摘要
针对垂直轴风力机实际运行过程中叶片攻角随相位角周期性变化引发的气动性能降低问题,提出主动式凹槽-襟翼结构。以NACA0021翼型为研究对象,采用计算流体力学方法对不同控制策略下凹槽-襟翼结构进行了数值分析。结果表明:与传统固定凹槽-襟翼相比,垂直轴风力机叶片尾缘布置主动式凹槽-襟翼时气动效率最高可提升36.78%;凹槽-襟翼结构可提高低尖速比下叶片平均转矩,并提高自启动性能;当超过最佳尖速比时,整机气动性能逐渐降低,且主动式凹槽-襟翼对风力机气动性能的提升效果随着尖速比继续增大而下降。
In order to reduce the aerodynamic performance degradation caused by the periodic chance of blade attack angle with phase angle during the operation of the vertical axis wind turbine,the active dimple-flap was proposed.Taking NACA0021 airfoil as the research object,the aerodynamic performance of the vertical axis wind turbine with dimple-flaps under different control strategies was numerically analyzed by using computational fluid dynamic method.Results show that compared with the traditional fixed dimple-flaps,the aerodynamic efficiency of the vertical axis wind turbine with active dimple-flaps at the trailing edge can be improved by 36.78%.The dimple-flap structure can increase the blade torque at low tip speed ratio and improve the self-starting performance.When the optimum tip speed ratio was exceeded,the aerodynamic performance of the whole machine decreases gradually,and the effect of the active dimple-flap on the aerodynamic performance of the wind turbine decreases with the increase of the tip speed ratio.
作者
李根
缪维跑
李春
刘青松
张万福
向斌
金江涛
LI Gen;MIAO Weipao;LI Chun;LIU Qingsong;ZHANG Wanfu;XIANG Bin;JIN Jiangtao(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2021年第6期511-518,共8页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(51976131,51676131)
上海“科技创新行动计划”地方院校能力建设资助项目(19060502200)。
关键词
垂直轴风力机
主动控制
凹槽-襟翼
尖速比
气动性能
vertical axis wind turbine
active control
dimple-flap
tip speed ratio
aerodynamic performance
作者简介
李根(1995-),男,河南驻马店人,硕士研究生,研究方向为风力机空气动力学;通信作者:李春,男,教授,博导,电话(Tel.):19121759753,E-mail:lichunusst@163.com。
