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Compressible flow past a contour and stationary vortices

Published online by Cambridge University Press:  21 April 2006

A. Barsony-Nagy ,
J. Er-El  and
S. Yungster
A. Barsony-Nagy
Affiliation:
Department of Aeronautical Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
J. Er-El
Affiliation:
Department of Aeronautical Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
S. Yungster
Affiliation:
Department of Aeronautical Engineering, Technion – Israel Institute of Technology, Haifa 32000, Israel
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Abstract

The Rayleigh-Janzen expansion method is extended to plane and steady flows which contain one or more point vortices interacting with a smooth or sharp-edged obstacle. A uniformly valid approximate solution of the compressible-flow equations is deduced by applying a perturbation method and by using matched asymptotic expansions to solve the resulting singular perturbation problem. The method yields compressibility corrections for the vortex positions and for the velocities. Results are presented for the flow past a circle and a pair of symmetric vortices (Föppl's flow). They show that the compressibility effects are substantial and are consistent with experimental data.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 178 , May 1987 , pp. 367 - 378
Copyright
© 1987 Cambridge University Press

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