Prediction of Transpired Turbulent Boundary Layers

[+] Author and Article Information
R. H. Pletcher

Department of Mechanical Engineering and Engineering Research Institute, Iowa State University, Ames, Iowa

J. Heat Transfer 96(1), 89-94 (Feb 01, 1974) (6 pages) doi:10.1115/1.3450146 History: Received November 06, 1972; Online August 11, 2010


A model for the mixing length distribution near the wall in turbulent boundary layer flow with transpiration is presented. The model is based on a new formulation of the exponential damping function originally suggested by Van Driest. The analysis used to evaluate the damping function employs the same set of assumptions successfully used by several investigators in the past to develop the law of the wall with blowing. This mixing length model is then used with the calculation method previously developed by the author to solve the governing conservation equations of mass, momentum, and energy in partial differential form. Predicted velocity profiles, skin friction coefficients, and Stanton numbers are compared with experimental results taken over a wide range of transpiration for both incompressible and compressible flows.

Copyright © 1974 by ASME
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