Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-28T17:19:19.470Z Has data issue: false hasContentIssue false

Similarities Between Two-Dimensional and Axisymmetric Vortex Wakes

Published online by Cambridge University Press:  07 June 2016

J E L Simmons*
Affiliation:
Department of Engineering Science, University of Durham
Get access

Summary

This paper presents results of an investigation of the wake flow of a series of two-dimensional bluff bodies with different boundary-layer separation angles. These results are compared with the results of an earlier investigation of a similar series of axisymmetric bodies. It is found that when the same length scales characterising the wakes that were proposed for the axisymmetric case are used in the current investigation, then there is good agreement between the two cases in the variation of the length scales with boundary-layer separation angle. The universal Strouhal number previously proposed for axisymmetric bodies is derived for the two-dimensional bodies under investigation and is found to remain a constant for the different bodies, but at a different numerical value from that found for the axisymmetric bodies.

Type
Research Article
Copyright
Copyright © Royal Aeronautical Society. 1977

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.)

References

1 Roshko, A On the drag and shedding frequency of two-dimensional bluff bodies. NACA TN 3169, 1954.Google Scholar
2 Bearman, P W On vortex street wakes. Journal of Fluid Mechanics, Vol 28, pp 625641, 1967.CrossRefGoogle Scholar
3 Calvert, J R Experiments on the low-speed flow past cones. Journal of Fluid Mechanics, Vol 27, pp 273289, 1967.CrossRefGoogle Scholar
4 Fage, A Johansen, F C On the flow of air behind an inclined flat plate of infinite span. ARC R & M 1104,1927.Google Scholar
5 Hoole, B J The turbulent wake behind an inclined flat plate. Cambridge University Engineering Department PhD dissertation, 1968.Google Scholar
6 Simmons, J E L Effect of separation angle on vortex streets. Journal of the Engineering Mechanics Division, American Society of Civil Engineers, Vol 101, pp 649661, 1975.CrossRefGoogle Scholar
7 Bearman, P W Investigation of the flow behind a two-dimensional model with a blunt trailing edge and fitted with splitter plates. Journal of Fluid Mechanics, Vol 21, pp 241255, 1965.CrossRefGoogle Scholar
8 Maull, D J Young, R A Vortex shedding from bluff bodies in a shear flow. Journal of Fluid Mechanics, Vol 60, pp 401409, 1973.CrossRefGoogle Scholar
9 Stansby, P K The effects of end-plates on the base pressure coefficient of a circular cylinder. Aeronautical Journal, Vol 78, pp 3637, 1974.CrossRefGoogle Scholar
10 Tanner, M Totwasserbeeinflussungbei Keilströmungen. Deutsche Luft- und Raumfahrt, DLR FB 64-39, 1964.Google Scholar
11 Sullerey, R K Gupta, A K Moorthy, C S Similarities in the turbulent near wake of bluff bodies. AIAA Journal, Vol 13, pp 14251429, 1975.CrossRefGoogle Scholar
12 Tanner, M Druckverteilungsmessungen an Kegeln. Deutsche Luft- und Raumfahrt, DLR FB 65-09, 1965.Google Scholar
13 Bloor, M S Gerrard, J H Measurements on turbulent vortices in a cylinder wake. Proc. Roy. Soc. Series A, Vol 294, pp 319342, 1966.Google Scholar
14 Hooker, S G On the action of viscosity in increasing the spacing ratio of a vortex street. Proc. Roy. Soc. Series A, Vol 154, pp 6789, 1935.Google Scholar