水平轴风力机叶根外型改进  

Root Geometry Improvement of Horizontal Axis Wind Turbine Blade

作　　者：刘智益[1] 李媛[1] 康顺[1,2] 赵萍[3] 李杰[3] 王建录[3] 

机构地区：[1]华北电力大学电站设备状态检测与控制教育部重点实验室,北京102206 [2]西安现代控制技术研究所,陕西西安710065 [3]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《工程热物理学报》2013年第12期2279-2283,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51176046);"十一五"国家科技支撑计划重大项目(No.2006BAA01A04)

摘　　要：风力机叶片根部过渡段和圆柱段会产生较大的流动阻力,影响风力机的气动性能。延伸叶根翼型段是提高风力机气动性能的方法之一.本文采用翼型截面来代替过渡段和圆柱段,对2.5 MW风力机DF90叶片根部进行改进,并分别采用两种扭角规律进行造型,与原始叶片进行对比。结果表明,叶根改型后会改善一部分叶展区域的流动,从而提高叶片的功率,高风速条件下更为明显.在低风速条件下,叶根处翼型截面扭角的增大有利于功率的提高;在高风速条件下,扭角的增大有助于减小轴向推力的增加值.Blade root of horizontM axis wind turbine, which includes the transition section and the cylindrical section, would produce great flow resistance to influence the aerodynamic performance of wind turbine. So extending airfoil section is one of the methods to improve the aerodynamic performance. And this method was used in this paper based on a 2.5 MW wind turbine DF90. Two twist angle distributions were used in the paper, comparing with the initial blade. The results showed that the modified blades can improve the power, which was more obvious at high speed condition. In addition, increasing the twist angles of the root can improve the power at low speed condition. At high speed condition, increasing the twist angles can reduce the increment of axial thrust.

关 键 词：风力机 叶根 气动性能 流动分离 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]