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Yacht Research Unit Kiel - Graf, K. and Mueller, O.: Der Twist-Flow-Windkanal der Yacht Research Unit Kiel, Proc. 25th Symposium Yacht Design and Yacht Construction, Hamburg, 11/05
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Graf, K. and Mueller, O.: Der Twist-Flow-Windkanal der Yacht Research Unit Kiel, Proc. 25th Symposium Yacht Design and Yacht Construction, Hamburg, 11/05

Abstract:
A velocity prediction program (VPP) has been developed at the UAS Kiel, which implements a new method to model the hydrodynamic forces acting on the hull and appendages of a sailing yacht. Based on linear wing theory the model allows the derivation of a set of hydrodynamic coefficients for the VPP from a limited set of towing tank test runs. This approach makes the new VPP, called AVPP, in particular suitable to serve as a towing tank post-processor. The paper describes AVPP, the hydrodynamic model and the math behind the derivation of hydrodynamic coefficients from tank test results. Two examples are shown: a study of the impact of the ACC V4/V5 rule changes and a comparison of a canting keel and a conventional keel yacht.




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