Three-Dimensional Separated Flow Field in the Endwall Region of an Annular Compressor Cascade in the Presence of Rotor-Stator Interaction: Part 2—Unsteady Flow and Pressure Field

[+] Author and Article Information
H. D. Schulz, H. E. Gallus, B. Lakshminarayana

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

J. Turbomach 112(4), 679-688 (Oct 01, 1990) (10 pages) doi:10.1115/1.2927708 History: Received February 14, 1989; Online June 09, 2008


An experimental study of the unsteady three-dimensional flow and pressure field in an annular compressor cascade with an upstream rotor has been carried out at several incidences to the stator blade. The distributions of the unsteady pressures at the blade surfaces are measured using fast response Kulite sensors. The unsteady blade boundary layers and the passage flow are measured with a hot-wire sensor. A detailed interpretation of the magnitude of unsteady pressures, phase angle differences, unsteady blade boundary layers, and wake transport through the stator passage is presented and analyzed in the paper. The unsteady pressures are found to be dominant near the blade leading edge. Substantially higher pressure fluctuations occur in this region as well as on the edge of the corner flow separation region.

Copyright © 1990 by The American Society of Mechanical Engineers
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