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RESEARCH PAPERS

The Role of Laminar-Turbulent Transition in Gas Turbine Engines: A Discussion

[+] Author and Article Information
G. J. Walker

University of Tasmania, Hobart, Australia

J. Turbomach 115(2), 207-216 (Apr 01, 1993) (10 pages) doi:10.1115/1.2929223 History: Received February 24, 1992; Online June 09, 2008

Abstract

An extended discussion of Mayle’s (1991) critical study of transition phenomena in gas turbine engines is presented. Attention is focused on transition in decelerating flow regions, which are the major sources of loss production for axial turbomachine blades. The following points are examined in detail: (a) the physics of transition and its implications for the correlation of various transition phenomena; (b) the relative importance of pressure gradient and free-stream turbulence in controlling transition; (c) the influence of pressure gradient on periodic-unsteady transition; (d) the correlation of transition length under conditions of arbitrary pressure gradient and free-stream turbulence level; and (e) transition behavior in laminar separation bubbles. The discussion examines various differences in philosophy concerning the above phenomena and makes further suggestions for transition research, which may assist in resolving the issues raised.

Copyright © 1993 by The American Society of Mechanical Engineers
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