CFD를 이용한 고속 활주형선 deadrise angle 변화에 따른 선형의 저항특성 연구

Abstract

Abstract The design and analysis procedure for high-speed planing hulls, due to their performance and speed requirements, is very important. In the present study to show the validity of CFD for planing hull form design, CFD calculations are performed and compared the resistance characteristics with the model test results. Among the numerous model test results three different hull form are selected for this study. The first one is simple wedge hull. Second one is v-shaped hull with simple chine and constant deadrise angle which was used in Fridsma's experiments. The last one is warped hull which is decreasing deadrise angle along the hull length from bow to stern. The resistance characteristics of the planing hull are calculated by using Ansys 14.5 CFX VOF at each given draft, trim and speed. Through several CFD calculations the resistance characteristics can be found and it shows the good agreement with the experimental results. In order to predict the running attitude of planing hull the optimization technique MOGA(Multi-Objective Genetic Algorithm) and RSO(Response Surface Optimization) provided by Ansys 14.5 is applied. As an example, warped hull is used. The prediction results of the running attitude and the resistance are shown the good agreement with the experimental results.