Prediction of cavitating performance of a tip loaded propeller and its induced hull pressures

A numerical method solving for the diffraction potential on hull is coupled with a boundary element (BEM) to evaluate propeller-induced pressures. The BEM first implemented hydrodynamic analysis of non-cavitating/cavitating propellers in absence hull, and predicted solutions are taken as known unbounded potentials pressure calculations. tip loaded propeller (TLP) adopted model mounted under flat subject uniform inflow. TLP operated close so that infinite speed sound can be assumed, reducing frequency domain Helmholtz equation Laplace's which solved by solver. Unsteady sheet cavitation developed vortex considered calculation Several loading conditions imposed corresponding predictions patterns compared published experimental data those from unsteady full-blown Reynolds-averaged Navier–Stokes (RANS) simulations. Very good agreement achieved between measured results, especially moderately condition.