摘要
为提高垂直轴风力机气动效率,基于仿生学原理,以鱼类尾鳍为仿生对象,提出在翼型尾缘布置仿生尾鳍结构,通过主动控制使其随叶片方位角变化而运动。以NACA0021为基础翼型,通过计算流体动力学(CFD)数值模拟,研究仿生尾鳍对垂直轴风力机气动性能的影响,对比分析原始翼型、固定尾鳍以及施加控制策略的主动尾鳍翼型垂直轴风力机风能利用系数、单叶片转矩系数、涡量云图及压力系数。研究表明:主动控制策略下仿生尾鳍可有效抑制流动分离;风能利用系数较原始翼型及固定尾鳍翼型最大可分别提高18.3%和26.7%;可使最佳工况向低尖速比方向移动,提高垂直轴风力机运行稳定性。
In order to improve the aerodynamic efficiency of vertical axis wind turbine(VAWT),based on the principle of bionics,the bionic tail fin of fish was used as the bionic object,and the bionic tail fin structure was proposed to be arranged at the trailing edge of the airfoil,and its movement was made with the change of blade azimuth through active control.Using NACA0021 as the base airfoil,the effect of the bionic tail fin on the aerodynamic performance of the vertical axis wind turbine was studied by computational fluid dynamics(CFD)numerical simulation,and the wind energy utilization coefficient,single blade torque coefficient,vortex cloud diagram and pressure coefficient of the vertical axis wind turbine with the original airfoil,fixed tail fin and active tail fin airfoil by applying the control strategies were compared and analyzed.The study result shows that the bionic tail fin can effectively suppress the flow separation under the active control strategy.The wind energy utilization coefficient can be improved by 18.3%and 26.7%compared with the original and fixed tail fin airfoils,respectively.The optimal operating conditions can be shifted to the direction of low tip speed ratio,which improves the operational stability of the vertical axis wind turbine.
作者
阮仁浩
叶舟
李春
RUAN Renhao;YE Zhou;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 in Power Engineering,Shanghai,China 200093)
出处
《热能动力工程》
CAS
CSCD
北大核心
2024年第7期148-156,共9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)。
关键词
垂直轴风力机
仿生尾鳍
主动控制
流动分离
气动性能
vertical axis wind turbine
bionic tail fin
active control
flow separation
aerodynamic performance
