一种半潜式商用6MW级风力机载荷数值模拟研究OACSTPCD

It is difficult to predict the aerodynamic load of the impeller and the motion state of the platform for marine floating wind turbines in their operating state.A commercial 6 MW floating wind turbine was investigated in this study.Based on the unsteady Reynolds average turbulence model,we performed a fully coupled numerical simulation and a wa-ter-tank model test.The results showed that the simulated values of the free attenuation period of a floating wind turbine are in good agreement with the experimental values on the aspects of pitch,yaw,and heave.However,certain errors ex-ist between the simulated and the experimental values in surge,sway,and yaw,which are mainly caused when catenary simplification is conducted for the mooring system in the numerical model.Under still water conditions,the fluctuation of the aerodynamic loads of a wind turbine is primarily affected by the tower shadow,the fluctuation in the acceleration of the engine room is positively correlated with the change in the thrust coefficient of the impeller,and the surge and pitch motions of the floating wind turbine are mainly impacted by the fluctuation in the aerodynamic load of the impeller;un-der the conditions with regular and irregular waves,the fluctuations in the impeller thrust are greatly affected by the surge and pitch motions of the floating foundation,the change in the thrust coefficient of the impeller is negatively corre-lated with the speed of the engine room.The motion of the floating wind turbine is majorly affected by the wave load,while the aerodynamic load remains relatively less affected.