| Summary: | 碩士 === 國立臺灣海洋大學 === 系統工程暨造船學系 === 102 === In this thesis, the design procedure for energy-saving rudders is developed, and a self-developed graphic user interface is established to conduct the designs. The elements of rudders are first parameterized, and rudders can be designed by manually or automatically adjusting these parameters. In this procedure, the geometries of the rudders can be generated for boundary element method and RANS method computations. Rudders can then be designed by analysis results. For considering the effects of the ship flow, another important work of this thesis is to develop the RANS method for analyzing the ship flow field under OpenFOAM platform. To validate the developed method, two ship hulls, KVLCC2M and KCS, are simulated and compared to the experimental data, and the forces and flow fields are close to experiments. The self-developed graphic user interface and RANS method are integrated, and 18 different rudder geometries are generated. By using the wake of simulated hull as the inflow of the propeller and rudders, the boundary element methods are then used to analyze the interactions of propellers and rudders. The effects of geometric parameters on the performance are then investigated for designs. The design results show that the presented design process is applicable and trustworthy. This work has established basic functions of designing energy-saving rudders considering the whole ship flow field. The established tool is expected to assist the energy-saving rudder designs effectively, and to further improve the accuracy and quality of rudder designs.
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