A blind test on wind turbine wake modelling based on wind tunnel experiments: Phase II – Active Wake Control

Phase II of the Blind Test campaign introduces active individual blade pitch control to the upstream turbine, challenging participants to simulate advanced wake dynamics. This data set ("Data files.zip") contains the wind tunnel measurement data based on wind tunnel experiments organised under the TWEET-IE project (www.tweet-ie.eu). The experiments were carried-out in the large section 2.5 ×3.5×12 m^3 (H× W × L) of the closed-circuit wind tunnel at NTUA. The set up consistsof two identically scaled wind turbine models (G1 models) which are placed in line with a longitudinal distance of 5D. In the context of Phase II, the upstream turbine was initially tested in its baseline configuration before being subjected to dynamic helix motion, with amplitude ranges of 3° and helix frequency of 𝑓ℎ𝑒𝑙𝑖𝑥 = fβ/fr ∈ [0.7,1.3]. The inflow conditions include both Low and High Turbulence Intensities, while Particle Tracking Velocimetry (PTV) measurements were also conducted within the context of Phase II, in a specified dimensionless helix frequency of 𝑓ℎ𝑒𝑙𝑖𝑥 = 0.82. The turbine models, designed and manufactured by TUM, were instrumented with multiple sensors and actuators and had a diameter of 1.1m. Measurements include velocity, power and loads on the turbines. A detailed description of the experimental set up can be found in the accompanying document ("Data documentation.docx"). File "Submission procedure.zip" includes the format description and the templates of the output data that should be submitted by the participants in the blind test comparison.盲测活动第二阶段为上游风力机引入主动式单叶片桨距控制技术，要求参赛选手模拟先进尾流动力学行为。本数据集("Data files.zip")包含由TWEET-IE项目(www.tweet-ie.eu)组织开展的风洞实验实测数据。 实验在雅典国立科技大学(National Technical University of Athens, NTUA)的封闭回流风洞大尺寸试验段内开展，该试验段尺寸为2.5m(高)×3.5m(宽)×12m(长)。试验装置包含两台完全相同的缩比风力机模型(G1型模型)，二者沿轴向布置，间距为5倍风轮直径(5D)。在本第二阶段试验中，上游风力机首先以基准构型开展测试，随后施加动态螺距运动，运动幅值范围为3°，无量纲螺距运动频率满足𝑓_ℎ𝑒𝑙𝑖𝑥 = 𝑓_β/𝑓_𝑟 ∈ [0.7, 1.3]。来流条件涵盖低湍流强度与高湍流强度两种工况；此外第二阶段试验还开展了粒子跟踪测速(Particle Tracking Velocimetry, PTV)测量，对应的无量纲螺距运动频率固定为𝑓_ℎ𝑒𝑙𝑖𝑥 = 0.82。 该风力机模型由慕尼黑工业大学(Technical University of Munich, TUM)设计制造，搭载多组传感器与执行机构，风轮直径为1.1m。实测数据涵盖风力机的流速、功率与载荷信息。试验装置的详细说明可参阅随附文档("Data documentation.docx")。 "Submission procedure.zip"文件包含本次盲测对比活动要求参赛选手提交的输出数据格式说明与模板。