초록 열기/닫기 버튼
Multi-MW wind turbines have very long and large blades. There are some factors that exert asymmetric dynamic thrusts on a blade. Wind shear is one of the main factors that produce asymmetric dynamic loads on a blade of a multi-MW wind turbine. In this paper, a 2 MW on-shore wind turbine that has three blades with a rotor radius of 40 m and hub height of 60 m is considered and thrust variations on a blade under wind shear are calculated according to the wind speed. The commercial software GH Bladed is used for calculating thrust variations based on the blade element momentum (BEM) method. And the amplitudes of the thrust variations by wind shear with varying wind speed are investigated by introducing a "wind shear coefficient of thrust variation" based on the steady-state value of thrust without wind shear.
키워드열기/닫기 버튼
Blade, Coefficient of thrust variation, Thrust variation, Onshore wind turbine, Wind shear
