仿蝌蚪游动的数值研究  

A 3D Numerical Study on Bio-Inspired Tadpole Swimming

作　　者：李婷婷 胡文蓉[1,2,3] LITingting;HUWenrong(Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China;Shanghai Jiao Tong University and Chiba University International Cooperative Research Center, Shanghai Jiao Tong University, Shanghai 200240, China;MOE Key Laboratory of Hydrodynamics, Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]上海交通大学工程力学系,上海200240 [2]上海交通大学与千叶大学国际合作研究中心,上海200240 [3]水动力学教育部重点实验室,上海200240

出　　处：《力学季刊》2019年第2期243-251,共9页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(11472173)

摘　　要：通过求解三维粘性非定常不可压缩流体Navier-Stokes方程组,数值模拟了仿蝌蚪游动时的水动力学特性和流场特征,分析了蝌蚪摆动频率和雷诺数等运动参数和流场条件对蝌蚪游动的影响.此外,探讨了蝌蚪特有的钝体头部以及摆动方式的影响.结果表明,蝌蚪游动时不同的受力状态对应于不同的尾涡结构特征.蝌蚪特殊的运动方式与其特殊的体态特征是相匹配的.In this study, bio-inspired tadpole swimming is investigated numerically by solving the three-dimensional Navier-Stokes equations for the unsteady incompressible viscous flow. The hydrodynamics and vortex structures in the flow field are analyzed.The influence of various controllable parameters is studied. Also, the effect of tadpole’s blunt snout and its specific kinematics is discussed in detail. The results show that the wake vortex structures vary with the fluid force on the tadpole. In addition, the kinematics of tadpoles is closely matched to their special shape.

关 键 词：三维 蝌蚪 数值模拟 

分 类 号：O35[理学—流体力学]