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TECHNICAL BRIEFS

Effects of Streamwise Vortices on Laminar Boundary-Layer Flow

[+] Author and Article Information
T. K. Fannelop

Aerophysics Department, Research and Technology Laboratories, AVCO Space Systems Division, Wilmington, Mass.

J. Appl. Mech 35(2), 424-426 (Jun 01, 1968) (3 pages) doi:10.1115/1.3601221 History: Received April 24, 1967; Online September 14, 2011

Abstract

The effects of periodic transverse velocity fluctuations are investigated for boundary-layer flow over a flat plate. The method used is a perturbation expansion of the three-dimensional boundary-layer equations in terms of the small transverse velocity component. The equations are reduced to similarity form by means of suitable transformations. The second-order terms are expressed in terms of the first-order (Blasius) variables and are found to increase linearly with the streamwise coordinate. The present heat-transfer solution agrees with the more qualitative results of Persen. The derived velocity profiles are in exact agreement with the results of Crow’s more elaborate analysis based on the Navier-Stokes equations.

Copyright © 1968 by ASME
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