Development of a dynamic wake model accounting for wake advection delays and mesoscale wind transients

Abstract With tip height often above 200 meters, currently installed wind turbines are increasingly interacting with the atmospheric boundary layer. Therefore, research intends to develop a new dynamic wake model that considers weather transient inputs. The Flow Redirection and Induction in Steady State (FLORIS) framework has been proven be powerful modelling tool even though lacking dynamical effects. An extension of FLORIS is presented order include advection delays between turbines, time-varying spatially heterogeneous conditions. so-called Observation Points (OPs) generated at rotor centre location. Following Lagrangian approach, OPs convected downstream, along turbine, defining centreline. It during this process dynamics turbine background flow field unsteadiness included. Finally, using same approach implemented for yaw-misalignment deflection, shifted match unsteady developed validated against Large Eddy Simulation inflow variable control interactions. applied simulation Horns Rev farm sinusoidally direction show an hysteresis power extraction curve.