柔性仿金枪鱼月牙形尾鳍水动力分析  

Hydrodynamic analysis of flexible lunate tail of tuna

作　　者：成巍[1] 苏玉民[1] 秦再白[1] 徐玉如 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《海洋工程》2004年第4期73-79,共7页The Ocean Engineering

基　　金：国防基础研究重点资助项目(J1900C003)

摘　　要：为研究鱼类高速游动机理,以金枪鱼月牙形尾鳍为对象,采用面元法计算分析了其非定常水动力性能。假设尾鳍在横移和摇摆的同时,以某一匀速向前运动,并假设其在弦向和展向以某一给定规律发生变形,以模仿柔性变形。探讨了前进速度、横移和摇摆的幅度、频率及其相位差对柔性尾鳍推进性能的影响,并与做相应运动的刚性尾鳍进行了对比。　 In this paper, the unsteady hydrodynamic characteristics of a flexible lunate tuna-tail are analyzed numerically by the low-order potential based surface panel method to discover the secret of the tuna's high cruising speed. The tuna-tail is considered as a three-dimensional lunate fin swaying and yawing in the uniform flow, with given deflexion in chordwise and spanwise directions to imitate its flexibility. The thrust coefficient, lateral force coefficient and propulsion efficiency can be obtained. The effects of the oscillating amplitude and the phase difference between swaying and yawing are investigated. The numerical results for flexible and rigid fins are compared and analyzed, which indicate that the present numerical method is effective for researching the hydrodynamic characteristics of oscillating tuna-tail.

关 键 词：柔性尾鳍 月牙形尾鳍 面元法 推进性能 非定常流 

分 类 号：P754[天文地球—海洋科学]