2自由度振荡水翼推进性能分析及实验研究

Performance Analysis and Experimental Study on 2-Degree-of-Freedom Oscillating Hydrofoil Propulsion

为了研究仿生水翼推进性能,设计了一种2自由度振荡水翼推进装置.实现了基于升力/阻力模式的2种振荡水翼推进方式.研制了振荡水翼推进性能实验平台,在循环水池环境下完成了不同参数耦合情况下振荡水翼推进性能实验.利用6轴力传感器测量水翼振荡时产生的推力/升力,并将实验结果与数值模拟结果对比,分析不同参数对推进性能的影响.实验结果表明,在升力推进模式下,增加拍旋运动幅值和振荡频率可以提高平均推力;随着位旋运动幅值的增加,平均推力呈现先增大后减小的趋势;随着来流速度的增大,平均推力逐渐减小.在阻力推进模式下,增加拍旋运动幅值和振荡频率均可提高平均推力.

In order to study the bionic hydrofoil propulsion performance, a 2-degree-of-freedom oscillating hydrofoil propulsion device is designed. The lift force propulsion mode and the drag force propulsion mode are realized. An experiment platform of oscillating hydrofoil propulsion performance is built and a series of experiments are performed with different parameters coupling in the circulating water tunnel. In order to analyze the influence of different parameters on the propulsion performance, thrust and lift forces generated by oscillating hydrofoil are measured with a 6-axis force sensor, and compared with numerical simulation results. Experimental results show that the average thrust can be raised by increasing the heaving amplitude and oscillating frequency under the lift force propulsion mode. With the increase of pitching amplitude, the average thrust increases at first and then decreases. With the increase of oncoming flow speed, the average thrust decreases. Under the drag propulsion mode, the average thrust can be raised by increasing the heaving amplitude or oscillating frequency.