摘要
针对多风力机尾流干涉下的流场分布复杂问题,采用两台不同类型的地基式激光雷达在风电场设计进行了测风试验。以两台风力机的尾流场分布特性为例,结合测风数据将复杂的尾流干涉流场分类为无尾流、偏尾流以及全尾流共3种典型干涉工况,并对3种工况下的尾流场分布特性进行了量化分析。结果表明:无尾流干涉工况下,尾流相互独立、尾流恢复速率基本一致且尾流区风速分布均近似呈现对称高斯分布。偏尾流和全尾流干涉工况下,下游风力机尾流中心恢复速率出现下降,其中全尾流干涉工况下尾流恢复速率下降最为明显。在部分尾流干涉工况下,尾流区横截面风速分布呈现非对称分布。处于全尾流工况时,尾流分布呈现高斯分布,但尾流边界处风速出现一定程度降低。
For the complicated flow field distribution problem under the interference of multi-wind turbine wakes, two different types of ground-based lidars were used to conduct wind measurement experiments in a wind farm design. Taking the wake field distribution characteristics of two wind turbines as an example, combined with wind measurement data, the complex wake interference flow field is classified into three typical interference conditions, which were no wake, partial wake and full wake. And the wake field distribution characteristics under the above three working conditions are quantitatively analyzed. The results show that under the condition of non-wake interference, the wakes are independent of each other, the wake recovery rate is basically the same, and the wind speed distribution in the wake area is approximately a symmetric Gaussian distribution. Under partial wake and full wake interference conditions, the recovery rate of the wake center of the downstream wind turbine decreases, and the wake recovery rate drops most obviously under the full wake interference conditions. Under partial wake interference conditions, the cross-sectional wind speed distribution of the wake region presents an asymmetrical distribution. In the full wake condition, the wake distribution presents a Gaussian distribution, but the wind speed at the wake boundary decreases to a certain extent.
作者
王大伟
李文田
李兵兵
崔博
魏庆海
冯国辉
杨旭
王辉
WANG Da-wei;LI Wen-tian;LI Bing-bing;CUI Bo;WEI Qing-hai;FENG Guo-hui;YANG Xu;WANG Hui
出处
《节能》
2022年第11期45-49,共5页
Energy Conservation
关键词
尾流干涉
激光雷达
尾流风速分布
尾流恢复速率
wake interference
lidars
wake speed distribution
wake speed recovery rate
