主动式偏转襟翼垂直轴风力机气动特性分析
Analysis of Aerodynamic Characteristics of Vertical Axis Wind Turbine with Active Deflection Flap
余豪 1叶舟 2阮仁浩 1李春2
作者信息
- 1. 上海理工大学能源与动力工程学院,上海 200093
- 2. 上海理工大学能源与动力工程学院,上海 200093;上海市动力工程多相流动与传热重点实验室,上海 200093
- 折叠
摘要
为改善垂直轴风力机效率较低及自启动困难问题,提出一种在迎风区内开启、背风区内闭合的主动式偏转襟翼结构.以NACA0021为基础翼型,采用计算流体力学方法对偏转襟翼垂直轴风力机叶片瞬时转矩、风能利用系数、平均切向力及压力场进行数值分析.结果表明:偏转襟翼结构可使叶片表面压差增大、叶片转矩升高,垂直轴风力机在低叶尖速比范围内的风能利用系数得到不同程度的提升;当叶尖速比为2.50、襟翼水平长度为0.4c时,主动式偏转襟翼垂直轴风力机风能利用系数较原始垂直轴风力机最高可提升13.9％.
Abstract
In order to improve the low efficiency and difficulty of self-starting of vertical axis wind tur-bines,an active deflection flap structure that opens in the windward area and closes in the leeward area was proposed.Based on NACA0021,the instantaneous torque,wind energy utilization coefficient,aver-age tangential force and pressure field of blades of vertical axis wind turbine with deflection flaps were nu-merically analyzed by computational fluid dynamics method.The results show that the deflection flap structure can increase the blade surface pressure difference,increase the blade torque,and improve the wind energy utilization coefficient of the vertical axis wind turbine in the range of low blade tip speed rati-o;when the blade tip velocity ratio is 2.50 and the horizontal length of the flap is 0.4c,the wind energy utilization coefficient of the vertical axis wind turbine with active deflection flap is 13.9％higher than that of the original vertical axis wind turbine at most.
关键词
垂直轴风力机/流动控制/偏转襟翼/气动特性Key words
vertical axis wind turbine(VAWT)/flow control/deflection flap/aerodynamic characteris-tics引用本文复制引用
基金项目
国家自然科学基金(51976131)
国家自然科学基金(51676131)
上海"科技创新行动计划"地方院校能力建设项目(19060502200)
出版年
2024
NETL
NSTL
万方数据