Numerical simulations and analysis of the zig-zag maneuvers of an oil tanker based on a body-force propeller

Abstract

The course change quality is a crucial measure of ships’ maneuverability and is closely related to the ship navigation safety. Research on zig-zag motion of ships is essential to voyage safety. STARCCM+ based on the ship 6-DOF motion and overset grid technology are used to numerically simulate the zig-zag maneuver of an oil tanker. To simulate the zig-zag motion, a body-force propeller model is adopted instead of the real propeller. The rotation speed of virtual propeller is controlled to achieve the steady self-propulsion state of the ship model and then the rudder turns from 10° to -10° according to the orientation of the ship model. By solving viscous flow field, the motion state and detailed flow field information of the ship model are presented. To verify the accuracy of numerical prediction results, ship model test is launched. Through comparison of results, the numerical simulation can provide reference for preliminary assessment for the course change quality of ships.