Numerical Simulation of Longitudinal Motion of High Speed Craft in Calm Water

In order to accurately estimate the hydrodynamic performance of high-speed crafts sailing in calm water, a numerical method based on CFD technology was established in this paper. The method included techniques such as cutting body mesh, overlapping mesh, two-phase flow, VOF model, and 6-DOF motion model. The numerical simulation of the craft's heave and pitch coupling motion in hydrostatic water was carried out. The variation of the speed of the high-speed craft with the change of the longitudinal angle and the centre of gravity during the motion was analysed. To prove feasibility and accuracy of numerical simulation method for hydrodynamic performance of longitudinal motion of high-speed crafts, the calculated results were compared with the experimental values of the ship model.