Measurements of the flow over a low-aspect-ratio cylinder mounted on a ground plane
Measurements of the flow over a low-aspect-ratio cylinder mounted on a ground plane
The flow over a finite-height cylinder of aspect ratio 1, with one end mounted on a ground plane and the other end free, has been studied by means of surface flow visualisation, particle image velocimetry (PIV) and surface pressure measurements. The diameter-based Reynolds number was 200,000. The mean flow topology has been identified in three areas: the horseshoe vortex system, the separated flow over the free-end and the wake region. Evidence is shown for the existence of a three-horseshoe vortex system, while the mean flow over the free-end consists of an arch vortex with its bases on the forward half of the free-end. There are two tip vortices coming off the free-end. The wake region is found to be highly unsteady, with considerable variation from the mean flow.
10-21
Pattenden, R.J.
53740e3d-70d8-42ae-b568-d73f733bf936
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Zhang, X.
3056a795-80f7-4bbd-9c75-ecbc93085421
2005
Pattenden, R.J.
53740e3d-70d8-42ae-b568-d73f733bf936
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Zhang, X.
3056a795-80f7-4bbd-9c75-ecbc93085421
Pattenden, R.J., Turnock, S.R. and Zhang, X.
(2005)
Measurements of the flow over a low-aspect-ratio cylinder mounted on a ground plane.
Experiments in Fluids, 39 (1), .
(doi:10.1007/s00348-005-0949-9).
Abstract
The flow over a finite-height cylinder of aspect ratio 1, with one end mounted on a ground plane and the other end free, has been studied by means of surface flow visualisation, particle image velocimetry (PIV) and surface pressure measurements. The diameter-based Reynolds number was 200,000. The mean flow topology has been identified in three areas: the horseshoe vortex system, the separated flow over the free-end and the wake region. Evidence is shown for the existence of a three-horseshoe vortex system, while the mean flow over the free-end consists of an arch vortex with its bases on the forward half of the free-end. There are two tip vortices coming off the free-end. The wake region is found to be highly unsteady, with considerable variation from the mean flow.
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Published date: 2005
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Local EPrints ID: 23507
URI: http://eprints.soton.ac.uk/id/eprint/23507
ISSN: 0723-4864
PURE UUID: cc3d972b-1920-4dbb-a504-67620940fa41
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Date deposited: 20 Mar 2006
Last modified: 10 Jan 2025 02:33
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Author:
R.J. Pattenden
Author:
X. Zhang
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