Physics of Fluids, Год журнала: 2025, Номер 37(4)

Опубликована: Апрель 1, 2025

The blades of offshore wind turbines often experience trailing edge cracking after being struck by lightning, thereby affecting the aerodynamics and safety turbines. A numerical simulation was used to analyze effects crack (TEC) height depth on S809 airfoil's aerodynamic performance flow field compare changes in noise vortex structures for airfoils with different levels cracking, providing insights into underlying mechanisms. findings reveal that TECs do not affect stall angle attack but significantly degrade before stall. Large heights lead further reductions performance, while effect is comparatively minor. result a substantial reduction noise. As grows, extent diminishes, whereas increasing results more significant reduction. Before occurrence TECs, radiated airfoil exhibits dipole distribution pattern. disrupt at edge, causing fragmentation. vortices develop downstream, their strength diminishes further, inter-vortex disturbances decrease, ultimately leading

Язык: Английский