In this paper, two design procedures of the Floating Kuroshio Turbine blade geometries are presented. The first one is similar to the propeller design method, the lifting line method is used for the design of the loading distribution, and the lifting surface method is then adopted for the blade geometry design. The second design procedure uses Genetic Algorithm method to design the turbine blade geometry. Hydrodynamic performances of the marine current turbine are then computed and analyzed by the potential flow boundary element method and the viscous flow RANS method. The design of a 20kW floating type current turbine is demonstrated in the paper, and the design results show the geometries designed by the presented procedures satisfy the design goal. It is believed that both methods are applicable for the current turbine blade designs.

針對浮游式黑潮渦輪機的開發，本論文探討20kW對轉渦輪機葉片的設計，我們提出渦輪機葉 片的兩種設計方法。第一種方法與螺槳葉片設計法類似，我們先用升力線法設計負荷分布，再用升 力面法設計葉片幾何；第二種方法則採用基因演算法來進行葉片幾何的設計。待葉片設計完成之 後，我們運用勢流邊界元素法與RANS法分析洋流渦輪機的水動力學特性，整體成果顯示本論文兩 種設計方法所得到的葉片設計都達到設計目標，我們相信這兩種葉片設計方法皆可應用於洋流渦輪 機葉片的設計。