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On the phenomenon of vortex street breakdown

Published online by Cambridge University Press:  29 March 2006

William W. Durgin  and
Sture K. F. Karlsson
William W. Durgin
Affiliation:
Division of Engineering, Brown University, Providence, R.I. 02912 Present address: Department of Engineering Science and Mechanics, University of Florida, Gainesville, Florida 32601.
Sture K. F. Karlsson
Affiliation:
Division of Engineering, Brown University, Providence, R.I. 02912
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Abstract

A von Kármán vortex street generated in the usual way was subjected to a deceleration, thereby changing the ratio of longitudinal to lateral spacing between the vortices. Distortion of the individual vortices followed which resulted in annihilation of concentrated vortex regions and creation of a stationary wake flow. This wake flow was itself dynamically unstable and developed into a new vortex street of a different frequency from the initial one. The breakdown of the initial vortex street is qualitatively explained by considering the convection of a concentrated vortex region due to the motion imposed by all the other vortices.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 48 , Issue 3 , 16 August 1971 , pp. 507 - 527
Copyright
© 1971 Cambridge University Press

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References

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