Pressure distribution on planing hull bottom with stern interceptor

Abstract

The fluid-structure interaction has been an interesting problem in the recent years. Sufficiently great work has been done on the planing hulls and the pressures acting on the bottom of these hulls. The pressure on the bottom of planing hull is evaluated by Morabito empirical method and by numerical simulations performed using Reynolds Averaged Navier Stokes (RANS) based Computational Fluid Dynamics (CFD) software. The total resistance and trim are compared with experimental values for bare hull. The pressure distribution on the bottom of the hull has been assessed using Morabito's method which is applicable for deadrise angles from 0–40 deg, trim up to 30 deg and wetted length up to five beams. This paper gives some of the numerical set up characteristics using RANS solver for the hull fitted with interceptor and empirical formulations of Morabito's approach for pressure distribution on bottom surface of planing hulls. The validation for the study is undertaken by comparing numerical results with experimental data for bare hull. The results are found to have good correspondence with one another. About 50% of increase in total pressure is estimated from CFD results near the stern region at the centerline (y = 0) of the bottom for hull with interceptor.