Vortex flows in open cylindrical-section cavities
Vortex flows in open cylindrical-section cavities
Flow within a large-aspect-ratio cylindrical vortex cell has been explored experimentally. The flow was driven by a shear layer above an opening in the cylinder circumference. Reynolds numbers, based on the length of the opening and the velocity just outside it, exceed 50,000. It is shown that the expected solid body rotation within the cell, with a constant velocity gradient across most of the core, is qualitatively present, but is significantly distorted by three-dimensional effects. Nonetheless, turbulence levels within the core are very low, only rising to levels similar to those in regular turbulent shear flows within the driving mixing layer itself and the cell-wall boundary layers.
485-497
Savelsberg, Ralph
89477d47-a40d-486f-b8d7-ef6a695ed983
Castro, Ian
66e6330d-d93a-439a-a69b-e061e660de61
March 2009
Savelsberg, Ralph
89477d47-a40d-486f-b8d7-ef6a695ed983
Castro, Ian
66e6330d-d93a-439a-a69b-e061e660de61
Savelsberg, Ralph and Castro, Ian
(2009)
Vortex flows in open cylindrical-section cavities.
Experiments in Fluids, 46 (3), .
(doi:10.1007/s00348-008-0575-4).
Abstract
Flow within a large-aspect-ratio cylindrical vortex cell has been explored experimentally. The flow was driven by a shear layer above an opening in the cylinder circumference. Reynolds numbers, based on the length of the opening and the velocity just outside it, exceed 50,000. It is shown that the expected solid body rotation within the cell, with a constant velocity gradient across most of the core, is qualitatively present, but is significantly distorted by three-dimensional effects. Nonetheless, turbulence levels within the core are very low, only rising to levels similar to those in regular turbulent shear flows within the driving mixing layer itself and the cell-wall boundary layers.
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Published date: March 2009
Organisations:
Aerodynamics & Flight Mechanics
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Local EPrints ID: 66713
URI: http://eprints.soton.ac.uk/id/eprint/66713
ISSN: 0723-4864
PURE UUID: e96a571f-1b25-49db-a1ce-7f941ecf7040
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Date deposited: 13 Jul 2009
Last modified: 13 Mar 2024 18:35
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Author:
Ralph Savelsberg
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