Inlet Skew and the Growth of Secondary Losses and Vorticity in a Turbine Cascade

[+] Author and Article Information
J. A. Walsh

Logica Space and Defense Systems Ltd., London, W1A 4SE United Kingdom

D. G. Gregory-Smith

School of Engineering and Applied Science, University of Durham, Durham, DH1 3LE United Kingdom

J. Turbomach 112(4), 633-642 (Oct 01, 1990) (10 pages) doi:10.1115/1.2927704 History: Received January 13, 1989; Online June 09, 2008


This paper presents results of an experimental investigation into the effects of inlet skew on the flow field of a large-scale axial flow turbine cascade. The results are presented in terms of the development of the streamwise vorticity since, in classical terms, the streamwise vorticity generates the transverse velocity components that cause the generation of the secondary losses. Inlet skew is shown to have a profound effect on the distribution and magnitude of the generated losses. A number of correlations for the secondary losses are compared with the measured values and it is shown that the correlations are not adequate for accurate loss prediction purposes.

Copyright © 1990 by The American Society of Mechanical Engineers
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