一种低空急流对水平轴风力机气动性能的影响  

Effect of a kind of low-level jet on aerodynamic performance of horizontal-axis wind turbine

作　　者：杨从新[1] 罗颂 李寿图 张旭耀[1] YANG Cong-xin;LUO Song;LI Shou-tu;ZHANG Xu-yao(College of Energy and Power Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院

出　　处：《兰州理工大学学报》2020年第1期53-59,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(11262011);国家重点基础研究发展计划(973计划)(2014CB046201)

摘　　要：以一台1.5 MW变桨变速型三叶片风力机为研究对象,探讨了三种入流条件下水平轴风力机气动性能的异同,着重研究了一种典型低空急流对水平轴风力机气动性能的影响.结果表明:低空急流下风轮的功率和推力比均匀流和剪切流的大;低空急流下叶片表面压力总体大于其他两种流动,急流衰减内的翼型截面在吸力面中段存在一个比剪切更加显著的压力突降区;叶片各截面的法向力系数和切向力系数整体大于其他两种流动;低空急流下各截面的攻角比剪切流的大0.05%~36.66%,叶片表面的失速区尤其是叶根附近的失速区相对其他两种流动更大,分离线向前缘靠近,急流衰减内的翼型截面分离涡现象更加明显;对不同特征低空急流下水平轴风力机气动性能影响的研究将在未来的工作中进行.An 1.5 MW variable-pitch variable-speed three-blade horizontal-axis wind turbine was taken as research object.The similarities and differences of its aerodynamic performance were investigated under the three kinds of inflows and the effect of a typical low-level jet on its aerodynamic performance was studied emphatically.The results showed that the power and thrust of the rotor under low-level jet are larger than those under the uniform flow and the flow with wind shear.Surface pressure of the blade under low-level jet is generally larger than those of the other two inflows and there is a more noticeable flash-down zone of pressure on the section side of airfoil in the middle section due to jet attenuation.Under the condition of low-level jet,the normal and tangential force coefficients of the blade are generally larger than ones under the other two inflows.The attack angles of each airfoil section under low-level jet are larger than ones unders shear flow by 0.05%~36.66%,the stall region on the blade surface are larger than those under other inflows,especially near blade root,the separation line moves close to the leading edge,and the separation vortexes on airfoil sections due to jet attenuation are more obvious.The study of effects of different kinds of low-level jets on aerodynamic performance of horizontal-axis wind turbine will be done in the future.

关 键 词：水平轴风力机 低空急流 气动性能 CFD 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TM315[电气工程—电机]