双水翼耦合振荡捕获潮流能系统2维数值模拟

发布时间：2018-04-22 04:20

本文选题：双水翼 + 折算频率　；参考：《四川大学学报(工程科学版)》2016年05期

【摘要】：提出了一种双水翼耦合振荡捕获潮流能的系统,该系统在河床及浅海具有良好的适应性。建立了相应系统的数学模型及网格模型,将域动网格策略用在滑移交界面内部流体域,利用Fluent求解绕2维双振荡翼流动的数值模型。研究了折算频率、俯仰振幅及雷诺数对NACA0015型双水翼水动力特性及捕获潮流能性能的影响,以及在不同运动参数下水翼的升阻力、俯仰力矩、功率系数的变化规律。结果表明,振荡水翼的折算频率、俯仰振幅和雷诺数会影响水翼边界层的分离及周围漩涡的产生和脱落,继而影响振荡翼的升阻力特性和俯仰力矩特性。折算频率与俯仰振幅对振荡水翼系统的捕能效果有较大影响。当水翼的振荡频率为0.28、俯仰振幅为75°、雷诺数为5×10~5时双水翼耦合振荡捕获潮流能系统的水动力和捕能性能较好,捕能效率可达40%。
[Abstract]:In this paper, a coupled oscillatory system of two hydrofoil to capture tidal current energy is proposed. The system has good adaptability in river bed and shallow water. The mathematical model and mesh model of the corresponding system are established. The domain moving mesh strategy is applied to the fluid domain of the slip interface and the numerical model of the two-dimensional oscillating wing flow around the sliding interface is solved by using Fluent. The effects of conversion frequency, pitching amplitude and Reynolds number on the hydrodynamic characteristics and trapping tidal current energy performance of NACA0015 double hydrofoil are studied. The variation rules of lift resistance, pitching moment and power coefficient of the launching wing with different motion parameters are also studied. The results show that the conversion frequency, pitching amplitude and Reynolds number of oscillatory hydrofoil will influence the separation of boundary layer and the generation and shedding of swirl around the hydrofoil, and then affect the characteristics of lift resistance and pitching moment of oscillating hydrofoil. The conversion frequency and pitching amplitude have great influence on the energy capture efficiency of oscillatory hydrofoil system. When the oscillation frequency of hydrofoil is 0.28, the pitching amplitude is 75 掳, and the Reynolds number is 5 脳 10 ~ 5, the hydrodynamic and energy capture performance of the system is better, and the energy capture efficiency can reach 40%.
【作者单位】：山东大学机械工程学院高效洁净机械制造教育部重点实验室;
【基金】：国家自然科学基金资助项目(51475270) 山东省科技发展计划资助项目(2014GGX104014)
【分类号】：P743.3

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