Pressure Measurement on the Bottom of a Wedge-Form Planing Plate

Abstract

In order to design a high speed planing hull form on the basis of modern hydrodynamics, it is necessary to clarify the flow round the hull and the pressure distribution over the bottom hull. The present paper deals with measurements of the bottom pressure distribution on a V-shaped planing plate with the length 0.754m. The 3-components, lift, drag, and moment were also measured and compared with the integrated values of the pressure distribution, showing a good agreement. Flow visualizations using tuft and alminium-powder methods were carried out to obtain the flow direction over the bottom hull. Spray root/edge lines were observed.