Heat Transfer Measurements to a Gas Turbine Cooling Passage With Inclined Ribs

[+] Author and Article Information
Z. Wang

Ellison Surface Technologies, Inc., 1780 Anderson Blvd., Hebron, KY 41048

P. T. Ireland

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

S. T. Kohler, J. W. Chew

Rolls Royce plc, P.O. Box 3, Filton, Bristol, BS12 7QE, United Kingdom

J. Turbomach 120(1), 63-69 (Jan 01, 1998) (7 pages) doi:10.1115/1.2841390 History: Received February 01, 1996; Online January 29, 2008


The local heat transfer coefficient distribution over all four walls of a large-scale model of a gas turbine cooling passage have been measured in great detail. A new method of determine the heat transfer coefficient to the rib surface has been developed and the contribution of the rib, at 5 percent blockage, to the overall roughened heat transfer coefficient was found to be considerable. The vortex-dominated flow field was interpreted from the detailed form of the measured local heat transfer contours. Computational Fluid Dynamics calculations support this model of the flow and yield friction factors that agree with measured values. Advances in the heat transfer measuring technique and data analysis procedure that confirm the accuracy of the transient method are described in full.

Copyright © 1998 by The American Society of Mechanical Engineers
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