鲤鱼尾鳍对鱼体阻力特性影响的数值模拟  

Numerical simulations on the influence of caudal fin of Cyprinus carpio on the drag characteristics of fish body

作　　者：章甘 张成春[1] 李雪丽[1] 王现宝 王晶[1] 

机构地区：[1]吉林大学工程仿生教育部重点实验室,长春130022

出　　处：《中国科技论文》2015年第4期424-428,共5页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20110061120048);国家自然科学基金资助项目(U1134109;51106062;51206058)

摘　　要：采用逆向工程方法获取了鲤鱼外形的三维点云数据,构建了鲤鱼三维模型,应用k-ωSST湍流模型对比模拟研究鲤鱼尾鳍对鱼体阻力特性的影响。结果表明:在未考虑鲤鱼表面黏性的条件下,鲤鱼摩擦阻力占总阻力的比例略大;鲤鱼尾鳍可显著减小鱼体压差阻力,来流速度为10m/s时,有尾鳍的鱼体模型压差阻力较无尾鳍的鱼体模型降低了4.95%;尾鳍在不同来流速度下均可显著减小鱼体模型压差阻力占总阻力的比例,最大减小了4%。Three-dimensional model of carp shape was built based upon the point cloud data obtained by the reverse engineering approach. The influence of caudal fin on the drag characteristics of the carp model was then studied by simulations based on the k-ω SST turbulence model at a different speed of water flows. Simulation results show that the friction drag of the carp accounts for a slightly larger proportion of the total drag and the caudal fin can significantly decrease the pressure drag of the carp model. A 4.95% reduction of pressure drag was observed on the carp model with caudal fin compared with those without caudal fin at the water flow speed of 10 m/s. Caudal fin can also reduce the pressure drag proportion of the total drag with a maximum decrease up to 4%.

关 键 词：鲤鱼 尾鳍 阻力特性 数值模拟 逆向工程方法 k-ωSST湍流模型 

分 类 号：S965.116[农业科学—水产养殖] O35[农业科学—水产科学]