Stator Endwall Leading-Edge Sweep and Hub Shroud Influence on Compressor Performance

[+] Author and Article Information
D. L. Tweedt, T. H. Okiishi

Department of Mechanical Engineering, Engineering Research Institute, Iowa State University, Ames, IA 50011

M. D. Hathaway

U.S. Army Research and Technology Laboratories, Cleveland, OH 44135

J. Turbomach 108(2), 224-232 (Oct 01, 1986) (9 pages) doi:10.1115/1.3262041 History: Received February 11, 1986; Online November 09, 2009


The use of stator endwall leading-edge sweep to improve axial-flow compressor stator row performance was examined experimentally. The aerodynamics of three stator hub (inner diameter) conditions, namely, a running clearance, a stationary clearance, and a shroud, were also investigated. Leading-edge sweep in the endwall regions of a stator blade can be beneficial in terms of loss reduction on the casing (outer diameter) end of a stator blade. It can also help at the hub end of a stator blade when either a stationary hub clearance or a hub shroud is used. A leading-edge sweep is detrimental (local loss increase) on the hub end of a stator blade when a running hub clearance is used. A running clearance is aerodynamically preferable to a stationary clearance.

Copyright © 1986 by ASME
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