Based on dynamic blade element momentum and geometrically exact beam theory
the effect of aerodynamic coupling effect on the load characteristics of IEA-15 MW wind turbines under wind shear conditions are studied in this paper. The results show that the wind turbine loads are similar to simple harmonics under the wind shear condition
and the flexible deformation of the blades will lead to the reduction of the wind turbine loads. Due to the dynamic inflow effect
unsteady aerodynamic characteristics of airfoil and blade deformation
the delay of wind turbine load response will increase the yaw torque of wind turbine. With the increase of wind shear coefficient
the mean value and fluctuation amplitude of wind turbine power
thrust
wind turbine pitch moment and yaw moment increase
and the hysteresis of blade load response becomes more obvious.
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