Application of RANS to the hydrodynamics of bilge keels and baffles
Application of RANS to the hydrodynamics of bilge keels and baffles
This investigation first focuses on modelling the flow around cantilever plates in normal oscillation, providing key guidance for attaining sufficient accuracy for most engineering applications, in terms of turbulence modelling, mesh refinement and time step selection. The modelling approach is then applied to the hydrodynamics of a ship-like section fitted with vertical bilge keels, rolling at free surface. The results obtained from RANS are compared to available experimental data and predictions obtained from potential flow analysis. Viscous effects arising from the presence of the bilge keels are shown to influence more hydrodynamic coefficients than just roll fluid damping. Finally, empirical formulae commonly used to allow for the influence of viscous roll damping are compared to RANS predictions and experimental data.
169-178
Royal Institution of Naval Architects
Quérard, A. B.G.
ecb2d03f-6fcc-41e2-9fd7-bf53a91daee4
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Turnock, S. R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
24 November 2010
Quérard, A. B.G.
ecb2d03f-6fcc-41e2-9fd7-bf53a91daee4
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Turnock, S. R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Quérard, A. B.G., Temarel, P. and Turnock, S. R.
(2010)
Application of RANS to the hydrodynamics of bilge keels and baffles.
In RINA, Royal Institution of Naval Architects - William Froude Conference: Advances in Theoretical and Applied Hydrodynamics - Past and Future, Papers.
Royal Institution of Naval Architects.
.
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Conference or Workshop Item
(Paper)
Abstract
This investigation first focuses on modelling the flow around cantilever plates in normal oscillation, providing key guidance for attaining sufficient accuracy for most engineering applications, in terms of turbulence modelling, mesh refinement and time step selection. The modelling approach is then applied to the hydrodynamics of a ship-like section fitted with vertical bilge keels, rolling at free surface. The results obtained from RANS are compared to available experimental data and predictions obtained from potential flow analysis. Viscous effects arising from the presence of the bilge keels are shown to influence more hydrodynamic coefficients than just roll fluid damping. Finally, empirical formulae commonly used to allow for the influence of viscous roll damping are compared to RANS predictions and experimental data.
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Published date: 24 November 2010
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Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
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William Froude Conference: Advances in Theoretical and Applied Hydrodynamics - Past and Future, , Portsmouth, United Kingdom, 2010-11-24 - 2010-11-25
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Local EPrints ID: 449096
URI: http://eprints.soton.ac.uk/id/eprint/449096
PURE UUID: 44b663d6-05d4-46d1-985f-6611c2048dbc
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Date deposited: 17 May 2021 16:32
Last modified: 19 Jul 2022 01:36
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Author:
A. B.G. Quérard
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