REVIEW ARTICLES: Receptivity Phenomena

Boundary Layer Receptivity Theory

[+] Author and Article Information
E. J. Kerschen

Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ 85721

Appl. Mech. Rev 43(5S), S152-S157 (May 01, 1990) doi:10.1115/1.3120795 History: Online April 30, 2009


The receptivity mechanisms by which free-stream disturbances generate instability waves in laminar boundary layers are discussed. Free-stream disturbances have wavelengths which are generally much longer than those of instability waves. Hence, the transfer of energy from the free-stream disturbance to the instability wave requires a wavelength conversion mechanism. Recent analyses using asymptotic methods have shown that the wavelength conversion takes place in regions of the boundary layer where the mean flow adjusts on a short streamwise length scale. This paper reviews recent progress in the theoretical understanding of these phenomena.

Copyright © 1990 by American Society of Mechanical Engineers
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