基于浸入边界法和自适应网格细化方法的胸鳍波动仿生鱼自主运动的数值模拟  

Numerical Simulation of Self-propelled Pectoral Fin Undulation Bionic Fish based on Immersion Boundary Method and Adaptive Mesh Refinement

作　　者：陈京 孔祥宇 信志强[1] CHEN Jing;KONG Xiangyu;XIN Zhiqiang(College of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学力学与材料学院,江苏南京211100

出　　处：《粉煤灰综合利用》2022年第2期90-97,共8页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金(11872174);中央高校基本科研业务费(B200202236);港口航道泥沙工程交通行业重点实验室(Yk220001-2)。

摘　　要：以鳐鱼为仿生对象,基于浸入边界法和自适应网格细化方法对胸鳍波动推进仿生鱼的自主运动进行数值模拟,目的是从机理上对这一类水生生物游动的高效性、机动性作出解释,为波动推进仿生鱼的研发改进提供一定的参考。研究结果表明:波长约为1.1倍体长的仿生鱼模型具有最高的巡游速度且纵向提升能力也最强;无论是增大波动推进仿生鱼的波动幅值还是频率,皆能提高其巡游速度和纵向提升能力;波动频率的改变对仿生鱼流场结构的影响最大,对仿生鱼巡游速度的影响也最为显著。Taking ray as the bionic object, numerical simulation was carried out on the autonomous movement of the bionic fish propelled by pectoral fin undulation based on immersion boundary method and adaptive mesh refinement method, in order to explain the high efficiency and mobility of swimming of this aquatic creature from the mechanism, and provide a certain reference for the research and development of the bionic fish propelled by undulation.The results show that the bionic fish model with the wavelength of 1.1 times of body length has the highest cruising speed and the strongest longitudinal lifting ability, either increasing the amplitude or frequency of the wave propulsion bionic fish can improve its cruising speed and longitudinal lifting ability.The change of wave frequency has the greatest influence on the flow field structure and the most significant influence on the cruising speed of bionic fish.

关 键 词：波动推进 仿生鱼 自主运动 浸入边界法 自适应网格细化 

分 类 号：O351[理学—流体力学]