Experimental Study on the Three-Dimensional Flow Within a Compressor Cascade With Tip Clearance: Part II—The Tip Leakage Vortex

[+] Author and Article Information
S. Kang, C. Hirsch

Vrije Universiteit Brussel, Department of Fluid Mechanics, 1050 Brussel, Belgium

J. Turbomach 115(3), 444-450 (Jul 01, 1993) (7 pages) doi:10.1115/1.2929271 History: Received February 27, 1992; Online June 09, 2008


An analysis of the experimental data of a linear compressor cascade with tip clearance is presented with special attention to the development of the tip leakage vortex. A method for determining the tip vortex core size, center position, and vorticity or circulation from the measured data is proposed, based on the assumption of a circular tip vortex core. It is observed that the axial velocity profile passing through the tip vortex center is wavelike. The vorticity of the tip vortex increases rapidly near the leading edge and reaches its highest values at a short distance downstream, from which it gradually decreases. In the whole evolution, its size is growing and its center is moving away from both the suction surface and the endwall, approximately in a linear way.

Copyright © 1993 by The American Society of Mechanical Engineers
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