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

Detection of a Rotating Stall Precursor in Isolated Axial Flow Compressor Rotors <jats:p>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.</jats:p> http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Turbomachinery CrossRef

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

Journal of Turbomachinery , Volume 113 (2): 281-287 – Apr 1, 1991

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


Abstract

<jats:p>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.</jats:p>

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Publisher
CrossRef
ISSN
0889-504X
DOI
10.1115/1.2929102
Publisher site
See Article on Publisher Site

Abstract

<jats:p>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.</jats:p>

Journal

Journal of TurbomachineryCrossRef

Published: Apr 1, 1991

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