新型升阻混合型垂直轴风力机气动特性研究

Aerodynamic characteristics research of a new type lift-drag hybrid vertical axis wind turbine

考虑S型与H型垂直轴风力机的特点,设计了一种新型升阻混合型垂直轴风力机,采用CFD法计算其启动与气动性能。结果表明,原始H型垂直轴风力机数值结果与试验值在各工况下吻合良好;新型升阻混合型垂直轴风力机不同方位角下的启动力矩均大于原始H型风力机,最小及最大值分别提升232%和83.3%;S型风轮输出功率随叶片重叠比增加而减小,完全重叠时输出功率基本为0;新型升阻混合型垂直轴风力机最大风能利用率为0.298,具有更复杂的流场特性。

Considering the characteristics of S-type and H-type vertical axis wind turbines,a new type lift-drag hybrid vertical axis wind turbine was designed,and its starting performance and aerodynamic performance were simulated by CFD method.The results show that the CFD results and experimental results of the original H-type rotor have good agreement during the range of calculation.The starting torque of the new type lift-drag hybrid vertical axis wind turbine is higher than that of the original H-type vertical axis wind turbine at every inflow azimuth,and the minimum and maximum starting torque were increased by 232%and 83.8%respectively.The output power of S-type rotor decreases with the increase of overlap ratio.and its output power is 0 when the overlap ratio is 1.The new type lift-drag hybrid vertical axis wind turbine achieves a maximum wind power coefficient of 0.298,and it has more complicated flow characteristics.