Numéro : 2650 - Year : 2014

Seakeeping analysis of sailing yacht hulls and centre-board effect by BEM and CFD approaches

Giovanni BALLARDI, Liguria District of Marine technology DLTM
Dario BOOTE, University of Genova
Tatiana PAIS, University of Genova

The seakeeping of a floating body, whether in motion or simply standing still, is recently becoming a crucial part in the design and the engineering process from large passenger ships to racing sailing yachts. Offshore structure as well, are influenced by motions induce by waves. Moreover, even if the importance of the experimental tests is still undoubtedly relevant, nowadays several numerical methods allow to predict, with more or less accuracy, the boat behavior in regular and irregular wave field. The present work aims to analyze which geometrical, inertial and non-linear aspects must be taken into account in the hydrodynamic design of a sailing yacht concerning its heave, pitch and roll degrees of freedom. The analysis is performed by means of a fast Boundary Element Method (HydroStar) and a complex Reynolds Averaged Navier-Stokes CFD code (Star-CCM+). The comparison will be presented for two cruise-racer sailing yachts, trying to identify the main differences in terms of Response Amplitude Operators.

This paper is written in English

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