基于自由尾迹法的小翼形状对风机气动性能影响分析  

Effect of blade tip modifications on wind turbine aerodynamic performance using vortex model

作　　者：李少华[1] 刘燕[1] 岳巍澎[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《空气动力学学报》2015年第1期120-124,共5页Acta Aerodynamica Sinica

摘　　要：基于(势流)涡方法开发了水平轴风力机叶片气动性能分析程序,采用自由尾迹模型对增加O型小翼和L型小翼后的叶片气动设计性能进行分析,计算了风力机设计工况下的涡位置及诱导速度分布等气动性能参数,对比了增加小翼后功率输出情况。结果表明,增加小翼后风力机叶片在设计工况下功率系数有明显增加,下风向小翼功率提升高于上风向小翼。A design and analysis procedure for rotor blades is developed based on vortex theo-ry.Based on free wake model,the aerodynamic performances of horizontal axis wind turbine ro-tor by adding spiroid O winglets and L winglet at the tip of the blade are studied numerically,the vortex location and induced velocity distribution in different conditions are investigated.The results show that the presence of winglet at the tip of the wind turbine blade improves the power coefficient at the design wind speeds,and downwind winglets are superior to upwind ones with respect to optimization of power.

关 键 词：水平轴风力机 涡理论 尾迹模型 气动性能 叶尖小翼 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]