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RESEARCH PAPERS

Exponential Wake Structure of Heated Turbulent Boundary Layers at Elevated Levels of Free-Stream Turbulence

[+] Author and Article Information
P. Sepri

Dept. of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019

J. Heat Transfer 109(2), 336-344 (May 01, 1987) (9 pages) doi:10.1115/1.3248085 History: Received April 21, 1986; Online October 20, 2009

Abstract

The wake region of a turbulent boundary layer is demonstrated to exhibit simple exponential behavior at elevated levels of free-stream turbulence. As a predictive tool, the computer code STANCOOL has been modified to include FST effects in heated turbulent boundary layers. Preliminary comparisons with experimental data indicate improvements in computational capability, although further development of the code is required. From these comparisons, three new results are offered: (1) At elevated levels of FST, several statistical profiles in the boundary layer wake region decay exponentially into the free stream; (2) v′ T′ decays at half the rate of the mean velocity and temperature; (3) analytical expressions are provided for u′ v′ and v′ T′ in this case.

Copyright © 1987 by ASME
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