Ms ENHANCEMENT OF HYDRODYNAMIC PERFORMANCE WITH ENERGY SAVING DEVICES FOR PLANING HULL

Abstract

The moving planing vessel in transition mode dissipates most of the energy from hull to water in calm seas. Kelvin wave pattern is observed in calm water, which is strongly dependent on the Froude number. The results of numerical simulations are compared with experimental results, observed that the resistance of the vessel obtained from experiments for hull with interceptor is predicted closer to numerical results. The free surface of water is traced by the Volume of Fluid (VOF) method, using the overset grid method in RANSE based CFD solver. The results obtained were used to calculate the resistance components of a planing hull. The focus of this paper is to capture the resistance, trim and wave profile near the free surface at transom for different beam Froude numbers and is compared with and without integrated interceptor-flap on a high-speed planing craft with 20 deg deadrise angle. Reduction in drag, trim and the free surface wave elevation at transom is observed for the hull fitted with integrated interceptor-flap which helps further decrease in the wave resistance.