Unsteady RANS CFD simulations of ship manoeuvrability and course keeping control under various wave height conditions

Ships encounter different wave heights in real sea states. Various can lead to substantial changes the behaviour of a ship during manoeuvring, and hence ship's manoeuvrability waves should be accurately evaluated ensure navigational safety at sea. The aim this study is estimate height effects on manoeuvring benchmarking KRISO Container Ship (KCS) model by performing fully nonlinear unsteady RANS simulation. Three types manoeuvres were simulated with free-running KCS appended an actuator disk moving semi-balanced horn rudder using dynamic overset technique: self-propulsion, course keeping control, turning circle manoeuvres. Manoeuvring analyses carried out bow quartering range for constant length, as coupled fifth-order Stokes model. In order control deflection based manoeuvre mechanisms, feedback controller was embedded present CFD results clearly revealed that have strong effect KCS, including speeds, seakeeping behaviour, critical indices through comparative under conditions. One important finding standard parameters waves, which would help navigation officers decision-making actions waves.