Wind Turbine Wake Vortex Influence on Helicopter Rotor Trim

The wake of wind turbines is modeled as a tip vortex helix with a vortex strength estimated from its rotor thrust. A Bo105 helicopter and an analytical isolated rotor model are subjected to the wake. In both cases the trim perturbations generated by the wake are computed and compared to each other. It is found that the rotor control margins are sufficient to compensate the wake disturbance.