不同工况下潮流能水平轴水轮机大涡模拟研究

A Large-eddy simulation study of horizontal axis tidal turbine in different conditions

该文结合大涡模拟以及致动线法对潮流能水平轴水轮机进行数值模拟研究,并通过拖曳水池实验获得了水轮机的一些性能参数。首先,将数值模型与试验数据进行对比验证,这在均匀流下吻合得很好。然后,研究了不同来流对水轮机尾迹的影响。结果表明,不同的入流条件下尾流混合速度也不同。在湍流入流条件下,尾迹是不对称的,并且在水轮机下游区域迅速混合。此外,该文还研究了湍流强度以及入射角对水轮机性能和尾流场的影响。

The numerical simulation of horizontal axis tidal turbine has been carried out, combining the large eddy simulation and actuator line method. The towing tank test is conducted to acquire the performance of an originally designed tidal turbine. The numerical simulation results and the experimental data have been compared to verify its accuracy. In addition, the effects of different inflow conditions on turbine performance and wake have been studied. The results show that the structure and mixing rates of turbine wake are different for various inflow conditions. For turbulent incident flow, the wake is asymmetric and mixed fast. Furthermore, the preliminary results of different turbulent intensity and the effect of incident angle on turbine performance are presented.