摘要
为了提高垂直轴风力机的风能转化率,提出了一种新型升阻互补型垂直轴风力机.对大厚度航空翼型进行切割得到了升阻型叶片翼型,基于CFD数值模拟技术,分析了改进后翼型以及利用该翼型制成的端部封闭和不封闭的两种垂直轴风力机的气动特性.计算结果表明,改进后的翼型具有较高的升力系数,但失速特性和阻力特性较差,两种垂直轴风力机在额定工况下均产生了较高的风能利用系数,而端部不封闭叶片由于叶梢部位产生湍动能较低,具有更好的动力输出,叶片在逆风运行时,充分发挥了翼型外表面的升力性能.
In order to improve the wind energy conversion efficiency of vertical-axis wind turbines （VAWT）, a new lift-drag complementary vertical-axis wind turbine is proposed, in which the lift-drag complementary blade aerofoil is obtained from cutting the aviation airfoil with large thickness. Based on the CFD numerical simulation technique, the aerodynamic characteristics of the improved airfoils and two VAWT with two improved airfoils, one being end closed and another without end closure, are analyzed. The calculation shows that the improved airfoil will have high lift coefficient, but poorer stall characteris- tics and drag characteristics. The both of two VAWT will produce higher power coefficient under rated condition. Due to the lower turbulentkinetic energy in blade tip area, the blade with open end will have better power output. The lift performance of airfoil outer surface will be brought into full play when the blade runs against the wind.
出处
《兰州理工大学学报》
CAS
北大核心
2016年第4期55-59,共5页
Journal of Lanzhou University of Technology
基金
江苏高校协同创新2011计划项目(苏政办发[2013]56号)
南通市科技计划引导专项(2013400303)
关键词
垂直轴风力机
升阻互补
结构化网格
边界层
风能利用系数
湍动能
vertical-axis wind turbine
lift-drag complement
structured grid
boundary layer
power coefficient
turbulent kinetic energy
作者简介
顾荣蓉（1982-），女，江苏盐城人，博士生，讲师．
