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Goertler instability on an airfoilAn effective computational scheme was developed to study the growth/damping of Goertler vortices along walls of variable curvature. Computational experiments indicate that when the amplification rates for the u-, v-, and w-perturbations are the same, the finite difference approach to solve the initial value problem and the normal mode approach give identical results for the Blasius boundary layer on constant curvature concave walls. The growth of Goertler vortices was rapid in the concave regions and was followed by sharp damping in the convex region. However, multiple sets of counter-rotating vortices were formed and remained far downstream in the convex region. The current computational scheme can be easily extended to more realistic problems including variable pressure gradients and suction effects.
Document ID
19900003201
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kalburgi, Vijay (Old Dominion Univ. Norfolk, VA., United States)
Mangalam, Siva M. (AS&M, Inc., Hampton VA., United States)
Dagenhart, J. Ray (NASA Langley Research Center Hampton, VA., United States)
Tiwari, S. N. (Old Dominion Univ. Norfolk, VA., United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1987
Publication Information
Publication: Research in Natural Laminar Flow and Laminar-Flow Control, Part 1
Subject Category
Aerodynamics
Accession Number
90N12517
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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