垂直轴风力机叶片翼型选取数值分析

Vertical Axis Wind Turbine Blade Airfoil Selection and Aerodynamic Performance Numerical Analysis

以H型垂直轴风力机为主要研究对象,探索升力型叶片翼型的选取,基于三类九种翼型在风力机运行工况下的仿真结果,分析翼型相对厚度、弯度和翼型种类对于垂直轴风力机风能利用率的影响。通过数值计算分析各因素对于气动性能的影响规律,分析风轮各叶片周围涡量场的变化,并讨论气动载荷变化的原因。结果表明:翼型相对厚度的在一定范围内的增加可以提升风力机性能;翼型弯度的增加则会造成风力机性能下降;水平轴风力机翼型在垂直轴风力机上难以获得理想性能表现,选取翼型时可优先考虑对称翼型。

Taking H-type vertical-axis wind turbine as the main research object,we explore the selection of lift-type blade airfoils,and analyze the influence of relative thickness,curvature and type of airfoils on the utilization of wind energy of vertical-axis wind turbine based on the simulation results of nine airfoils of three types in the operating conditions of the wind turbine.The influence of each factor on aerodynamic performance is analyzed through numerical calculations,and the change of vortex field around each blade of the wind turbine is analyzed,and the reasons for the change of aerodynamic loads are discussed.The results show that the relative thickness of the airfoil can be increased within a certain range to improve the performance of the wind turbine.The increase of the curvature of the airfoil will cause a decrease in the performance of the wind turbine.It is difficult to obtain the ideal performance of horizontal axis wind turbine airfoils on vertical axis wind turbines,and symmetrical airfoils can be prior-itized in the selection of airfoils.