Abstract
The twin-screw fully appended ONR Tumblehome ship model is numerically studied for the standard 10/10 zigzag maneuver. Simulations are carried out using naoe-FOAM-SJTU, a CFD solver developed on open source platform, OpenFOAM. Overset grid technique and 6DoF module with a hierarchy of bodies are applied to solve the motions of the free-running ship with twin rotating propellers and turning rudders. The self-propulsion point is using the constant value obtained by the previous CFD simulation of the twin-screw self-propelled ship in calm water. Simulations of the standard zigzag maneuver in both calm water and different incident waves are considered. The present CFD results agree well with the available experimental measurement for both ship motions and the main parameters of zigzag maneuver. This indicates that the direct simulations for ship zigzag maneuver in waves utilizing present methods are feasible and reliable. In addition, it is found that unsteady effects of the hydrodynamic loads on the free-running ship during zigzag maneuver in waves is noticeable. Furthermore, flow visualizations in different incident waves are presented so as to give a better understanding of the wave influences on free-running ship maneuver.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
