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International Journal of Rotating Machinery
Volume 6 (2000), Issue 2, Pages 79-89

Experimental Examination of an Axial Compressor as a Basis for an Active Stall Avoidance System

1Department of Gas Turbines and Flight Propulsion, Petersenstr. 30, Darmstadt University of Technology, Darmstadt D-64287, Germany
2lnstitute of Microelectronic Systems, Karlstr. 15, Darmstadt University of Technology, Darmstadt D-64287, Germany

Received 8 May 1998; Revised 16 July 1998

Copyright © 2000 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A single-stage subsonic compressor was examined with respect to compressor instabilities. During the inception of rotating stall, the transients of the pressure rise and mass flow were measured as well as their hysteresis. The development of the stall cell and the characteristics of the unstable operating range were determined.

Several measurement techniques and data analysis methods for the real-time detection of unstable compressor operation and aspects of their implementation on a digital signal processor are discussed.

The results of the work are meant to serve as a basis for the design of an active stall avoidance system.