Numerical Simulation of the Launch Stage in Vertical Plane of Underwater Glider in Ocean Current

The movement during the launch stage of the underwater glider is unsteady, and the unsteady movement is very easy to lose stability in current. CFD method which is based on the fully structured overlapping grid technology is adopted to study the movement of the underwater glider during the launch stage. The finite difference method is used to discretize SST k-ω turbulence model. The spatial position and attitude of underwater glider is updated by solving 3DOF equations of vertical plane in time domain. The velocity, displacement and attitude of the underwater glider at different ocean currents are given in time domain at 1% difference of gravity and buoyancy. The results show that the ocean current has a great influence on the motion of the glider.