Influence of Free-Stream Turbulence and Blade Pressure Gradient on Boundary Layer and Loss Behavior of Turbine Cascades

[+] Author and Article Information
H. Hoheisel, R. Kiock

Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt (DFVLR), Institut für Entwurfsaerodynamik, Braunschweig, W. Germany

H. J. Lichtfuss

Motoren- und Turbinen-Union GmbH (MTU), München, W. Germany

L. Fottner

Universität der Bundeswehr München, Institut für Strahlantriebe, Neubiberg, W. Germany

J. Turbomach 109(2), 210-219 (Apr 01, 1987) (10 pages) doi:10.1115/1.3262087 History: Received February 19, 1986; Online November 09, 2009


The optimization of the blade surface velocity distribution is promising for a reduction of turbine cascade losses. Theoretical and experimental investigations on three turbine cascades with the same blade loading show the important influence of the blade pressure gradient and the free-stream turbulence on the loss behavior. The results presented demonstrate that it is the boundary layer transition behavior that determines the losses on turbine cascades. An enormous effort in measuring technique is required in order to define the location of transition from cascade experiments very accurately.

Copyright © 1987 by ASME
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