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RESEARCH PAPERS

Boundary Layer Studies on Highly Loaded Cascades using Heated Thin Films and a Traversing Probe

[+] Author and Article Information
M. L. G. Oldfield

Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, England

R. Kiock

Deutsche Forschungs-und Versuchsanstalt fur Luft-und Raumfahrt, 33 Braunschweig Fiughafen, West Germany

A. T. Holmes, C. G. Graham

Aero Division, Rolls Royce Limited, Bristol BS12 7OE, England

J. Eng. Power 103(1), 237-246 (Jan 01, 1981) (10 pages) doi:10.1115/1.3230703 History: Received January 02, 1980; Online September 28, 2009

Abstract

In the continuing quest for increased turbine efficiency, the part played by blade profile shape remains crucial. Three turbine vanes with successively increased aerodynamic loading were tested in the High Speed Cascade Wind Tunnel at DFVLR Braunschweig. In addition to wake traverses, measurements of the boundary layer behavior were made. These consisted of (1) use of a constant temperature anemometer to measure the fluctuating heat transfer rate on an array of thin film platinum thermometers deposited on the vanes and (2) a flattened, traversing pitot probe held against the vane surface. Transition measurement by these techniques is described.

Copyright © 1981 by ASME
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