VPP Coupling High-Fidelity Analyses and Analytical Formulations for Multihulls Sails and Appendages Optimization

A procedure for the optimization of a catamaran’s sail plan able to provide preliminary optimal appendages configuration is described. The method integrates parametric CAD model, an automatic computational domain generator and Velocity Prediction Program (VPP) based on combination RANS computations analytical models. sailing speed course angle are obtained, with iterative process, solving forces moment equilibrium system equations. Analytical formulations hull were developed tuned against matrix CFD solutions. aerodynamic polars estimated by applying design criteria from aerospace literature. permits us find configuration, rudders setting, planform, shape trim that maximise VMG (Velocity Made Good). Two versions analysis module implemented: one adopting commercial software use only Open-Source codes. solutions two modules compared evaluate advantages limitations approaches.