Undersea Vehicle Separation Characteristics

The characteristics of underwater separation are crucial to the success of the launch of an undersea vehicle. In this study, the underwater separation of the vehicle and barrel platform in suspend-state is investigated. The influence of ejection gas pressure and temperature on the hydrodynamic and motion characteristics of the vehicle and barrel platform during the launch is numerically simulated using a fluid volume function(VOF) multiphase flow model and dynamic mesh. The results show that the ejection gas pressure has little effect on the relative displacement between the vehicle and the barrel platform when the tail exits the barrel. Furthermore, the displacement ratio is the same as the inverse ratio of its mass. The hydrodynamic fluctuation and impact peak increase with the ejection gas pressure after the tail exits the barrel. Moreover, the temperature of ejection gas has no significant influence on the motion characteristics during the ejection. The hydrodynamic fluctuation increases with gas temperature after ejection.