摘要
探索添加不同后缘小翼对垂直轴风力机风轮振动频率的影响规律,采用可编程直流负载箱施加固定负载及运用数字变频技术调节风洞不同来流风速的方式对风力机进行动态测试,通过PULSE 21.0振动测试系统对风轮动频信号进行间接采集。对实验数据进行分析处理发现,随着风轮转速的增大,添加相同类型小翼的叶片一阶、二阶振动频率增幅会随小翼尺寸的增大而增加;添加扇型小翼的叶片振型频率的增幅比流线型小翼(相同尺寸)的叶片振型频率的增幅大;添加尺寸较大小翼的叶片二阶振型频率更易超过尺寸较小小翼的叶片振型频率。
The purpose of this paper is to explore the influence rule of adding different trailing edge small winglet on the vibration frequency of vertical-axis wind turbine rotor. To test the wind turbine dynamically,digital frequency conversion technology was used to adjust the incoming wind speed,and fixed load was applied by adjustable programmable DC load box. Moreover,the rotor dynamic frequency signal of was indirectly collected through PULSE 21.0 vibration test system. By analyzing the experimental data,It is found that with the increase of wind speed,the first and second order vibration frequencies of blades adding same type of small winglet increase with the increase of small winglet size,and the increase of blade mode frequencies adding fan-shaped small winglet is larger than that of the blade adding streamlined small winglet(with the same size). In addition,with the increase of wind speed,the second-order mode frequency of blades with larger winglet size is more easily bigger than that the second-order mode frequency of blades with smaller winglet size.
作者
陈涛
陈永艳
高志鹰
郭少真
汪建文
Chen Tao;Chen Yongyan;Gao Zhiying;Guo Shaozhen;Wang Jianwen(School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Key Laboratory of Wind Energy and Solar Energy Technology,Ministry of Education,Hohhot 010051,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第10期317-322,共6页
Acta Energiae Solaris Sinica
基金
内蒙古自治区自然科学基金(2018MS05048)。
关键词
风力机
模态分析
振动频率
垂直轴风轮
小翼
风洞
wind turbines
modal analysis
vibrational frequencies
WAWT
small winglet
wind tunnels
