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This work focuses on the validation of the dynamic wake meandering (DWM)model against large eddy simulation (LES). The wake deficit, mean deflection,and meandering under different wind turbine misalignment angles in yaw andtilt, for the IEA 15MW wind turbine, for two turbulent inflows with differentshear and turbulence intensities are compared. Simulation results indicate thatthe DWM model as implemented in FAST.Farm shows very good agreement with theLES (VFS-Wind) data when predicting the time-averaged horizontal and verticalwake, especially at x > 6D and for cases with positive tilt angles (> 6deg).The wake dynamics captured by the DWM model include the large-eddy-induced wakemeandering at low Strouhal number (St < 0.1). Additionally, the wakeoscillation induced by the shear layer at St approx. 0.27 is captured only byLES. The mean and standard deviation of the wake deflection, as computed by theDWM, are sensitive to the size of the polar grid used to calculate thespatial-averaged velocity with which the wake planes meander. The power outputof a turbine in the wake of a wind turbine in free-wind deflected by a yawangle gamma = 30deg is almost doubled compared to the fully-waked condition.

Validation of the dynamic wake meandering model against large eddy simulation for horizontal and vertical steering of wind turbine wakes