A new heat transfer correlation for turbulent boundary layers subjected to free-stream turbulence was developed. The new correlation estimates dimensionless heat transfer coefficients without the use of conventional boundary-layer thickness measures and the associated Reynolds numbers. Using only free-stream parameters (mean velocity, turbulence intensity and length scale), the new correlation collected many authors’ elevated-turbulence, flat-plate Stanton number data to within ±11%. The level of scatter around the new correlation compared well to previous correlations that require additional flow information as input parameters. For a common subset of data, scatter using earlier correlation methods ranged from 5–10%; scatter around the new correlation varied from 6–9% over the same data subset. A length-scale dependence was identified in a Stanton number previously defined using a near-wall streamwise velocity fluctuation, St′. A new near-wall Stanton number was introduced; this parameter was regarded as a constant in a two-region boundary layer model on which the new correlation is based.
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April 2003
Technical Papers
Heat Transfer In Turbulent Boundary Layers Subjected to Free-Stream Turbulence—Part II: Analysis and Correlation
Michael J. Barrett, Mem. ASME,,
Michael J. Barrett, Mem. ASME,
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383
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D. Keith Hollingsworth, Mem. ASME,
D. Keith Hollingsworth, Mem. ASME,
Department of Mechanical Engineering, University of Houston, Houston, TX 77204
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Michael J. Barrett, Mem. ASME,
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383
D. Keith Hollingsworth, Mem. ASME,
Department of Mechanical Engineering, University of Houston, Houston, TX 77204
Contributed by the International Gas Turbine Institute and presented at the National Heat Transfer Conference, Albuquerque, New Mexico, August 14–17, 1999, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the IGTI, October 29, 2002. Associate Editor: R. Bunker.
J. Turbomach. Apr 2003, 125(2): 242-251 (10 pages)
Published Online: April 23, 2003
Article history
Received:
October 29, 2002
Online:
April 23, 2003
Citation
Barrett, M. J., and Hollingsworth, D. K. (April 23, 2003). "Heat Transfer In Turbulent Boundary Layers Subjected to Free-Stream Turbulence—Part II: Analysis and Correlation ." ASME. J. Turbomach. April 2003; 125(2): 242–251. https://doi.org/10.1115/1.1538623
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