A hybrid numerical method to develop America’s Cup yacht appendages |
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| Authors: | Dimitri Nicolopoulos Eric Berton Guillaume Gouvernet André Jacques |
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| Institution: | (1) AREVA Challenge, America’s Cup 2007, Port America’s Cup (Base 5), Muelle de Nazaret, 46024 Valencia, Spain;(2) UMR 6233 Institut des Sciences du Mouvement CNRS et Universite De La Mediterranee, Faculté des Sciences du Sport, CP 910, Parc scientifique et technologique de luminy, 13288 Marseille Cedex 09, France |
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| Abstract: | A method aimed at the development of an America’s Cup racing yacht bulb is developed and validated against experimental data.
The method relies heavily on Reynolds Averaged Navier Stokes computational fluid dynamics (CFD) and also factors in gravitational
and aerodynamics effects through the use of a Velocity Prediction Program. Initial extensive use of towing tank results is
made to be able to validate the CFD solution and thus develop a solid ground for predictive work. Then, in order to narrow
down the focus on bulb developments, decoupled hypotheses are made on the influence of the hull and free surface wave. The
development of a detailed performance analysis chart of a known base bulb allows the use of a relatively small series of CFD
simulations together with physical hypotheses to assess any given bulb performance relative to the known base. The discussion
of the results on a specific development highlights the promises and limitations of the method; final full scale results are
discussed and analysed as well. |
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| Keywords: | Computational fluid dynamics Numerical methods America’ s Cup Sailing Racing yacht Hydrodynamics Bulb geometries |
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