Periodically Unsteady Flow in an Imbedded Stage of a Multistage, Axial-Flow Turbomachine

[+] Author and Article Information
J. H. Wagner, T. H. Okiishi, G. J. Holbrook

Mechanical Engineering Department and Engineering Research Institute, Iowa State University, Ames, Iowa

J. Eng. Power 101(1), 42-51 (Jan 01, 1979) (10 pages) doi:10.1115/1.3446457 History: Received November 23, 1977; Online July 14, 2010


A periodic-average flow measurement technique involving a hot-wire sensor was used to measure the periodically unsteady velocity field in the first stage of a low-speed, multistage, axial-flow research compressor. In portions of the compressor annulus, the periodic-average velocity patterns for imbedded rotor and stator exit flows showed appreciable sequential variation with the systematically changed data sampling position of the rotor blades. Representative examples of periodic-average flow field variation with rotor blade sampling position in stop-action sequence are shown for various locations in the compressor. A simple, first-order approximation physical description of blade wake flow transport and interaction based on experimental data interpretation is proposed to organize and thus help understand the data obtained.

Copyright © 1979 by ASME
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