulates. The periodicity of the pressure fluctuation with blade spacing disappears and an alternative phenomenon comes into existence, which supports the disturbance propagating at a different speed from the rotor revolution. The precursor of rotating stall can be detected by monitoring collapse of the periodicity in the pressure fluctuation. To represent the periodicity qualitatively, a practical detection parameter has been proposed, which is easily obtained from signals of a single pressure sensor installed at an appropriate position on the casing wall during operation of a compressor.

Copyright © 1991 by The American Society of Mechanical Engineers
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