Development of a multiphase solver for cavitation flow near free surface

摘要

A multiphase cavitation solver which is capable of dealing with multiple phase change processes is developed based on OpenFOAM platform. The solver is first applied to a high-speed projectile near the free surface. Good agreement is observed for the free surface elevation and the cavitation development process with the experimental data. Then simulations are carried out for a newly designed surface-piercing body which is composed of a cavitating hydrofoil and an underwater axisymmetric body. The flow field and hydrodynamics is investigated for the vertical surface-piercing hydrofoil with different wet depth and inflow vapor cavitation number. The wave patterns downstream of the hydrofoil and the splash jet shape on the hydrofoil surface are obtained. Furthermore, the interaction between phases and the hydrodynamic curves are analyzed in detail. Finally, the combined body effect on the free surface elevation and the hydrofoil dynamics is investigated. The obtained result gives valuable insight into the optimum design for the surface-piercing body.