一种新型的仿生双尾推进器模型实验

针对单尾鳍摆动存在的机器鱼的摇艏问题,设计出双尾鳍仿鱼推进器,并将其应用于小水线面双体船,制作了仿生双尾推进的实验平台,在水池中进行了双尾推进试验研究.结果表明:双尾推进作为一种新型的仿生推进器,不仅解决了单尾机器鱼游动时鱼体的晃动问题,而且还具有优良的推进和操纵性能.笔者还采用计算流体力学软件FLUENT计算摆动尾鳍非定常流动的流场特性,结合单尾鳍和双尾鳍的不同流场特性分析了双尾鳍在摆动过程中的相互干扰问题,通过尾鳍流场的数值模拟,表明仿生双尾推进器的两个尾鳍在低频摆动时其相互干扰是有利干扰.

The model experiment of a new-type double tail-fin robotic fish propulsion

To avoid the swing of forebody of robotic fish with single tail-fin,a kind of robotic fish with double tail-fin was designed and was used in SWATH.The experimental platform of double tail-fin proprulsion was produced and the experimental research of the double tail-fin propulsion was made in a pond.As a result,the double tail-fin propulsor as a new-type propulsor not only can solve the shakable problem of the single tail-fin robotic fish when it's swimming,but also has excellent propulsive efficiency and maneuverability.The CFD software FLUENT was used to calculate the unsteady flow characteristic of the swinging tailfin.According to the different flow characteristic between the single tail-fin and the double tail-fin,the author analyzed the mutual interferential problem during the swing process of the double tail-fin.The numerical simulation of the tail-fin field shows that it is beneficial that the two tail-fins of double tailfin robotic fish propulsion interfere with each other while swinging in the low frequency.