Mechanical eng., Malekashtar Univ of Tech
Marine Engineering Department, Amirkabir University of Technology
This article describes a 3D CFD (computational fluid dynamics) simulation implementation of the stepped planning hull in calm water. The turbulent free surface flow around the stepped planing hull is computed with a RANSE method, using the solver ANSYS-CFX. The turbulence model used is standard k–ε. In order to simulate the disturbed free surface, VOF model is implemented. The CFD model has been firstly validated using the available experimental data. The numerical results of drag, pressure distribution, wetted surface, water spray, wake profile and wave generated by the planing hull are presented and discussed at various speeds. Wake profiles calculated from present model are also compared with the ones calculated from Savitsky’s emprical equations at different speeds.