Numerical simulations of submarine self-propulsion flows near the free surface

Abstract Submarine needs to complete more tasks near the free-surface area in modern war. When sailing free surface, self-propelled characteristics of submarine and its nearby flow field will be affected by surface. This paper presents research on self-propulsion surface with computational fluid dynamics (CFD) method. We take generic Joubert BB2 Marine 7371R propeller models as objects. The RANS method SST k-ω turbulence model are selected solve turbulent flows. volume (VOF) is used capture Grid convergence study performed based three sets grids different resolution. Numerical simulations under cases submergence depths velocities. proportional integral (PI) controller proposed obtain point. results accurate compared traditional one. It found that decrease depths, rotating speed point corresponding thrust increase. also explores effect characteristics, wave-making vortex structures. scientific findings provide some useful for submarines support further future.