[VIVyD] Wind Tunnel Tests on a Spring Mounted Cylinder @ ULiège 2020-04

The wind tunnel set-up developed in the present study consists in a smooth circular cylinder suspended vertically and free to oscillate horizontally. This PVC cylinder has an external diameter of D = 10 cm, a thickness e = 3 mm and a length L = 1440 mm. It is supported by extension springs connected to a rigid frame attached to the ceiling and the ground of the test section of the Wind Tunnel Laboratory of University of Liège. The bending stiffness in the horizontal direction is equal to 6155 N/m, elastomers are added and a wind-off analysis showed a natural frequency of f0 = 7.8 Hz and a damping ratio of ξ = 0.1%. The velocity is measured with a Pitot tube, while the cylinder's trransverse horizontal displacement is measured with a laser. The 3D flow velocity in the wake of the model is measured with a cobra probe synchronously with the cylinder displacement measured with the laser. At mid-span, 36 pressure taps are distributed evenly around the circumference of the cylinder. The dataset contains four studies, each of them corresponding to different turbulence conditions in the incoming flow: no turbulence grid, and then 3 different turbulence grids with varying meshes, represented in the "grids.pdf" file that comes along.本研究开发的风洞实验装置包含一根垂直悬挂、可水平自由振动的光滑圆柱。该聚氯乙烯（PVC）圆柱的外径为D = 10 cm，壁厚e = 3 mm，长度L = 1440 mm。圆柱通过拉伸弹簧支撑于刚性框架，该框架固定于列日大学风洞实验室试验段的天花板与地面。水平方向的弯曲刚度为6155 N/m，加装弹性体后，无风工况分析测得其固有频率f0 = 7.8 Hz，阻尼比ξ = 0.1%。 流速采用皮托管（Pitot tube）测量，圆柱的横向水平位移通过激光进行采集。模型尾流的三维流场流速采用眼镜蛇探头（cobra probe）测量，并与激光采集的圆柱位移实现同步记录。在圆柱跨中位置，其圆周面均匀分布有36个测压孔。本数据集包含四组实验，分别对应来流四种不同的湍流工况：无湍流网格工况，以及三种网格尺寸各异的湍流网格工况，相关网格细节详见随数据集附带的"grids.pdf"文件。