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RESEARCH PAPERS

Boundary-Layer Transition and Separation Near the Leading Edge of a High-Speed Turbine Blade

[+] Author and Article Information
H. P. Hodson

Whittle Laboratory, Cambridge University Engineering Department, Cambridge, England

J. Eng. Gas Turbines Power 107(1), 127-134 (Jan 01, 1985) (8 pages) doi:10.1115/1.3239672 History: Received January 12, 1984; Online October 15, 2009

Abstract

The state of the boundary layers near the leading edge of a high-speed turbine blade has been investigated, in cascade, using an array of surface-mounted, constant-temperature, hot-film anemometers. The measurements are interpreted with the aid of inviscid and viscous prediction codes. The effects of Reynolds number, compressibility, incidence, and free-stream turbulence are described. In all cases, the initial development of the boundary layers was extremely complex and, even at design conditions, separation and reattachment, transition and relaminarization were found to occur.

Copyright © 1985 by ASME
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