Hostname: page-component-7dd5485656-hw7sx Total loading time: 0 Render date: 2025-10-30T05:29:49.814Z Has data issue: false hasContentIssue false
  • English
  • Français

Flow around a circular cylinder near a plane boundary

Published online by Cambridge University Press:  19 April 2006

P. W. Bearman  and
M. M. Zdravkovich
P. W. Bearman
Affiliation:
Department of Aeronautics, Imperial College, London
M. M. Zdravkovich
Affiliation:
Department of Aeronautical and Mechanical Engineering, University of Salford, England
Get access Rights & Permissions [Opens in a new window]

Abstract

The flow around a circular cylinder placed at various heights above a plane boundary has been investigated experimentally. The cylinder spanned the test section of a wind tunnel and was aligned with its axis parallel to a long plate and normal to the free stream. It was placed 36 diameters downstream of the leading edge of the plate and its height above the plate was varied from zero, the cylinder lying on the surface, to 3·5 cylinder diameters. The thickness of the turbulent boundary layer on the plate at the cylinder position, but with it removed from the tunnel, was equal to 0·8 of the cylinder diameter. Distributions of mean pressure around the cylinder and along the plate were measured at a Reynolds number, based on cylinder diameter, of 4·5 × 104. Spectral analysis of hot-wire signals demonstrated that regular vortex shedding was suppressed for all gaps less than about 0·3 cylinder diameters. For gaps greater than 0·3 the Strouhal number was found to be remarkably constant and the only influence of the plate on vortex shedding was to make it a more highly tuned process as the gap was reduced. Flow-visualization experiments in a smoke tunnel revealed the wake structure at various gap-to-diameter ratios.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 89 , Issue 1 , 14 November 1978 , pp. 33 - 47
Copyright
© 1978 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Bearman, P. W. & Wadcock, A. J. 1973 The interaction between a pair of circular cylinders normal to a stream. J. Fluid Mech. 61, 495–511.Google Scholar
Bloor, S. 1964 The transition to turbulence in the wake of a circular cylinder. J. Fluid Mech. 19, 290–304.Google Scholar
Brown, G. L. & Roshko, A. 1974 On density effects and large structure in turbulent mixing layers. J. Fluid Mech. 64, 775–816.Google Scholar
Davies, M. E. 1974 Spectral analysis programs Powspec and Cophase. Imperial Coll. Aero. Tech. Note no. 74–103.Google Scholar
Göktun, S. 1975 The drag and lift characteristics of a cylinder placed near a plane surface. M.Sc. thesis, Naval Postgraduate School, Monterey, California
Quadflieg, H. 1977 Wirbelinduzierte Belastungen eines Zylinderpaares in inkompressibler Strömung bei grossen Reynoldszahlen. Forsch. Ing.-Wesen 43, 9–18.Google Scholar
Roshko, A., Steinolfson, A. & Chattoorgoon, V. 1975 Flow forces on a cylinder near a wall or near another cylinder. Proc. 2nd US Conf. Wind Engng Res., Fort Collins, paper IV–15.
Taneda, S. 1965 Experimental investigation of vortex streets. J. Phys. Soc. Japan 20, 1714–1721.Google Scholar
Zdravkovich, M. M. 1977 Review of flow interference between two circular cylinders in various arrangements. Trans. A.S.M.E., J. Fluids Engng 99, 618–633.Google Scholar