Hydrodynamic Simulation of Pure Sway Tests with Ship Speed and Water Depth Effects

With the development of high performance computers, at present, many scholars make great efforts to research PMM (Planar Motion Mechanism) tests by CFD method for ship maneuvering. In this article, pure sway tests are simulated based on naoe-FOAM-SJTU solver, where the forces and moments are obtained by the RANS equations, and sinkage and trim are solved by the prescribed motion equation and free motion equations. Some simulations of the tests are carried out at zero and design speeds, and others are executed in the deep and shallow water, the ratio of water depth and draft is 4 for deep water cases, and 2 for shallow water cases. From the simulation results, at design speed, the yaw moment is a big difference from that at zero speed, and ship speed has a large impact on the center of force, which is 1.3 m over the gravity center, besides, the ship squats deeper at design speed and rises at zero speed. In shallow water, the force obviously increases and is 29.1% bigger than that in deep water, and the ship squats as well as at design speed.