基于CFD的36英尺水翼双体船阻力与运动预报

Boat Trial Validation and Resistance Prediction of a 36-Foot Hydrofoil Catamarans Using CFD

近年来,兼具双体船和水翼船优点的水翼双体船迅速发展。本文通过对一艘36英尺的水翼双体船的实船试验和CFD仿真,得出最佳的双体船水翼配置形式。本文的CFD仿真主要针对迎波状态下阻力和运动,通过STAR-CCM+进行仿真,结果显示:在相同航速下,相比没有安装水翼的双体船,安装了水翼的总阻力减小量高达26%;同时,在相同的海况下,安装水翼可以将航速提高7 kn,速度提高了21%。同时也得到了最佳的水翼配置:艉部攻角-0.2°、艏部攻角1°,在该配置下最大航速40 kn时的最低总阻力为628 kN。仿真计算结果与实船试验非常接近,表明本文所提的水翼双体船阻力和运动预报计算方法是合理可行的。

Hydrofoil catamaran boats which combine the advantages of catamaran and hydrofoil have been developing gradually in recent years.This paper aims to validate boat trial results of a 36-foot catamaran bare-hull and a hydrofoil catamaran developed by Sino Eagle Yacht Co.Ltd.(SEY)by us⁃ing theoretical-computational approach and CFD method,and finds out the most optimum configura⁃tion of a 36-foot hydrofoil catamaran.The CFD validation in this paper focuses on resistance and mo⁃tion in head waves,limited only to the sinkage and trim.The CFD simulation is performed by using STAR-CCM+developed by CD-Adapco.The result from simulation shows that the hydrofoil-catama⁃ran configuration reduces the total resistance by up to 26%in comparison with the bare hull catama⁃ran at the same speed.Furthermore,the hydrofoil catamaran can travel in a speed of 7 kn faster than the bare hull by using CFD approximation and 5 kn faster on boat trials with the same engine capacity,that is to say,the speed increases by about 21%.Configuration 2(foils AOA of stern=-0.2 deg,bow=1 deg)is found as the best configuration and has the lowest total resistance of 6.28 kN at the maximum speed of 40 kn.The boat trial result is in good agreement with CFD simulation.By all means,this method is applicable to be used as a tool to predict resistance and motion of hydrofoil catamaran crafts.