非正弦俯仰运动对扑翼自主推进的影响  

Nonsinusoidal motion effect on self-propelled pitching foil

作　　者：陈晓[1,2] 黄桥高[1,2] 曹勇[1,2] 潘光 CHEN Xiao;HUANG Qiaogao;CAO Yong;PAN Guang(School of Marine Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China;Key Laboratory of Unmanned Underwater Vehicle Technology of Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]西北工业大学航海学院,陕西西安710072 [2]西北工业大学无人水下运载技术工信部重点实验室,陕西西安710072

出　　处：《华中科技大学学报（自然科学版）》2022年第4期96-101,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51879220,52001260);国家重点研究发展计划资助项目(2020YFB1313201);中央高校基本科研业务费专项基金资助项目(3102019HHZY030019,3102020HHZY030018).

摘　　要：采用数值仿真耦合求解流体动力方程与扑翼运动方程,建立扑翼-流体耦合的自主推进计算模型,数值模拟了非正弦俯仰运动下扑翼在前进方向及侧向的自主推进,研究在静水中不同运动波形及俯仰频率对自主推进速度、自主推进效率及流场结构的影响.结果表明:非正弦波形调节参数K和俯仰频率对自主推进前进速度、前进距离影响很大,提高K或频率,可增大平均前进速度、前进距离与侧向位移,并在K=2.5的方波取得平均速度最大值,相较于正弦波运动提高70.3%;自主推进效率及能量利用率随着K的减小不断增大,高频时推进效率高,低频时能量利用率高.Numerical simulation was used to couple the fluid dynamic equation and the flapping wing motion equation to establish a flapping-fluid coupling self-propulsion computation model.The longitudinal and lateral self-propulsion of a flapping wing under non-sinusoidal pitching motion was numerically simulated,and the influences of different motion waveforms and pitching frequencies in still water on self-propulsion speed,self-propulsion efficiency and flow structure were studied.Results show that the non-sinusoidal waveform adjustment parameter K and the pitch frequency have a great influence on the forward speed and forward distance of self-propulsion.Increasing K or frequency can increase the average forward speed,forward distance and lateral displacement.The maximum average speed is obtained in the square wave of K=2.5,which is 70.3%higher than that of sine wave motion.The efficiency of self-propulsion and the energy utilization rate continue to increase with the decrease of K,the propulsion efficiency is high at high frequencies,and the energy utilization rate at low frequencies is high.

关 键 词：俯仰运动 非正弦波形 自主推进 数值模拟 涡结构 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置] O351.2[自动化与计算机技术—控制科学与工程]