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Laminar Boundary Layer Flow and Heat Transfer With Favorable Pressure Gradient at Constant K Values PUBLIC ACCESS

[+] Author Affiliations
Dadong Zhou, Ting Wang

Clemson University, Clemson, SC

Paper No. 92-GT-246, pp. V004T09A026; 9 pages
doi:10.1115/92-GT-246
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

Approximate algebraic correlations for the two-dimensional laminar boundary layer flow and heat transfer with favorable pressure gradient at constant K Display Formula(vUe2dUedx) values were found by using Pohlhausen’s integral method. Two thermal boundary conditions were considered: constant wall heat flux and constant wall temperature. These correlations were tabulated and compared in the limits KRex → 0 and KRex → ∞ with the similarity solutions of the Blasius flow and the convergent-channel flow. The comparisons between these correlations and those obtained numerically from the STAN5 code were excellent. The results showed that the momentum boundary layer grows at the leading edge with an initial rate like the Blasius flow to a maximum value, then decreases and asymptotically approaches the behavior of a convergent-channel flow. As KRex increases, the skin friction coefficient decreases and approaches a constant; the Pohlhausen’s pressure gradient parameter Display Formula(Λδ2vdUedx) increases from zero at the leading edge and approaches a constant. While hydrodynamically asymptotical solutions were obtained, no asymptotical thermal similarity was found. Skin friction coefficient and various integral parameters could be collapsed into a corresponding single curve when suitable normalization factors were chosen. The effects of Prandtl number and unheated starting length were also analyzed.

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

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