鳍条倾角对仿生鳍推进力大小的影响  

Influence of Ray Angle of a Biomimetic Fin on Its Thrust Generation

作　　者：章永华[1] 

机构地区：[1]台州职业技术学院机电工程学院,浙江台州318000

出　　处：《中北大学学报（自然科学版）》2016年第6期606-613,共8页Journal of North University of China(Natural Science Edition)

基　　金：浙江省自然科学基金资助项目(LY15E060001);台州职业技术学院一般课题(2017YB01)

摘　　要：为研究仿生鳍条倾斜角度对波动鳍推进力产生的影响,建立了鱼鳍运动学和动力学方程.通过实验测量技术,比较分析了仿生鳍在等鳍条长度和等鳍面面积两种情况下,鳍条倾角分别为30°,40°,45°,50°,60°,70°,80°和90°时推进力的变化规律,同时测量了鳍条倾角为45°时不同运动学参数下两种模式的推进力.并从流体动力学角度,初步解释了两种情况下仿生鳍推进力存在差异的原因.结果表明:在等鳍条长度条件下,平均推进力随着鳍条倾角的增大而增加;在等鳍面面积条件下,平均推进力随着鳍条倾角增大而减小.在相同条件下,等鳍面面积仿生鳍产生的平均推进力始终大于等鳍条长度情况.该结果为仿生波动鳍推进器结构优化提供参考.In order to investigate the influence of fin ray angle on thrust generation of a biomimetic undulating fin,kinematic modeling and hydrodynamic modeling were established.Based on experimental technology,the change of thrust with fin ray angles 30°,40°,45°,50°,60°,70°,80°and 90°）under the two conditions（constant fin ray length and constant fin surface area）were illustrated.The thrust at fin ray angle of 45°with different kinematic parameters under the two conditions were also measured.A preliminary explanation on the cause of those differences was conducted according to the theory of computational fluid dynamics（CFD）.The results indicate that：in the case of the constant fin ray length,the averaged propulsion thrust increases with the increase of angle of fin ray;in the case of the constant fin area,the averaged thrust decreases with the increase of angle of fin ray.However,the averaged thrust in the case of the constant fin area is always larger than the case of the constant fin ray length at the same condition.The results provide some useful references for optimal structure design of biomimetic undulating fin based propulsor.

关 键 词：波动鳍 鳍条倾角 推进力 计算流体动力学 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]