Wake behind an offshore wind farm observed with dual-Doppler radars
Wake behind an offshore wind farm observed with dual-Doppler radars
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用双多普勒雷达观察海上风电场后面的苏醒
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Alexander Christian Newcombe
中科院分区：
文献类型：
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作者：
N. Nygaard;Alexander Christian Newcombe
我们给出了海上风电场后尾迹的双多普勒测量结果。测量的尾迹风速与两个尾迹模型进行了比较，一个模型解析单个涡轮机的单个尾迹，另一个将风电场描述为粗糙度增加的分布区域。我们分析了一个定常风向与涡轮排大致对齐的情况。雷达测量使我们能够跟踪通过风力发电场和更下游的尾迹的演变。在这里研究的案例中，尾流区在风力发电场下游至少延伸了17公里。如果考虑到海岸坡度，两个模型都与观测结果吻合很好。通过将模拟风速与多个具有相似流入风向的案例的观测值进行比较，验证了这一结论的一般性。
We present dual-Doppler measurements of the wake behind an offshore wind farm. The measured wind speed in the wake is compared with two wake models, one resolving the single wakes from individual turbines, the other describing the wind farm as a distributed area of increased roughness. We analyse a case with steady wind direction approximately aligned with the turbine rows. The radar measurements allow us to track the evolution of the wakes through the wind farm and further downstream. In the case studied here the wake region extends at least 17 km downstream of the wind farm. Both models are in good agreement with observations provided a coastal gradient is accounted for. The generality of this conclusion is tested by comparing modelled wind speeds with observations aggregated over multiple cases with a similar inflow wind direction.