首先在秒级风速数据的基础上构建动态风速函数模拟真实风速工况,同时基于高程数据构建某真实复杂地形的三维结构图。基于格子玻尔兹曼方法并结合自适应格子排布,对复杂地形风电场非定常流场进行数值计算,得到该风电场的风资源分布。之后在典型位置布置2台2 MW风力发电机,考虑真实风力机叶片的动态旋转计算风力机及真实复杂地形在动态风工况下的流场。研究实际复杂地形和动态风速下风电场的风速分布及尾流结构演变规律。结果表明：该方法可实现对复杂地形在动态来流风速作用下的风资源分布预测,并考虑风力机小尺度尾流结构实现对真实风电场流场的多尺度仿真。
Abstract
A fitting function for the unsteady wind velocity based on the data measured several seconds apart is firstly developed, and the 3D structure of a real complex terrain in a wind farm is established according to the digital elevation model. Then, using the Lattice-Boltzmann method （LBM） incorporated with the adaptive mesh refinement method, the unsteady flow field induced by the complex terrain is simulated and the distribution of wind energy resources is obtained. After that, the 2 MW wind turbines are sit in the wind farm and the full scale flow field induced by the terrain and wind turbines is simulated considering the rotating of blades. The wake structure of wind turbines in the complex terrain and under the unsteady inflow is investigated. The results show that the present modeling framework can be used to predict the wind resource distribution on the complex terrain considering the inflow velocity fluctuation, and achieve the multiscale simulation in a wind farm with considering the wake structure of wind turbines.
关键词
风力发电机 /
风电场 /
数值模拟 /
格子玻尔兹曼方法 /
复杂地形
Key words
wind turbines /
wind farms /
computer simulation /
Lattice-Boltzmann method /
complex terrain
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基金
国家自然科学基金（52006197）; 浙江省自然科学基金（LQ21E060012）
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