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Rotary oscillation control of a cylinder wake

Published online by Cambridge University Press:  26 April 2006

P. T. Tokumaru  and
P. E. Dimotakis
P. T. Tokumaru
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology 301–46, Pasadena, CA 91125, USA
P. E. Dimotakis
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology 301–46, Pasadena, CA 91125, USA
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Abstract

Exploratory experiments have been performed on circular cylinders executing forced rotary oscillations in a steady uniform flow. Flow visualization and wake profile measurements at moderate Reynolds numbers have shown that a considerable amount of control can be exerted over the structure of the wake by such means. In particular, a large increase, or decrease, in the resulting displacement thickness, estimated cylinder drag, and associated mixing with the free stream can be achieved, depending on the frequency and amplitude of oscillation.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 224 , March 1991 , pp. 77 - 90
Copyright
© 1991 Cambridge University Press

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