Numerical Simulation of Aerodynamic Performance of Offshore Floating Wind Turbine under Periodic Motion
Offshore wind power has formed a trend from fixed to floating.Based on the NREL 5 MW wind turbine model,the aerodynamic performance of the wind turbine under periodic motion is numerically studied by using the computational fluid dynamics method and the overlapping grid technology.The influence of the tower effect is considered.The effects of surge,pitch and their superposition on the aerodynamic load and wake vortex of the floating wind turbine are analyzed.The results show that the numerical results are in good agreement with the existing experimental data.The aerodynamic load of the wind turbine is sensitive to surge and pitch motion.Under the same working conditions,the power change of the wind turbine is more intense than the thrust change.The wind turbine blade will form two different wake vortices at the tip and root of the blade,and the wake vortices are more easily dissipated under the superimposed motion.
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