A comparative study between wind-tunnel experiments and RANS simulations of modern square headed main sails
A comparative study between wind-tunnel experiments and RANS simulations of modern square headed main sails
A commercial code (ANSYS CFX10) which is based upon Reynolds Average Navier Stokes, is used here to compare with wind-tunnel experiments of a modern ORMA60’ rig in an upwind condition. Two mainsails of different tip chord length and a head sail are tested. The flying shapes are acquired by a digital camera to feed the numerical model with the same geometry has used in the experiments. The results of the study underline the need for an extreme accuracy in the acquisition of the flying shapes. It is also noted that modelling the hull in addition to the mast and sails improve the prediction significantly. Presence of a hull tends to tangle the tip vortices generated by the sails’ foot and affect the flow up to the middle of the mast, thereby increasing both lift and drag. The effects of scaling are discussed
yacht, aerodynamic, head sails
1-10
Querard, A.B.G.
bb00a9a6-d9b0-4eee-ad4b-4f57d0d9927d
Wilson, P.A.
8307fa11-5d5e-47f6-9961-9d43767afa00
28 January 2010
Querard, A.B.G.
bb00a9a6-d9b0-4eee-ad4b-4f57d0d9927d
Wilson, P.A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Querard, A.B.G. and Wilson, P.A.
(2010)
A comparative study between wind-tunnel experiments and RANS simulations of modern square headed main sails.
International Journal of Small Craft Technology, 151 (B1), .
(doi:10.3494/rina.ijsct.2010.b1.82).
Abstract
A commercial code (ANSYS CFX10) which is based upon Reynolds Average Navier Stokes, is used here to compare with wind-tunnel experiments of a modern ORMA60’ rig in an upwind condition. Two mainsails of different tip chord length and a head sail are tested. The flying shapes are acquired by a digital camera to feed the numerical model with the same geometry has used in the experiments. The results of the study underline the need for an extreme accuracy in the acquisition of the flying shapes. It is also noted that modelling the hull in addition to the mast and sails improve the prediction significantly. Presence of a hull tends to tangle the tip vortices generated by the sails’ foot and affect the flow up to the middle of the mast, thereby increasing both lift and drag. The effects of scaling are discussed
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jsct - QUERARD-WILSON.pdf
- Author's Original
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Submitted date: 26 September 2007
Published date: 28 January 2010
Keywords:
yacht, aerodynamic, head sails
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 71770
URI: http://eprints.soton.ac.uk/id/eprint/71770
ISSN: 1740-0694
PURE UUID: dcdca564-4c81-4875-be47-7519dd31a976
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Date deposited: 04 Jan 2010
Last modified: 14 Mar 2024 02:33
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Author:
A.B.G. Querard
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