大型山地风电场建设对局地气候影响的数值研究

Numerical Research on Impact of Large-scale Wind Farms in Mountainous Area on Regional Climate

本文利用地图下载器获取风电场地形数据,导入UG软件拟合建立复杂地形几何模型;以Schmitz理论为基础,计算出风力机叶片参数;以三维坐标变换原理为基础,利用UG实现了叶片的三维建模,建立风力机模型。采用基于Reynolds的时均N-S方程和标准k-ε湍流模型的数值研究方法,对布置2MW风力机组的山地风电场进行数值计算和分析研究,获得风电场安装不同周期时风速、风压及温度等气候参数。研究结果表明,随着风电场建设的进行,其下游风速及风压减小;温度虽然没有明显变化,但温度分布发生改变。

In this paper, the topographic data of wind farms are is obtained by maps downloader and the complex geometry model is built by software UG. The parameters of the wind turbine blades are computed which is based on Schmitz theory and the three-dimensional model of the blade is built by UG. Then, the model of the wind turbine is built. The numerical simulation based on the Reynolds-averaged N-S equations and standard k-ε turbulent model has been performed on wind field on which the wind velocity, wind pressure and temperature have been gained in different developing period. The simulation results show that the wind velocity and wind pressure will be decreased with the construction of the wind farm, and the change of temperature in wind farm is not obvious though its distribution will be changed.