STEADY WAVES AND FORCES ABOUT A YAWING FLAT-PLATE

An analysis of the flow about a free-surface-piercing yawed plate in s teady drift, or in steady turning motion, is presented. The problem is studied by means of an inviscid rotational flow model, based on an in tegral representation for the velocity field in terms of source and su rface vorticity distributions. The related integral equations are nume rically solved by coupling a source panel technique together with the vortex lattice method for treating the surface vorticity integrals. Th e free surface conditions are linearized with respect to the double mo del lifting flow, and the vortex shedding has been modeled in a simple but effective manner. A special effort has been put in the validation of the present approach by com paring the obtained results with sever al experimental data and previous numerical computations. The keel vor tex shedding, as was expected by virtue of the low draft-to-length rat io typically encountered in naval architecture, has been found crucial for the prediction of the hydrodynamic forces on a maneuvering ship.