【作者】 袁野； 吴哲； 毕小波； 张志国； 冯大奎；

【Author】 YUAN Ye;WU Zhe;BI Xiao-bo;ZHANG Zhi-guo;FENG Da-kui;Shool of Naval Architecture and Ocean Engineering,Huazhong University ofScience and Technology;

【机构】 华中科技大学船舶与海洋工程学院；

【摘要】 长期以来,海豚一直被认为是有极高推进效率和极小阻力的高速游泳健将,在其自主游动的过程中海豚摆尾运动给海豚的游动提供了足够大的推力。科学家经过长期的研究发现,鱼类的摆尾运动与斯图诺哈尔数(St)有着密切的关系,并且在一个小范围的斯图诺哈尔数内可以进行高效游动,同时St还对其身后尾涡的形成有重要的影响。本文由海豚的摆尾游动作为分析基础,运用FLUENT求解器和UDF动网格技术,重点分析了海豚摆尾运动过程中运动和水动力性能特点。在此基础上,详细分析了海豚摆尾产生的尾涡以及推力,并讨论了斯图诺哈尔数对海豚尾涡的影响,以及推力的生成,涡的形成与St之间的关系。更多还原

【Abstract】 For a long time,dolphin has always been considered as a swimmer with extremely high thrust efficiency and minimum resistance,the kick kinematics during the process of its own swimming can provides itself enough thrust.After a long period of research scientists found that kick kinematics of fish has a close relationship with Strouhal number(St),and it can effectively swim in a small range of St.Also,St has an important effect on the formation of tail vortex of fish.In this paper,on the basis of dolphin kick analyzed the movement and hydrodynamic characteristics in the progress of dolphin kick,using the FLUENT software solver and UDF dynamic grid technique.What’s more,we analyzes the tailing vortex and thrust of dolphin,and discussed the influence of St on the tailing votex.In the mean time,we find the relationship among the generationg of thrust,formation of vortex and St.更多还原