叶尖小翼对风力机叶片气动特性影响研究  

Influence of tip winglets on aerodynamic characteristics of wind turbine blades

作　　者：王亚娥 葛文澎 苗得胜 吴迪 Wang Yae;Ge Wenpeng;Miao Desheng;Wu Di(Ming Yang Smart Energy Group.,Ltd.,Zhongshan 528400,China)

机构地区：[1]明阳智慧能源集团股份公司,广东中山528400

出　　处：《可再生能源》2022年第5期639-644,共6页Renewable Energy Resources

基　　金：国家重点研发计划重点专项(2018YFB1501100)。

摘　　要：叶片外形优化是提升风力机气动性能的关键。文章基于STAR-CCM+软件,采用RANS法进行了叶尖小翼气动特性的研究。通过与Bladed计算结果进行对比,验证了此方法的可行性,在此基础上,研究了小翼扭角对叶片三维流场数值计算结果的影响。叶尖小翼减弱了叶尖附近的流动分离现象,增大了叶片压力面与吸力面之间的压差,从而提升了风力机的输出功率。当小翼其他设计参数相同时,负扭角对风力机性能的提升效果优于正扭角,小扭角对风力机性能的提升效果优于大扭角。总体上,小翼扭角对风力机功率和推力的影响较小,当风速相同时,功率增长率最大差值小于0.7%,推力增长率最大差值小于1%。The optimization of blade shape is the key to improve aerodynamic performance.In this paper,based on STAR-CCM+software,RANS method is used to study the aerodynamic characteristics of tip winglets.The feasibility of this method is verified by comparing with the BLADED calculation results.On this basis,the influence of winglet torsion angle on the numerical results of three-dimensional flow field of the blade is studied.The following conclusions are drawn:tip winglet weakens the flow separation phenomenon near the blade tip,increases the pressure difference between the pressure surface and the suction surface of the blade,and thus enhances the output power of the wind turbine;Under the wind speed of 4~10 m/s,compared with the straight blade,the power of the wind turbine is increased by 2.2%~3%and the thrust is increased by 2%~3.6%after the winglet is added.When the other design parameters of the winglet are the same,the negative twist angle is better than the positive twist angle,and the small twist angle is better than the large twist angle.However,on the whole,the winglet torsion angle has little influence on the power and thrust of the wind turbine.At the same wind speed,the maximum difference of power growth rate is less than 0.7%,and the maximum difference of thrust growth rate is less than 1%.This paper provides a reference for the blade modification design based on the actual engineering project,which is of great engineering practice significance.

关 键 词：叶尖小翼 风力机 气动特性 叶尖段 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]