摘要
Within the context of global energy transitions,many wind turbines have been installed in desert and Gobi regions.Nevertheless,the impact of turbulence characteristics in actual sand-laden atmospheric flows on the aerodynamic performance of wind turbines has not been evaluated.The current study employs the high-quality wind velocity data measured in the Qingtu Lake Observation Array station of Min Qin to reveal the effects of turbulence characteristics in sand-laden atmospheric flows on the power and loads of a small wind turbine.The results demonstrate that turbulent coherent structures under sand-laden conditions occur more frequently and with shorter durations than that under the unladen conditions,leading to frequent and large fluctuations of wind turbine loads,specifically,the power,thrust,and blade root flapwise moment increased by 238%,167%,and 194%,respectively.The predictions by applying the extreme turbulence model suggested that the maximum extreme thrust,blade root flapwise moment,and blade root edgewise moment of wind turbine under sand-laden conditions are 23%,19%,and 7%higher than that under unladen conditions.This study is expected to provide a basic supply for wind turbine design and siting decisions in sand-laden environment.
在全球能源转型的背景下,越来越多的风力机安装在沙漠和戈壁地区.然而,实际沙尘气流的湍流特性对风力机气动性能的影响尚未得到评估.本研究利用在民勤青土湖观测阵列站测量到的高质量风速数据,揭示了含沙大气流中的湍流特性对小型风力机功率和载荷的影响.结果表明,与净风条件相比,沙尘条件下的湍流相干结构发生的频率更高、持续时间更短,导致风电机组的载荷波动频繁且波幅增大.具体而言,风力机功率、推力和叶根挥舞力矩分别增加了238%、167%和194%.应用极端湍流模型进行的预测表明,风力发电机在沙尘条件下最大的极端推力、极端叶根挥舞力矩和极端叶根摆振力矩分别比净风条件下高出23%、19%和7%.这项研究有望为含沙环境下风力机的设计和选址决策提供帮助.
基金
supported by the National Natural Science Foundation of China(Grant Nos.52276197 and 52166014)
Gansu Province Key Research and Development Program-Industrial Project(Grant No.23YFGA0069)
the National Key Research and Development Plan(Grant No.20t22YFB4202102-04).
