To reach a port, ship must pass through shallow water zone where seabed effects alter the hydrodynamics acting on ship. This study examined maneuvering characteristics of an autonomous surface at 3-DOF (Degree freedom) motion in deep and based in-port speed 1.54 m/s. The CFD (Computational fluid dynamics) method was used as specialized tool naval RANS (Reynolds-averaged Navier-Stoke) solver for...

Ducted propeller is a kind of special widely used in unmanned underwater vehicles, its flow characteristics and hydrodynamic noise are very important for marine environmental protection equipment concealment. The hybrid techniques based on the acoustic analogy theory adopted present study to calculate unsteady field sound ducted propeller. full scale filed hydro-acoustic sources propulsion syst...