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RESEARCH PAPERS

Monitoring of Aerodynamic Load and Detection of Stall in Multistage Axial Compressors

[+] Author and Article Information
H. Hönen, H. E. Gallus

Institut für Strahlantriebe und Turboarbeitsmaschinen, Rheinisch-Westfälische Technische Hochschule Aachen, Aachen, Federal Republic of Germany

J. Turbomach 117(1), 81-86 (Jan 01, 1995) (6 pages) doi:10.1115/1.2835645 History: Received February 12, 1993; Online January 29, 2008

Abstract

The unsteady flow in a single-stage axial flow compressor at different operating conditions has been investigated with hot-wire and hot-film probes to find out the influence of the aerodynamic compressor load on the periodic fluctuations. These results are compared with measurements in the last stages of a multistage high-pressure compressor of a gas turbine for normal operation and under stall conditions. From the patterns of the frequency spectra of the measuring signals a parameter for the detection of the approach to the stability line of a compressor is derived. A method for the on-line monitoring of the aerodynamic load is presented. Based on these results a monitoring system has been developed. First experiences with this system, applied to two multistage compressors, are reported.

Copyright © 1995 by The American Society of Mechanical Engineers
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