Study on Floating Motion Characteristics and Stability of Unpowered Underwater Carrier (UUC)

Abstract

The water-exit velocity and attitude of UUC are crucial for underwater launching aircraft-like payloads. To ensure that the design of the UUC is reasonable, the investigation on motion characteristics and stability of the UUC in vertical floating process are carried out. Firstly, a computational model of the UUC has been established. Then, a combination method of theoretical calculations and CFD simulations has been used to study the relationship between model parameters and hydrodynamics parameters. Finally, stability analysis has been conducted for initial heading angle of 3° and 6°. The results show that increasing the net buoyancy can allow the UUC to obtain a larger water-exit velocity, while to reduce accelerated time and distance. The designed UUC can achieve stably convergence under the disturbance of initial heading angle, indicating that the UUC has a good motion stability in vertical rising process.