Entrainment model for wind turbine wakes considering blockage effect

Abstract The entrainment model applied firstly by P. Luzzatto-Fegiz can predict the streamwise velocity of far-wake more accurately than traditional models (e.g., Jensen model, Frandsen model). current however, neglects wind speed drop approaching rotor caused blockage effect, phenomenon which cannot be considered in recovery region, further affecting precision wake prediction. Hence, this paper proposes an considering effect. We adopt several numerical simulation results to analyze performance with vortex cylinder for vicinity. initial parameter Einitial calculates, according formula breakdown position tip vortices proposed J.N. Sørensen. Enear-wake obtain length near-wake defined E. J. Vermeulen. linearized entrainment-parameterized expression we develop combines linearization hypothesis above two positions and their values. consists main components: modified validated against advanced Gaussian Bastankhah Porté-Agel (BPA) LES cases. demonstrate that significantly improves distribution.