三体组合振荡水翼流体动力特性研究
Hydrodynamic Characteristics of Three-Body Combined Oscillating Hydrofoil

振荡水翼在波浪能、潮流能利用和仿生推进等领域应用广泛，本文对多个水翼振荡摆动过程中的水动力性能进行仿真计算分析。首先建立了三个水翼组合成的三体模型作为分析对象，随后采用时均雷诺模型结合多面体网格技术实现了三体水翼振荡过程的数值模拟方法。在此基础上，对水翼在±20？的摆动角度范围和1~10 m/s来流流速范围内的水动力特性进行了仿真分析。结果表明，在不同摆动角度工况下，高流速区域主要分布在尾部的两个翼型附近区域。随着摆动角度的增大，最大压力变化较小，最低压力逐渐增大。随着来流速度的增大，最大压力和最小压力均均有不同程度的增大。通过对不同工况的升力和阻力曲线分析，随着摆动角度的增大，尾部两个翼型的升力变化较小，升力方向相反，首部翼型随着摆动角度的增大，其升力逐渐增大；随着来流速度的增大，所有翼型的升力和阻力增大，且升力增加逐渐加快。
Oscillating hydrofoils are widely used in the fields of wave energy, tidal energy utilization, and bi-onic propulsion. This paper analyzes the hydrodynamic performance of multiple hydrofoils during oscillation and swing. First, a three-body model composed of three hydrofoils was established as the analysis object, and then the time-averaged Reynolds model combined with polyhedral grid tech-nology was used to realize the numerical simulation method of the three-body hydrofoil oscillation process. On this basis, the hydrodynamic characteristics of the hydrofoil in the swing angle range of ±20？ and the flow velocity range of 1~10 m/s are simulated and analyzed. The results show that under different swing angles, the high velocity area is mainly distributed in the vicinity of the two airfoils at the tail. As the swing angle increases, the maximum pressure changes less and the mini-mum pressure gradually increases. As the incoming flow rate increases, the maximum pressure and minimum pressure both increase. Through the analysis of the lift and drag force curves of different working conditions, with the increase of the swing angle, the lift force of the two tail hydrofoils changes little, and the lift direction is opposite. As the swing angle increases, the lift force gradually increases. As the incoming flow velocity increases, the lift and drag of all hydrofoils increase, and the increase in lift gradually accelerates.