风力机风场模型的研究及紊流风场的MATLAB数值模拟

讨论了风剪、塔影和尾流对风场平均速度的影响,介绍了随机理论中离散随机序列与其功率谱、傅立叶谱的关系,研究了紊流风场模型中常用的几种典型的速度功率谱密度模型如Harris速度谱、Kaimal速度谱、Von Karman速度谱等模型。根据随机理论,确定利用速度谱求风速的紊流部分的算法,并用MATLAB编程实现了风力机紊流风场的数值模拟。

WIND TURBINE WIND FIELD MODELS STUDY AND NUMERICAL SIMULATION OF TURBULENCE WIND FIELD WITH MATLAB

The relations among the discrete random series,the power spectrum and the fourier spectrum in the random theory were discussed,and several representative and commonly used velocity power density spectrums such as Harris spectrum,Karmal spectrum,Von Karman spectnan,etc.were introduced based on the random theory,an arithmetic pro- grammed using MATLAB has been developed to calculate the turbulence wind velocities.In addition,this paper introduces three factors which influence the steady wind velocity briefly,namely wind shear,tower shadow,upwind turbine wake,so as to modify the wind field model.