Three-Dimensional Wake Decay Inside of a Compressor Cascade and Its Influence on the Downstream Unsteady Flow Field: Part I—Wake Decay Characteristics in the Flow Passage

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

Institut für Strahlantriebe und Turboarbeitsmaschinen, RWTH Aachen, 5100 Aachen, Federal Republic of Germany

J. Turbomach 113(2), 180-189 (Apr 01, 1991) (10 pages) doi:10.1115/1.2929081 History: Received January 31, 1990; Online June 09, 2008


A measuring technique based on multisensor hot-wire anemometry has been developed to determine the unsteady three-dimensional velocity vector and the structure of turbulent flows. It has then been applied to the passage and the exit flow of an annular compressor cascade, which is periodically disturbed by the wakes of a cylinder rotor, located about 50 percent of blade chord upstream. In part I of this paper the decay of the rotor wakes will be described first without stator and secondly through a stator passage. The time-dependent turbulent flow field downstream of this stator is discussed in Part II. The rotor wakes have a major influence on the development of three-dimensional separated regions inside the compressor cascade, and this interaction will be addressed in both parts of this paper.

Copyright © 1991 by The American Society of Mechanical Engineers
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