以台风烟花过境沿海陆上风电场期间,风电场内特别是风电机组位置的风速、风向和湍流强度的微尺度分布及其随时间的变化为研究对象,基于中尺度WRF模式的模拟结果建立CFD计算域的边界条件,建立台风大气边界层风速、风向廓线参数化模型,以及考虑中尺度热带气旋和台风边界层内卷效应的风场CFD计算模型。算例结果表明,所建立的台风大气边界层风场CFD计算模型可反映台风大气涡旋在风电场微尺度范围的流动特性,风电机组轮毂点的计算风速和实测的机舱风速符合较好,表明所研究的方法可进一步应用于台风影响地区风电场内风电机组台风风险的精细化评估,开展考虑台风风险的微观选址优化等。
Abstract
The objective of this research is to study the micro-scale distribution of wind speed, wind direction and turbulence intensity within a wind farm, especially at locations of the wind turbines, and its variation of those elements while the typhoon In-Fa passes through a coastal onshore wind farm. A micro-scale computational fluid dynamic（CFD） typhoon simulation tool is constructed; its boundary conditions established based on the data output of a mesoscale Weather Research & Forescasting（WRF） typhoon model. The coupling method involved applied a parameterized model of wind speed and wind direction profile for typhoon atmospheric boundary layer. A CFD solver considering cyclone’s rotating effect is established, the CFD model deal with wind direction variation along height due to inward air sucking effect near ground level. The case study results show that the typhoon CFD model is suitable for typhoon atmospheric boundary layer flow simulation, which produces the wind flow characteristics of landfall tropical cyclones passing wind farms. The method studied can be further applied to the refined assessment of typhoon risk of wind turbines in wind farms in typhoon-affected areas. The method can also be utilized to carry out micro-siting optimization considering typhoon risk.
关键词
热带气旋 /
陆上风电场 /
CFD /
大气边界层 /
中微尺度耦合
Key words
tropical cyclone /
onshore wind farm /
CFD /
atmospheric boundary layer /
meso-microscale coupling
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基金
国家重点研发计划（2018YFB1501102）
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