Dynamic of Tunneled Planing Hulls in Waves

A tunneled planing craft is a high-speed boat with two tunnels over the hull bottom that are designed to improve vessel’s performance. Hydrodynamic performance of hulls in calm-water well-known, however, current information on wave conditions limited. In this study, different degrees freedom heave and pitch motions studied regular waves by using computational fluid dynamics (CFD) method based Unsteady Reynolds Averaged Navier-Stokes Equations (URANSE) conjunction k−ϵ turbulence model. The results demonstrate nonlinear. addition, it found dynamic responses as well occurrence portability fly-over phenomenon significantly increases Froude number grows. Fly-over resulted vertical acceleration up 5g, high impact pressure, large induced drag. At very speed, after flying water surface, when vessel re-enters water, resulting hydrodynamic load leads second motion. Since an unwanted movement adverse effects, these can provide better understanding motion one may consider future design for improving