The investigation of the dynamical mechanism of the wind risk to the windmill by using the RIAM-COMAPCT CFD model

在日本，由于陡峭复杂的地形，风速的空间分布非常复杂，因此选择一个好的地点放置风力涡轮机是非常重要的。我们一直在开发名为RIAM-COMPACT(R)的非定常数值模型（九州大学应用力学研究所，复杂地形上气流的计算预测）。RIAM-COMPACT(R)是基于LES（大涡模拟）。本文提出了基于RIAM-COMPACT(R) CFD模型的连续风向变化再现方法。此外，我们还对最佳叶尖速比下的风透镜涡轮（WLT）尾部尾迹进行了大涡模拟（LES）。

It is highly important in Japan to choose a good site for wind turbines, because the spatial distribution of wind speed is quite complicated over steep complex terrain. We have been developing the unsteady numerical model called the RIAM-COMPACT(Ｒ) (Research Institute for Applied Mechanics, Kyushu University, COMputational Prediction of Airflow over Complex Terrain). The RIAM-COMPACT(Ｒ) is based on the LES (Large-Eddy Simulation). In thepresent paper, the reproduction method of the continuous wind direction changes based on the RIAM-COMPACT(Ｒ) CFD model that was proposed. In addition, we carried out the large-eddy simulation (LES) of the wake generated behind the wind lens turbine (WLT) under optimal tip speed ratio.