摘要
针对翼型的相对厚度对翼型气动性能影响,以相对厚度分别为21%、25%、30%、35%的DU21、DU25、DU30、DU40四种翼型作为研究对象,采用网格划分软件Gambit对翼型流场划分网格,采用Fluent14.0对翼型进行气动性能分析,研究了相对厚度对翼型气动特性的影响规律。研究表明,翼型的气动性能受翼型相对厚度的影响较大,翼型最大升阻比随翼型的相对厚度增大而减小,翼型的最大升力系数及失速攻角随相对厚度的增大而增大。研究结果对后续的风力机叶片的设计和叶片优化具有一定的参考价值和指导意义。
As far as relative thickness of airfoil has an effect on aerodynamics of airfoil, the airfoil DU21 ,DU25,DU30,DU35 is selected as researched object. The flow field model is meshed with Gambit6.3 , and its aerodynamics is calculated with commercial CFD software Fluentl4.0. The results show that the aerodynamics is affected greatly by relative thickness of airfoil. The maximum lift coefficient and attack angle of stall increased with increasing of relative thickness of airfoil. However the lift to drag ratio decreased with the increasing of elative thickness of airfoil. The result provides a frame of reference for wind turbine blade design and optimization, and has some significance for the blade optimization.
出处
《机械设计与制造》
北大核心
2016年第3期79-81,85,共4页
Machinery Design & Manufacture
基金
中央高校基本科研业务专项资金项目(2014XS80)
国家自然科学基金项目(11302076)
关键词
翼型
风力机
相对厚度
升阻比
Airfoil
Wind Turbine
Relative Thickness
Lift-to-Drag
