仿生机器鱼外形设计及流场阻力数值分析  

Shape Design and Numerical Analysis of Flow Field Resistance of Bionic Robot Fish

作　　者：耿文豹 魏永康 洪树峰 黄佳进 GENG Wenbao;WEI Yongkang;HONG Shufeng;HUANG Jiajin(Engineer College,Shantou University,Shantou 515063,China)

机构地区：[1]汕头大学工学院,广东汕头515063

出　　处：《数字海洋与水下攻防》2024年第3期318-325,共8页Digital Ocean & Underwater Warfare

摘　　要：在机器鱼设计过程中,鱼体、尾鳍的外形设计十分重要。为了研究流体阻力更小、推进效率更高的全鱼外形,以金枪鱼、海豚和旗鱼为仿生对象,建立了3种不同的机器鱼模型,运用动网格技术定义了边界条件,并用数值方法分析了3种模型在流场中的速度、鱼体受力等水动力性能。结果表明:旗鱼模型游动性能最好,相比于金枪鱼与海豚模型,行进过程中受到的阻力更小,且通过斯特罗哈尔数比较旗鱼模型推进效率更高;另一方面,新月鳍仿生鱼游动速度最高,是八字鳍仿生鱼的2.2倍左右,旗鱼新月鳍机器鱼具有更好的游动性能。计算结果对减小机器鱼流体阻力,提高其推进效率提供了较好的参考价值。In the process of robotic fish design,shape design of fish body and tail fin is very important.In order to study the shape of the whole fish with less fluid resistance and higher propulsion efficiency,three different robotic fish models are established taking tuna,dolphin and sailfish as bionic objects.Boundary conditions are defined using dynamic mesh technology.The hydrodynamic performances such as velocity and fish body force of the three models in the flow field are analyzed by numerical methods.The results show that the sailfish model has the best swimming performance,and the drag force during travelling is smaller than that of the tuna and dolphin models,and the propulsion efficiency of the sailfish model is higher by comparison of Strouhal number.On the other hand,the crescent-fin bionic fish has the highest swimming speed,which is about 2.2 times of the octagonal-fin bionic fish.Therefore,sailfish crescent-finned robotic fish has better swimming performance.The calculation results provide a good reference value for reducing the fluid resistance of the machine fish and improving its propulsion efficiency.

关 键 词：仿生机器鱼 静水阻力 外形 推进效率 数值分析 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]