Calculation of Unsteady Turbulent Boundary Layers

[+] Author and Article Information
O. K. Kwon

Allison Gas Turbine Division, General Motors Corporation, Indianapolis, IN

R. H. Pletcher

Department of Mechanical Engineering and Computational Fluid Dynamics Center, Iowa State University, Ames, IA

R. A. Delaney

Computational Fluid Dynamics, Allison Gas Turbine Division, General Motors Corporation, Indianapolis, IN

J. Turbomach 110(2), 195-201 (Apr 01, 1988) (7 pages) doi:10.1115/1.3262180 History: Received February 04, 1987; Online November 09, 2009


An unsteady, two-dimensional boundary-layer solution procedure is used to predict two different types of incompressible turbulent mean flows, the Blasius and Howarth flows, with superimposed time-dependent harmonic oscillations. A simple algebraic mixing length model that includes a minor modification for unsteadiness in the inner part of the boundary layer was used. Computed results for the two different mean flows over a wide range of unsteady conditions are presented and compared with measured data and other numerical solutions. The overall agreement of the present solutions with measurements is very good, although details of unsteady characteristics are not completely resolved due to shortcomings in the closure model.

Copyright © 1988 by ASME
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