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Measurements of the Effect of Free-Stream Turbulence Length Scale on Heat Transfer PUBLIC ACCESS

[+] Author Affiliations
R. W. Moss, M. L. G. Oldfield

University of Oxford

Paper No. 92-GT-244, pp. V004T09A024; 8 pages
doi:10.1115/92-GT-244
From:
  • ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Cologne, Germany, June 1–4, 1992
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7896-5
  • Copyright © 1992 by ASME

abstract

The effects of free-stream turbulence scale on heat transfer through a turbulent flat plate boundary layer have been measured. A variety of turbulence spectra were produced by parallel bar grids. The design of these was guided by previous measurements of combustion chamber turbulence. Heat transfer was measured transiently using thin film gauges. The heat transfer to the plate was found to be a function of turbulence integral length scale as well as intensity, and is of relevance to gas turbine heat transfer where aerofoils are subject to high turbulence levels from the combustor. Enhancement factors of up to 40% were experienced and the results extend conclusions drawn by other workers to higher turbulence levels and scales.

Copyright © 1992 by ASME
This article is only available in the PDF format.

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