摆幅对仿金枪鱼尾鳍推进性能的影响  

On the Effect of Swing Amplitude on the Propulsion Performance of Tuna-like Caudal Fin

作　　者：艾贤祖 宋显成 赵国平[1] AI Xian-zu;SONG Xian-cheng;ZHAO Guo-ping(Beijing Institute of Precision Mechatronics and Controls,Beijing 100076,China)

机构地区：[1]北京精密机电控制设备研究所,北京100076

出　　处：《科学技术与工程》2020年第20期7996-8001,共6页Science Technology and Engineering

摘　　要：针对仿金枪鱼尾鳍,开展摇摆幅度对其推进性能影响的研究。首先,基于浸入边界法实现对尾鳍数值模拟,通过试验比对验证数值方法的有效性。然后,建立仿金枪鱼尾鳍的三维模型,数值模拟其不同摇摆幅度下推进性能的变化。最后,对仿真结果进行对比分析。结果表明,在大摇摆幅度下,随着摇摆幅度增大,尾鳍受到平均推力系数缓慢增大,推进效率快速下降。研究可为仿金枪鱼尾鳍类机器的设计和控制提供参考和指导。The influence of the swing amplitude on tuna-like caudal fin’s propulsion performance was carried out. First, numerical simulation of caudal fins was conducted based on the immersion boundary method. The validity of the numerical method was verified in comparison with the experimental results. Secondly, a three-dimensional model of the tuna-like caudal fin was established, and the change of propulsion performance under different swing amplitudes was numerically simulated. Finally, the simulation results were compared and analyzed. The results show that under large swing amplitudes, as the swing amplitude increase, the average thrust coefficient of the caudal fin increase slowly, and the propulsion efficiency decrease rapidly. The research may provide a reference and guidance for the design and control of the machines that equip with tuna-like caudal fin.

关 键 词：摇摆幅度 浸入边界法 摆动尾鳍 推进性能 

分 类 号：O368[理学—流体力学] Q692[理学—力学]