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Fluctuating forces on a rigid circular cylinder in confined flow

Published online by Cambridge University Press:  11 April 2006

A. Richter  and
E. Naudascher
A. Richter
Affiliation:
Institut für Hydromechanik, Universität Karlsruhe, Germany
E. Naudascher
Affiliation:
Institut für Hydromechanik, Universität Karlsruhe, Germany
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Abstract

The fluctuating lift and drag acting on a long, rigidly supported circular cylinder placed symmetrically in a narrow rectangular duct were investigated for various blockage percentages over a wide range of Reynolds numbers around the critical value. The data obtained permit a full assessment of the effect of confinement on the mean-drag coefficient, the root-mean-square values of both the drag and the lift fluctuations, the Strouhal number of the dominant vortex shedding, and the Reynolds number marking transition from laminar to turbulent flow separation. Besides experimental information on a subject on which little is known so far, the paper provides a basis for the deduction of better correction procedures concerning the effects of blockage.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 78 , Issue 3 , 7 December 1976 , pp. 561 - 576
Copyright
© 1976 Cambridge University Press

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