The VORSEA Wind Tunnel Experiments
摘要
When preparing the installation of offshore wind turbines, the towers (cylindrical masts of large height supporting the hub and rotating blades) are first stored on harbor quayside and then moved on a special vessel for on-site installation. The possible vortex-induced vibration excitation of towers by wind is a main concern for the handler, leading to additional dampers need which are a source of expenditure and risks. The interest of the wind energy industry towards the response of finite-length circular cylinders encouraged recent research works on gust buffeting (e.g., Mannini et al., 2023) and vortex shedding (e.g., Kurniawati et al., 2024) aimed to clarify subject matters where design standards lack information; however, many aspects are still missing as a clear understanding of how the aerodynamic loads evolve from subcritical to supercritical Reynolds number regimes and the influence on wind-induced vibrations of the movement of the base of the tower associated with the motion of the vessel during navigation. These wind tunnel experiments aim to investigate vortex shedding on finite-length circular cylinders. The geometry is compatible with real cases of the wind energy industry and Reynolds numbers from subcritical to supercritical regimes are investigated with focus on aerodynamic loads and the effect of the tilting movement of the base.