仿蝠鲼胸鳍推进执行机构水动力特性分析  

Analysis of hydrodynamic characteristics of pectoral fin actuator for bionic manta ray

作　　者：云忠[1] 蒋毅 李静[1] YUN Zhong;JIANG Yi;LI Jing(College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《合肥工业大学学报（自然科学版）》2018年第1期7-11,22,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51675524)

摘　　要：针对仿生蝠鲼机器人胸鳍推进执行机构的结构特征,文章提出了仿生蝠鲼胸鳍运动学方程和二维水动力学模型,并基于Fluent软件和动网格技术,通过编写UDF程序控制二维截面运动,对仿生蝠鲼胸鳍二维水动力模型进行求解;通过仿真与实验数据的对比,验证了该仿真方法具有很高的可信度,仿真分析得到的仿蝠鲼胸鳍推进执行机构的相关水动力学特性为仿蝠鲼胸鳍摆动机构优化设计提供了参考;研究了波幅包络线函数、急回特性和斯特哈尔数对推进性能的影响,并通过比较各参数对推力和升力的影响,最终得到仿生蝠鲼机器人胸鳍推进执行机构的部分参数选择依据。The equations of kinematic and two-dimensional hydrodynamic model are established according the structure and moving characteristics of pectoral fin actuator for the bionic manta ray.The motion is controlled by a UDF program and the hydrodynamic model is solved by using the Fluent software with dynamic mesh technology.By comparing the simulation and experimental data,it is proved that the simulation method has high reliability.Then the hydrodynamic characteristics about the pectoral fin actuator are obtained from the simulation result,which provide suggestions for the optimum design of the biomimetic pectoral fin actuator.The effect of the amplitude envelope function,quick return characteristics and Strouhal number on propulsion performance is studied.The laws about parameters selection for the design of the biomimetic pectoral fin actuator are obtained through comparing and analyzing its thrusts and lift forces yielded under different conditions.

关 键 词：蝠鲼 仿生 水动力学 仿真 

分 类 号：O35[理学—流体力学] TP24[理学—力学]