尾鳍形状对摆动尾鳍推进性能的影响  

The Effects of Caudal Fin Shape on the Propulsion Performance of Flapping Caudal Fin

作　　者：张曦[1] 苏玉民[1] 王兆立[1] 

机构地区：[1]哈尔滨工程大学水下智能机器人国防重点实验室,哈尔滨150001

出　　处：《上海交通大学学报》2012年第2期296-300,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50879014);高等学校博士学科点专项科研基金资助项目(200802170010)

摘　　要：研究了尾鳍形状对摆动尾鳍推进性能的影响.设计了一套摆尾仿生推进装置,实验分析了仿金枪鱼、仿海豚、仿白鲸3种尾鳍的推进性能.同时采用数值方法对尾鳍的水动力性能进行了计算.实验和数值结果表明,仿金枪鱼尾鳍的平均推力系数和输入功率系数最小,推进效率最高.对尾涡的分析表明,仿金枪鱼尾鳍尾涡强度最弱,分布范围最小.A comprehensive study was presented on the effects of the caudal fin shape on the propulsion performance of a harmonically heaving and pitching caudal fin.A bio-caudal fin propulsion mechanics was designed and a series of hydrodynamic experiments for three caudal fin shapes（the whale caudal fin,the dolphin caudal fin,and the tuna caudal fin） were performed.Then numerical simulations were done.Both the experimental and computational results indicate that the tuna caudal fin produces the highest efficiency,although the mean thrust coefficient and input power coefficient of the tuna caudal fin was the smallest.The characteristics of wake were analyzed to find that not only the wake scale of the tuna caudal fin is the smallest,but also the vorticity magnitude of the tuna caudal fin is the weakest.

关 键 词：摆动尾鳍 尾鳍形状 推进性能 尾涡 

分 类 号：O357[理学—流体力学]