Numerical Calculation Of Resistance For Displacement Ship On Waves-current Actions

In nature, the process of wave propagation is usually accompanied with currents. Theexistence of currents leads to wave deformation and can change wave spectrum parameters. Foridentified parameters of wave and current, the nonlinear wave-current interaction changes theoriginal wave-flow field. Wave and flow will play a dual role at the ship during the voyage, andhave resisting impact on the ship. With the rapid development of the application ofComputational Fluid Dynamics (CFD) in ship design, more and more scholars have conductedresearch from different aspects. The flow around a ship is a complex three-dimensional flow, andmeanwhile, the viscous flow near the ship wall is very complicated, which, plus the free surface,increases the complexity of the problem.In this thesis, there is the research on physics wave-generating moving plane method andgiven inlet method which are outstanding in the numerical wave-making technology. The threedimensional numerical wave-making method was discussed by combining with the user definedfunction.The simulation of the three-dimensional viscous flow around the free surface of a ship hullwas carried out. The resistance was counted, and the impact of parameters of hull shape on it wasanalyzed. Thus, the feasibility of the numerical computation of ship resistance was verified bythe comparison between the computation results and the towing tank test and ITTC.The ship resistance in wave-current interaction was presented here on the basis of thenumerical generation of wave, and the ship wave added resistance was obtained. The numericalresults were compared with the results from the potential flow theory and strip theory. That couldprovide important reference to the numerical method in a complex environment.