Abstract In the present work, a numerical study aimed to analyse the effect of an extreme loading event on a Horizontal Axis Wind Turbine (HAWT) is performed. A 3D unsteady CFD model of the NREL Phase VI small-sized wind turbine is validated against experimental data, with the incompressible solver of ANSYS Fluent and an unstructured moving mesh strategy. Then the Extreme Operating Gust (EOG) model from IEC 61400-2 is considered as the inlet condition. The results of the aerodynamic response and of the structural ultimate check, based on the IEC guidelines, are presented for both the operating and the parked turbine, in order to underline the benefit of the safety position in terms of lower stress transferred to the critical root section.

中文翻译：

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小型风力涡轮机：阵风条件下空气动力性能评估的数值研究

摘要 在目前的工作中，进行了旨在分析极端载荷事件对水平轴风力涡轮机 (HAWT) 的影响的数值研究。NREL 第六阶段小型风力涡轮机的 3D 非定常 CFD 模型根据实验数据进行了验证，使用 ANSYS Fluent 的不可压缩求解器和非结构化移动网格策略。然后将来自 IEC 61400-2 的极端操作阵风 (EOG) 模型视为入口条件。空气动力学响应和结构极限检查的结果，基于 IEC 指南，针对运行和停放的涡轮机提供，以强调安全位置在传递到临界根部的应力较低方面的好处部分。