摘要
采用带转捩的k-ω SST湍流模型,求解RANS方程获得对风工况下风力机叶片周围的流场,使用inverse BEM方法后处理获取局部动压和局部迎角,并对叶片三维旋转流动进行详细分析。数值模拟结果在低速轴扭矩、剖面载荷系数、压力分布等方面都与实验值吻合得较好。为提供较深入的关于三维旋转效应物理机理的理解,与相似入流条件下二维流动进行比较,详细讨论三维旋转效应对剖面载荷和流场结构的影响极其成因,研究表明三维旋转效应在叶根分离区影响显著,对剖面延迟分离有明显作用。
Numerical simulations of flow field around wind turbine blades in non-yawed condition were performed in present work. The turbulence was modeled by the k-ω SST eddy viscosity model with transition correction and inverse BEM method was used to obtain sectional dynamic pressure and angle of attack in post-processing. The obtained results show good agreements with the NREL experimental data in aspects of low-speed shaft torque and sectional aerodynamic coefficients. With the aim of providing a deep understanding of three-dimensional rotational stall-delay effect,comparison between two-dimensional flow and three-dimensional flow of blade section under similar inflow conditions has been made. Furthermore,the effects on sectional loads and flow field are discussed in detail,and the associated reasons are provided. The stall-delay effect has been demonstrated strated strong on inner blade sections and in separated flow.
作者
朱呈勇
王同光
邵涛
Zhu Chengyong;Wang Tongguang;Shao Tao(Jiangsu Key Laboratory of Hi-Tech Research far Wind Turbine Design, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第6期1747-1755,共9页
Acta Energiae Solaris Sinica
基金
国家重点基础研究发展(973)计划(2014CB046200)
江苏省自然科学基金(BK20140059)
江苏省优势学科建设工程
关键词
旋转流动
风力机
计算流体力学
失速延迟
rotational flow
wind turbine
computational fluid dynamics
stall delay
