An Inviscid-Viscous Interaction Approach to the Calculation of Dynamic Stall Initiation on Airfoils

[+] Author and Article Information
T. Cebeci, H. M. Jang, H. H. Chen

Aerospace Engineering Department, California State University, Long Beach, Long Beach, CA 90840

M. F. Platzer

Department of Aeronautics and Astronautics, Naval Postgraduate School, Monterey, CA 93943

J. Turbomach 115(4), 714-723 (Oct 01, 1993) (10 pages) doi:10.1115/1.2929307 History: Received February 11, 1992; Online June 09, 2008


An interactive boundary-layer method is described for computing unsteady incompressible flows over airfoils, including the initiation of dynamic stall. The inviscid unsteady panel method developed by Platzer and Teng is extended to include viscous effects. The solutions of the boundary-layer equations are obtained with an inverse finite-difference method employing an interaction law based on the Hilbert integral, and the algebraic eddy-viscosity formulation of Cebeci and Smith. The method is applied to airfoils subject to periodic and ramp-type motions and its abilities are examined for a range of angles of attack, reduced frequency, and pitch rate.

Copyright © 1993 by The American Society of Mechanical Engineers
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