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RESEARCH PAPERS

Behavior of Tip Leakage Flow Behind an Axial Compressor Rotor

[+] Author and Article Information
M. Inoue, M. Kuroumaru, M. Fukuhara

Department of Mechanical Engineering, Power Division, Kyushu University, Fukuoka, Japan

J. Eng. Gas Turbines Power 108(1), 7-14 (Jan 01, 1986) (8 pages) doi:10.1115/1.3239889 History: Received December 21, 1984; Online October 15, 2009

Abstract

Performance testing and detailed flow measurements were made in an axial compressor rotor with various tip clearances. The experiments were conducted on the condition of the same incidence angle at midspan. Thus, the effect of tip clearance distinguished from that of incidence angle was investigated on the overall performance, work-done factor, blockage factor, and increases in displacement, momentum, and blade-force-deficit thicknesses of the casing wall boundary layer, The phase-locked flow patterns obtained by the multisampling technique show clear evidence of a leakage vortex core behind the rotor. Behavior of the leakage vortex was clarified for various tip clearances by examining loci of the vortex center, decay characteristics of the vorticity at the center, and the total amount of vorticity shed from the blade tip. These results were compared with the leakage vortex model presented by Lakshminarayana.

Copyright © 1986 by ASME
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