尾缘襟翼垂直轴风力机气动性能分析  

Aerodynamic Performance Analysis of Vertical Axis Wind Turbine with Trailing Edge Flap

作　　者：余豪 叶舟[1,2] 朱致远 李春 YU Hao;YE Zhou;ZHU Zhiyuan;LI Chun(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,China,200093;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer for Power Engineering,Shanghai,China,200093)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《热能动力工程》2024年第10期169-176,共8页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51976131,51676131);上海“科技创新行动计划”地方院校能力建设项目(19060502200)。

摘　　要：为减弱垂直轴风力机流动分离,提升其气动效率,设计一种伸出长度和偏转角度可变化的尾缘襟翼结构。以NACA0021为基本翼型,采用计算流体力学方法对尾缘襟翼垂直轴风力机瞬时转矩、风能利用系数、翼面压力系数及流场进行数值分析。结果表明:尾缘襟翼结构可有效减弱流动分离,使翼型表面压差增大、转矩升高;在低叶尖速比范围内垂直轴风力机的风能利用系数得到不同程度的提升;当叶尖速比为2.5,襟翼偏转角度为5°,伸出水平长度为0.1c时,尾缘襟翼垂直轴风力机气动性能最佳,其最高风能利用系数较原始垂直轴风力机可提升7.1%。In order to reduce the flow separation of the vertical axis wind turbine and improve its aerody-namic efficiency,a trailing edge flap structure with variable extension length and deflection angle was de-signed.Taking NACA0021 as the basic airfoil,the instantaneous torque,wind energy utilization coeffi-cient,airfoil pressure coefficient and flow field of the vertical axis wind turbine(VAWT)with the trailing edge flap were numerically analyzed by computational fluid dynamics(CFD)method.The results show that the trailing edge flap structure can effectively weaken the flow separation,increase the surface pres-sure difference and increase the torque of the airfoil.The wind energy utilization coefficient of the vertical axis wind turbine in the range of low blade tip speed ratio is improved.When the blade tip speed ratio is 2.5,the flap deflection angle is 5°,and the extension horizontal length is 0.1c,the aerodynamic per-formance of the vertical axis wind turbine with trailing edge flap is the best,and its highest wind energy utilization coefficient can be increased by 7.1%compared with the original vertical axis wind turbine.

关 键 词：垂直轴风力机 流动分离 尾缘襟翼 气动效率 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]