JHTDB-wind
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JHTDB-wind数据集由约翰霍普金斯大学生成,通过LES模拟了一个由四排两台涡轮机组成的8台涡轮机风电场。为了避免预先指定表面温度或热通量,使用了局部1D土壤热传导模型,并与LES耦合。在低分辨率LES运行数天后,实现了近似的时间周期性行为,之后在24小时内继续进行高分辨率LES。LES数据分析表明,风力涡轮机尾流对温度场和空间表面热通量模式有显著影响,在特定条件下(干燥无植被土壤、晴朗天空),风电场后面的地表温度在夜间升高。使用创新的Web服务促进了数据访问工具的详细数据分析表明,在早晨过渡期间,低层急流的存在和风电场的阻塞效应共同导致风电场上游的轮毂高度处冷却和风速降低。此外,在风电场的下游存在更大的湍流水平,解释了下游风力涡轮机产生更多电力的原因。
The JHTDB-wind dataset was generated by Johns Hopkins University, which simulates an 8-turbine wind farm (four rows with two turbines per row) using Large Eddy Simulation (LES). To avoid pre-specifying surface temperature or heat flux, a local 1D soil heat conduction model was coupled with the LES framework. After several days of low-resolution LES runs that achieved approximate temporal periodicity, high-resolution LES simulations were conducted for an additional 24 hours. Analysis of the LES dataset demonstrates that wind turbine wakes exert significant impacts on the temperature field and spatial surface heat flux distributions. Under specific conditions (dry, vegetation-free soil and clear skies), the surface temperature downstream of the wind farm increases at night. Detailed data analyses via innovative web service-enabled data access tools reveal that during the morning transition period, the combined effects of a low-level jet and the wind farm's blocking effect result in cooling and reduced wind speed at hub height upstream of the wind farm. Furthermore, higher turbulence levels are observed downstream of the wind farm, which accounts for the increased power generation of downstream wind turbines.




