尾缘后分流板对垂直轴风力机气动性能影响研究
Study on the Effect of Trailing Edge Flap on Aerodynamic Performance of Vertical Axis Wind Turbine
梁澍 1张宇 2陈建 1李春1
作者信息
- 1. 上海理工大学,能源与动力工程学院,上海 200093
- 2. 中车山东公司,山东 济南 250021
- 折叠
摘要
为提高垂直轴风力机(Vertical Axis Wind Turbine,VAWT)的气动效率,受圆柱后分流板可减少升阻力系数波动的启发,提出了尾缘后分流板的新型流动控制方式.以NACA0015 翼型为对象,研究分流板长度以及其与翼型的间隙对翼型气动性能的影响,同时探究分流板在不同叶尖速比工况下对VAWT气动效率的影响.结果表明:尾缘后分流板对翼型可起到增升减阻的效果;带尾缘后分流板的VAWT风能利用率得到有效提高,在低尖速比工况下风能利用率均高于原始风力机,在高尖速比工况下风能利用率最大提高约25.78%;尾缘后分流板的存在有利于VAWT的尾流恢复,在相同尖速比工况下,带有尾缘后分流板的VAWT的尾迹长度短于原始风力机.
Abstract
In order to improve the aerodynamic efficiency of a vertical axis wind turbine(VAWT),in-spired by the fact that the cylindrical rear splitter flap can reduce the fluctuation of the lift drag coeffi-cient,a new flow control method for the rear splitter flap at trailing edge was proposed.Taking the NACA0015 airfoil as the object,the influence of the length of the flap and the gap between the flap and the airfoil on the aerodynamic performance of the airfoil was studied.At the same time,the influence of the flap on the aerodynamic efficiency of the VAWT under different tip speed ratio conditions was ex-plored.The results show that the VAWT with a rear splitter flap at trailing edge can effectively improve the wind energy utilization rate and reduce the resistance of the airfoil.The wind energy utilization rate is higher than that of the original wind turbine under the low tip speed ratio condition,and the maximum in-crease in wind energy utilization is about 25.78%under the high tip speed ratio condition.The presence of the trailing edge flap is beneficial to the wake recovery of the VAWT,and the wake length of the VAWT with the trailing edge flap is shorter than that of the original wind turbine under the same tip speed ratio condition.
关键词
垂直轴风力机/流动控制/尾缘后分流板/气动特性/风能利用率Key words
vertical axis wind turbine(VAWT)/flow control/rear splitter flap at trailing edge/aerody-namic performance/utilization of wind energy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据