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基于动量叶素理论设计计算了风力发电机叶片几何结构形状和运行工况,建立了风力发电机叶片有限元模型,对风力发电机叶片的气动特性进行了数值研究,给出了风力机风场的风速、压强分布。研究表明,在大攻角及小转速下,叶尖损失对风力发电机叶片功率和叶片效率的影响更加明显;变工况下,叶片功率曲线及叶片效率曲线基本服从翼型及叶片气动特性的规律,曲线斜率受叶片升阻比、失速效应和叶尖损失的影响。
Based on the theory of momentum valence factor, the geometry and shape of wind turbine blades were calculated and calculated. The finite element model of wind turbine blade was built and the aerodynamic characteristics of wind turbine blades were numerically studied. The wind farm wind field The wind speed and pressure distribution. The results show that the effect of blade tip loss on the blade power and blade efficiency is more obvious at high angle of attack and small rotation speed. Under variable load conditions, the blade power curve and blade efficiency curve basically obey the aerodynamic characteristics of airfoil and blade The law, the slope of the curve is affected by the ratio of leaf lift to drag, stall effect and tip loss.