下击暴流作用下停机状态风力机表面风压特性研究  

STUDY ON SURFACE WIND PRESSURE CHARACTERISTICS OF WIND TURBINE AT SHUTDOWN CONDITION UNDER DOWNBURST

作　　者：王辉[1] 李将将 吴学健 Wang Hui;Li Jiangjiang;Wu Xuejian(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《太阳能学报》2025年第4期454-462,共9页Acta Energiae Solaris Sinica

基　　金：亚热带建筑科学国家重点实验室开放课题(2020ZB24)。

摘　　要：采用雷诺时均方法对静止和移动下击暴流风场特性开展研究,分析射流中心移速V_(t)对下击暴流风场结构的影响,并以NREL 5 MW型风力机为研究对象,研究揭示下击暴流场中风力机周边流场和表面风压特性。结果表明:移速V_(t)的增大致使风力机周边风速减小而极值增大,涡旋旋向由绕X轴转为锥形斜向下。塔筒压力面、吸力面和叶片压力面风压分别沿圆周或弦长方向呈“山字形”、“倒U形”和“斜倒U形”变化,而叶片吸力面风压基本相同;实际距离l的增大导致风力机压力面风压极值略微增大,两侧和吸力面由正转负,而后均转为0.16的均匀正压。移速V_(t)的增大将压缩风暴前缘影响区,导致l值相近V_(t)不同时风压系数均值差异明显。The Reynolds time-averaged method is used to study the characteristics of static and moving downburst wind field,and the influence of jet center movement speed V_(t) on the structure of downburst wind field is analyzed.Taking NREL 5 MW wind turbine as research object,the characteristics of flow field and surface wind pressure around wind turbine in downburst field are studied and revealed.The results show that the increase of the movement speed V_(t) causes wind speed around wind turbine to decrease and the extreme value to increase,and the vortex rotation direction changes from around X axis to conical oblique downward.The wind pressure on pressure surface and suction surface of the tower along circumference varies as the shape of"mountain"and"inverted U"respectively.The wind pressure on suction surface of the blades varies along chord length as the shape of"oblique inverted U",while the wind pressure on suction surface of the blades is basically same.The increase of the actual distance l leads to a slight increase in the extreme value of the wind pressure on pressure surface of wind turbine,and the two sides and suction surface change from positive pressure to negative pressure,and then which all turn to a uniform positive pressure with wind coefficient of 0.16.The increase of the movement speed V_(t) will compress the influence area of the front edge of the storm,resulting in a significant difference in the mean wind coefficient with similar actual distance l and different movement speed V_(t).

关 键 词：下击暴流风 移动暴流 风力机 SST k-ω模型 径向距离 表面风压 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]