无人帆船柔性风帆性能的流固耦合仿真分析  

Fluid-Structure Interaction Simulation Analysis on the Flexible Sail Performance of an Unmanned Sailboat

作　　者：方泽江 谭俊哲[1,2] 纪光英 袁鹏[1,2] 孙泽 王树杰[1,2] Fang Zejiang;Tan Junzhe;Ji Guangying;Yuan Peng;Sun Ze;Wang Shujie(College of Engineering,Ocean University of China,Qingdao 266100,China;Qingdao Municipal Key Laboratory of Ocean Renewable Energy,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]中国海洋大学海洋工程重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2023年第5期136-143,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(51779238)资助。

摘　　要：为了探究柔性风帆在不同风况下的变形结果及变形对气动性能的影响,本研究中进行柔性风帆性能的流固耦合仿真分析:构建1.4 m无人帆船主帆初始形状模型和材料模型,并基于LS-DYNA程序对柔性风帆在不同攻角下进行变形计算,构建变形后的风帆形状;基于STAR CCM+程序在相同条件下对变形风帆和初始风帆进行气动性能计算。结果表明:柔性风帆变形结果主要表现为拱度变化和有效攻角变化,材料本身的拉伸对拱度变化的影响可以忽略不计;当拱度增大带来的升力增大效应强于有效攻角减小带来的升力减小效应时,升力总体上为增大;变形风帆的升力系数随着攻角的变化而更为合理、升阻更大;根据变形风帆的极曲线,获得不同航向角下的最佳攻角和最大推力系数,适用于优化柔性风帆无人帆船横风航行时的控帆策略。In order to identify the deformation results of the flexible sail in different wind conditions and the effect of the deformed sails on the aerodynamic performance,fluid-structure interaction(FSI)simulation analysis on the flexible sail performance is performed.The initial shape model and material model are constructed for main sail of the 1.4 m unmanned sailboat,the deformation calculations are performed for the flexible sail at different attack angles based on LS-DYNA,and the shapes of deformed sail are constructed.STAR-CCM+is applied to calculate the initial and deformed sails performance in same conditions.The results show that the deformation results of the flexible sail are mainly the change of the cambered shape and the effective attack angle,the stretching of the sail material under wind pressure is negligible for camber change.When compared the increase in the lift force by the deeper camber with the decrease in the lift force by the smaller the effective attack angle,the former is stronger,the lift force increases overall.The lift coefficient of the deformed sail is more reasonable with the change of the attack angle,and the lift-drag ratio is larger.According to the polar curve of the deformed sail,the optimal attack angles and maximum driving force coefficients at different heading angles are obtained,which is suitable for application to optimization the sailing control strategies of unmanned sailboats with flexible sails in crosswind conditions.

关 键 词：无人帆船 柔性风帆 流固耦合 LS-DYNA程序 STAR-CCM+程序 空气动力学性能 

分 类 号：U661.1[交通运输工程—船舶及航道工程]