This study investigates the impact of typhoon-induced severe convective weather on the structural performance of blades, focusing on blade 1 at a 180° phase angle and blade 2 at a 60° phase angle of the NREL 5 MW wind turbine. The research considers normal wind conditions, typhoon conditions, and wind-rain coupled conditions with varying rainfall intensities. The study analyzes surface pressure, displacement, and equivalent stress at different blade sections, through numerical simulations based on WRF and ANSYS platforms. The results show that the aerodynamic characteristics of both blades are similar and stable under normal wind conditions. Under typhoon and wind-rain coupled conditions, significant differences in aerodynamic loads appear between blade 1 and blade 2, particularly at high rainfall intensities, where the aerodynamic pressure on blade 1 becomes more complex. Across all wind conditions, blade 2 exhibits greater variations in axial and circumferential displacement than blade 1, mostly in the negative direction, indicating that it experiences more complex force interactions. Additionally, blade 2 consistently has higher total displacement and equivalent stress than blade 1, especially under extreme wind conditions, posing greater structural safety challenges. These findings highlight the significant impact of typhoon-induced severe convective weather on wind turbine blade structural performance. Therefore, in wind turbine design and operation, it is crucial to account for extreme weather effects on blade stability and reliability to ensure safe and stable turbine operation.
Key words
extreme weather /
wind turbine blade /
numerical simulation /
wind-rain coupling /
structural performance
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