Three-dimensional flow in circular cavities of large spanwise aspect ratio
Three-dimensional flow in circular cavities of large spanwise aspect ratio
Experimental data are presented for the vortex flow in a nominally two-dimensional circular cavity. The vortex is driven by a separated shear layer along an open section of the cavity circumference. It is shown that the core vortex flow is perturbed three-dimensionally. An inviscid analysis of an ideal core (solid body) vortex is given and it is shown that this flow contains a steady perturbation whose characteristics are almost exactly those identified in the experiments. Viscous effects reduce (by a few per cent) the spanwise wavelength of the perturbation and also lead, via spatial variations in Reynolds stress, to a modification of the core flow so that the radial profile of the circumferential velocity is ‘S’-shaped, rather than linear
551-574
Tutty, Owen
c9ba0b98-4790-4a72-b5b7-09c1c6e20375
Savelsberg, Ralph
89477d47-a40d-486f-b8d7-ef6a695ed983
Castro, Ian P.
66e6330d-d93a-439a-a69b-e061e660de61
2012
Tutty, Owen
c9ba0b98-4790-4a72-b5b7-09c1c6e20375
Savelsberg, Ralph
89477d47-a40d-486f-b8d7-ef6a695ed983
Castro, Ian P.
66e6330d-d93a-439a-a69b-e061e660de61
Tutty, Owen, Savelsberg, Ralph and Castro, Ian P.
(2012)
Three-dimensional flow in circular cavities of large spanwise aspect ratio.
Journal of Fluid Mechanics, 707, .
(doi:10.1017/jfm.2012.301).
Abstract
Experimental data are presented for the vortex flow in a nominally two-dimensional circular cavity. The vortex is driven by a separated shear layer along an open section of the cavity circumference. It is shown that the core vortex flow is perturbed three-dimensionally. An inviscid analysis of an ideal core (solid body) vortex is given and it is shown that this flow contains a steady perturbation whose characteristics are almost exactly those identified in the experiments. Viscous effects reduce (by a few per cent) the spanwise wavelength of the perturbation and also lead, via spatial variations in Reynolds stress, to a modification of the core flow so that the radial profile of the circumferential velocity is ‘S’-shaped, rather than linear
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Published date: 2012
Organisations:
Engineering Science Unit, Aeronautics, Astronautics & Comp. Eng
Identifiers
Local EPrints ID: 342787
URI: http://eprints.soton.ac.uk/id/eprint/342787
ISSN: 0022-1120
PURE UUID: eeaacbb2-f1a4-4202-a00c-395b0723ba67
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Date deposited: 13 Sep 2012 13:35
Last modified: 14 Mar 2024 11:54
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Author:
Owen Tutty
Author:
Ralph Savelsberg
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