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RESEARCH PAPERS

Growth of Secondary Losses and Vorticity in an Axial Turbine Cascade

[+] Author and Article Information
D. G. Gregory-Smith

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

C. P. Graves

Gilbert Gilkes & Gordon Ltd., Kendal, Cumbria, LA9 7BZ, United Kingdom

J. A. Walsh

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

J. Turbomach 110(1), 1-8 (Jan 01, 1988) (8 pages) doi:10.1115/1.3262163 History: Received February 10, 1987; Online November 09, 2009

Abstract

The growth of losses, secondary kinetic energy, and streamwise vorticity have been studied in a high turning rotor cascade. Negative vorticity associated with the passage vortex agreed well with predictions of classical secondary flow theory in the early part of the blade passage. However, toward the exit, the distortion of the flow by the secondary velocities rendered the predictions inaccurate. Areas of positive vorticity were associated with the feeding of loss into the bulk flow and have been related to separation lines observed by surface flow visualization.

Copyright © 1988 by ASME
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