摘要
针对风剪切对尾流的影响研究不充分的问题,文章在某风电场进行了风场实验,分析了不同风速下的风剪切现象以及在不同来流条件下的尾流变化特征,并使用了三维尾流模型对垂直尾流剖面进行了验证。结果表明:风速大小对风剪切的影响较为明显,风剪切效应随着风速的增加而加强,风速每增加1 m/s,风剪切指数增加0.05;风剪切效应对尾流的分布有较大影响,风剪切效应越强,尾流的速度沿着高度方向上的梯度越大,尾流的宽度和长度也越大;在轮毂中心线附近的模型预测曲线和尾流实测数据拟合较好,相对误差基本在10%以内,受地形的影响,近地侧预测的相对误差较大。
In view of the insufficient research on the influence of wind shear on wake at present,two lidars were used to carry out wind field experiments in a wind farm,analyzed the phenomenon of wind shear under different wind speeds and the characteristics of wake change under different incoming flow conditions,and used a three-dimensional wake model to verify the vertical wake profiles.The results show that the wind speed has an obvious effect on wind shear,and the wind shear effect increases with the increase of wind speed,and the wind shear index increases about0.05 for every 1 m/s increase of the wind speed.The wind shear effect has a great influence on the distribution characteristics of the wake.The stronger the wind shear effect is,the greater the gradient of the wake velocity along the height direction,and the greater the width and length of the wake.The predicted curve of the model near the hub center line of the wind turbine and the measured wake data fit well,and the relative errors are basically within 10%,while the relative errors of the prediction near the ground side are large due to the influence of the terrain.
作者
李泽鹏
张福国
周川
吴鹏
李晓恩
Li Zepeng;Zhang Fuguo;Zhou Chuan;Wu Peng;Li Xiaoen(State Power Investment Corporation Research Institute Co.,Ltd.,Beijing 102209,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2024年第3期355-360,共6页
Renewable Energy Resources
基金
智慧园区架构模型研究及能量管理平台研发项目(C-SZH-202103)。
关键词
风场实验
风剪切
尾流
激光雷达
wind field experiment
wind shear
wake
Laser Radar
