A Technique for Measuring Convective Heat Transfer at Rough Surfaces PUBLIC ACCESS

[+] Author Affiliations
Z. Wang, P. T. Ireland, T. V. Jones

University of Oxford, Oxford

Paper No. 90-GT-300, pp. V004T09A034; 8 pages
  • ASME 1990 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Brussels, Belgium, June 11–14, 1990
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7907-8
  • Copyright © 1990 by ASME


A new method has been developed for measuring local heat transfer coefficients at rough surfaces. The technique was applied to an idealised section of a large scaled model of a turbine blade cooling passage to assess the effect of surface irregularities which result from the blade manufacturing process. The experimental method is described in full and the results are presented for tests on an isolated pin-fin situated in fully developed channel flow. The effect of the thermal conductivity of the roughness elements is discussed.

Copyright © 1990 by ASME
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