摘要
风力机工作中产生三维旋转效应(three-dimensional rotationaleffect,TDRE)。研究TDRE与涡流发生器(vortex generators,VGs)耦合作用下的流动控制机理是优化应用VGs的关键。采用转捩模型,对安装反向(Counter-)、同向(Co-)VGs的NREL Phase Ⅵ风力机进行数值模拟。通过分析不同转速、风速下的叶片吸力面流场分布、各剖面流场、压力系数和输出转矩,来探究TDRE作用下VGs安装方式的影响以及Co-VGs的作用机理。模拟结果与NREL试验数据进行对比验证,计算结果与试验值吻合良好,输出转矩最大误差为9.3%。研究结果表明,VGs提高了叶片的输出功率,推后了翼型表面的分离点,改善了叶片表面气动流场;VGs增大了翼型压差,在前缘位置更加显著;在叶片各剖面达到失速攻角前后,Co-VGs的作用效果优于Counter-VGs。研究结果对VGs的工程应用具有一定的理论指导意义。
The three-dimensional rotational effect(TDRE)is created in the rotating wind turbines.The effect of vortex generators(VGs)coupling with TDRE is the key to enhancing the performance of VGs on wind turbine blades.The transition model is used to model the Phase VI wind turbines equipped with Counter-VGs and Co-VGs respectively,and their effects on wind turbine blades are investigated.The distribution of flow fields and pressure coefficient along blade(and blade section)surface,output torque of turbine is analyzed at different rotational speeds and wind speeds to explore the physical mechanism of Co-VGs affected by TDRE.The comparison between NREL test data and CFD results show that they are in good agreement,and the maximum error of torque output is 9.3%.The research results show that VGs increase the power output of wind turbine,delay the separation point on the airfoil surface,and improve flow field on the blade surface.VGs increase the pressure difference of two airfoil sides,and this phenomenon is more obvious at the leading-edge.The Co-VGs also behave better than Counter-VGs at the moments before and after stall angle of attack.The research provides theoretical guidance for VGs engineering applications.
作者
江瑞芳
赵振宙
陈明
冯俊鑫
王丁丁
凌子焱
JIANG Ruifang;ZHAO Zhenzhou;CHEN Ming;FENG Junxin;WANG Dingding;LING Ziyan(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2023年第12期4639-4647,共9页
Proceedings of the CSEE
基金
国家自然科学基金项目(51876054,11502070)
南通市民生科技重点项目(MS22019018)。
