垂直轴潮流水轮机数值模拟研究

NUMERICAL SIMULATION OF VERTICAL AXIS TIDAL TURBINE

采用单向耦合欧拉-拉格朗日方法对垂直轴潮流水轮机(Vertical Axis Tidal Turbine)水动力性能和尾迹进行数值模拟研究,其中连续相采用雷诺平均Navier-Stocks方程(RANS)结合SST湍流模型求解,分散相颗粒的运动轨迹通过牛顿第二定律确定,叶片的尾迹通过颗粒的轨迹示踪。以文献[10]中在水槽中进行的垂直轴风力机试验为计算模型。将模拟结果与试验结果进行对比,叶片受力和叶片尾迹均与试验结果符合很好;对比前人的结果得到的叶片在不同位置角的瞬时受力规律也更加接近试验测得规律。

The numerical simulation research of the hydrodynamic performance and wake of VATT（vertical axis tidal turbine） was conducted using unidirectional coupling Euler-Lagrange method. The continuous phase was solved through Reynolds-averaged Navier-Stoeks （RANS） equation combined with SST turbulence model and the particle trajectories of the dispersed phase were determined according to Newton second law. Particle trajectories can represent the wakes of blades. Take the vertical axis wind turbine experiment by Strichland et al. which carried out in the trough as the computation model. Comparing the simulation results with experiment＇ s and predecessors＇ , the force and wakes of blades are good in agreement with those obtained by experiment, and the instantaneous stress rules at azimuthal angle are also closer to experiment＇ s than predecessors＇.