BOT, Patrick; MARIA VIOLA, Ignazio; FLAY, Richard G.J.; BRETT, Jean-Sébastien

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BOT, Patrick
Institut de Recherche de l'Ecole Navale [IRENAV]

MARIA VIOLA, Ignazio
Newcastle University [Newcastle]

FLAY, Richard G.J.
University of Auckland [Auckland]

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Communication dans un congrès avec actes

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The Third International Conference on Innovation in High Performance Sailing Yachts, Lorient, France, The Third International Conference on Innovation in High Performance Sailing Yachts, INNOVSAIL, Lorient, France, 2013-06, Lorient. 2013-06p. 119-127

Ecole Navale

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This paper describes an experiment that was carried out in the Twisted Flow Wind Tunnel at The University of Auckland to measure a detailed set of pressure distributions on a rigid 1/15th scale model of a modern asymmetric spinnaker. It was observed that the pressures varied considerably up the height of the spinnaker. The fine resolution of pressure taps allowed the extent of leading edge separation bubbles, pressure recovery region, and effect of sail curvature to be observed quite clearly. It was found that the shape of the pressure distributions could be understood in terms of conventional aerodynamic theory. The sail performed best at an apparent wind angle of about 55°, which is its design angle, and the effect of heel was more pronounced near the head than the foot.< Réduire

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Yacht Engineering

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Wind-tunnel pressure measurements on model-scale rigid downwind sails

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