An article dealing with the optimisation of wing sail through a CFD-based method founded on RBF mesh morphing coupled to a Velocity Prediction Program (VPP) was submitted to the 5th High Performance Yacht Design Conference (HPYD5) that will be held in March from 10th to 12th 2014 at the University of Auckland.

HYPD5 will cover all topics relating to high performance power and sailing yachts, and it is organised under the auspices of The Royal Institute of Naval Architects (RINA) of NZ and the University of Auckland.

Abstract “A CFD-Based Wing Sail Optimisation Method Coupled to a VPP”

An aerodynamic numerical optimisation procedure for an AC72 rigid wing sail was developed.

The core of the methods is the geometric parameterisation strategy based on mesh morphing technique.

The morphing action, which uses radial basis functions, is integrated within the Reynolds-averaged Navier-Stokes solver and provides an efficient parametric sail aerodynamic analysis method which is integrated in an optimisation environment based on a velocity prediction program.

A hydrodynamic model is coupled to the parametric numerical solver in an iterative procedure.

The shape modifiers operate on angle of attack and twist of the fore and aft wing element.

For each true wind conditions, the velocity of the boat is maximised iterating between the solution of theย velocity prediction program and the solution of the fluid dynamic solver.

The effectiveness of the proposed method is demonstrated testing a range of wind speeds and different possible wing planforms.