The Effect of Wake-Passing and Free-Stream Turbulence on Laminar Gas Turbine Blade Boundary Layers

[+] Author and Article Information
D. Greenblatt

Division of Aeronautical Systems Technology (Aerotek), Council for Scientific and Industrial Research, Pretoria, Republic of South Africa

J. Turbomach 116(3), 384-391 (Jul 01, 1994) (8 pages) doi:10.1115/1.2929425 History: Received March 03, 1993; Online June 09, 2008


A computational procedure has been developed that accounts for the combined time-mean effect of wake-passing and free-stream turbulence on laminar turbine blade boundary layers. The procedure has the advantage of being computationally efficient as well as providing a realistic model of the unsteady nature of the flow. The procedure yielded the parameter TuReDD/2 for characterizing the time-mean flow in the leading edge region and the parameter Γ (≡ 2T̃Tu2 σx /γ) for describing the flow downstream of the stagnation point. A provisional comparison with stagnation flow experimental data showed that the procedure may be more general than initially expected.

Copyright © 1994 by The American Society of Mechanical Engineers
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