Numerical study of icing impact on the performance of pitch-regulated large wind turbine

This paper presents a study of the impact icing on performance pitch-regulated large wind turbine. Numerical simulations six blade sections NREL 5 MW turbine at various free stream velocities are performed. Blade Element Momentum (BEM) method along Computational Fluid Dynamics (CFD) bases multiphase numerical used for this study. Analysis shows that simulated parameters in good agreement with real conditions each element during operation, except three-dimensional effects. The analysis accreted ice shapes and air/droplet flow fields around profile was carried out, calculation aerodynamic performance, energy production degradation also tip is most affected by icing, it characterized greatest changes performance. Maximum reduction estimated to be 24%.