摘要
叶尖小翼能有效改善风力机风轮的气动性能。然而现有的叶尖小翼多通过叶片延长技术实现,从而改变了风轮直径,难以分析叶尖小翼对风力机气动效率的影响。针对这一问题,基于数值模拟方法,在NREL 1.5 MW风力机的基础上,分析了叶尖小翼不同安装位置下的风力机气动性能及流场特性。通过数值模拟分析,发现叶尖小翼能削减叶尖附近的流动分离现象,减弱叶尖涡,并增大风力机压力面和吸力面之间的压强差,从而提高风力机的气动效率。同时,研究发现离叶尖较近的小翼对风力机气动性能的改善效果更好。额定风速下,叶尖处安装小翼可使功率增加2.05%。
Blade tip winglets can effectively improve the aerodynamic performance of wind turbine wind wheels.However,most of the existing tip winglets are realized by blade extension technology,which changes the diameter of the wind turbine,so it difficult to analyze the effect of tip winglets on the aerodynamic efficiency of the wind turbine.To address this problem,based on numerical simulation method,the aerodynamic performance and flow field characteristics of the wind turbine with different mounting positions of the blade tip winglets are characterized on the basis of the NREL 1.5 MW wind turbine.Through numerical simulation analysis,it is found that the winglets can cut down the flow separation phenomenon near the blade tip,weaken the tip vortex,and increase the pressure difference between the pressure surface and suction surface of the wind turbine,thus improving the aerodynamic efficiency of the wind turbine.Meanwhile,it is found that the winglets closer to the blade tip had better improvement on the aerodynamic performance of the wind turbine.At rated wind speed,the installation of winglets at the blade tip can increase the power by 2.05%.
作者
王清
杨科
张翔
李德顺
Wang Qing;Yang Ke;Zhang Xiang;Li Deshun(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《太阳能学报》
北大核心
2025年第4期579-586,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(52166014)
甘肃省科技计划基础研究创新群体项目(21JR7RA277)
兰州理工大学红柳优秀青年人才支持计划(2022)。
关键词
风力机
叶尖小翼
气动性能
叶尖涡
wind turbine
blade tip winglet
aerodynamic performance
blade tip vortex
