18.5ft급 경기용 배스보트의 주요제원 선정에 관한 수치해석 연구

Recently, bass fishing has become a marine leisure sport in Korea. There are 4 major fishing associations in Korea, and each association holds 10-15 tournaments each year. However, supply of 17 ft bass boats, which are preferred in leagues, depends 100 % on imports. In this study, we have derived the main specifications to develop the initial hull forms of a 18.5ft bass boat through statistical analysis based on mothership data. In addition, CFD numerical analysis was carried out according to deadrise angle and longitudinal center of gravity, which strongly influenced the resistance and planing performance. For numerical analysis, design speed was set to Fn = 3.284 (Re = 9.858 × 107), the deadrise angle was set from 12 to 20°, and the longitudinal center of gravity was set in the range of 0 to 8 % LwL from the center of buoyancy to the stern. Based on the numerical results, we first set the range of these factors by resistance performance and immersion keel length. Furthermore, using a correlation graph of Savitsky's Drag-Lift ratio, we derived the deadrise angle (14-16°) and longitudinal center of gravity (4-6 % LwL).