タンデムに配置された洋上風車まわりの流れのLES解析

抄録

The wake of an upstream wind turbine decreases the output power of, and increases the fatigue load on the downstream wind turbines. It is therefore important to accurately evaluate the influence of the wake of the upstream turbines on the downstream turbines for considering an arrangement of wind turbines in a wind farm. The ultimate goals of this research are to identify the essential features of the near and far wakes of a wind turbine, which originates from the boundary layers on the blade surfaces and is subjected to the approaching atmospheric boundary layers, and to understand the interferential effects of two off-shore wind turbines in tandem arrangement in a much more detailed manner than it has been done in previous research. To this end, large scale LES analysis is carried out for an NREL 5MW wind turbine by using K computer. Then, by comparing LES results with reference data, the accuracy of the prediction of the wake and the power performance has been evaluated.