被动式摆动水翼潮流能量获取技术实验研究

Experimental studies of passive oscillating hydrofoil for tidal current energy extracting

针对传统的旋转叶片式水轮机在潮流能量获取过程中存在的问题,提出一种模仿水中生物尾部摆动的被动式摆动水翼潮流能量获取技术。在分析水翼的运动规律和功率系数、效率、折算频率等各参数之间关系的基础上,设计了被动式摆动水翼潮流能量获取实验装置;在三套正反向曲柄摇杆机构的作用下,被动式摆动水翼实现了两自由度周期循环,利用飞轮克服曲柄摇杆机构运动中存在的死点问题,利用扭矩传感器实现了输出轴的转速信号和转矩信号提取;循环水槽环境下完成了被动式摆动水翼能量获取实验,实验结果表明利用被动式摆动水翼能够进行潮流能量获取,当折算频率为0.096时,最高能量获取效率达到18%。

Regarding to the issue existing in the acquisition process of tidal energy by conventional rotary vane water turbine,this paper proposes a kind of passive oscillating hydrofoil tidal energy extracting technology that imitates the tail swinging of aquatic organisms. On the basis of analyzing the relationship of the motion rules of hydrofoil and the parameters including power coefficient,efficiency and reduced frequency,this paper designs a test device for the passive oscillating hydrofoil tidal energy extracting. Under the action of three sets of forward and reverse crank and rocker mechanisms,the passive oscillating hydrofoil has realized the cyclic process with two degrees of freedom.The flywheel is used to overcome the dead point in the process of crank and rocker mechanisms movement. The torque sensor is used to extract the rotating speed signal and torque single of output shaft torque. The energy extracting experiment of passive oscillating hydrofoil was carried out in the circulating water channel. Experiment results show that the passive oscillating hydrofoil can be used to extract tidal current energy. When the reduced frequency reaches 0.09,the highest energy extracting efficiency can achieve 0.18.