摘要
利用高频PIV系统采集水平轴风力机下游远至4.5倍风轮直径范围内的尾流数据。首先通过对涡量场云图分析发现叶尖涡"交互跳跃"现象;然后对比不同翼型、风速、尖速比下,1、2、3、4倍风轮直径处的平均涡量值发现:随着尖速比的增加,叶尖涡"交互跳跃"现象提前发生;随着风速的增加,叶尖涡"交互跳跃"现象推后发生;得出叶尖涡"交互跳跃"现象的出现是尾流速度开始恢复的标志。而NACA4415翼型叶片发生叶尖涡"交互跳跃"现象的时间比S翼型叶片推迟,所以NACA4415翼型叶片的尾流速度恢复比S翼型叶片推迟。
The wake data of 4.5 times of the wind wheel of the horizontal axis wind turbine were collected by utilizing the TR-PIV. The'leapfrogging phenomenon'of the tip vortex was discovered;Then by comparing the average vorticity value in 1,2,3,4 times the diameter of the wind wheel position under various airfoil,wind velocity and tip speed ratio,the founding is that with the increase of the tip speed ratio,The'leapfrogging phenomenon'of the tip vortex will take place in advance;With the increase of the wind velocity,The'leapfrogging phenomenon'of the tip vortex pushes back,and get the conclusion that the'leapfrogging phenomenon'of the tip vortex is the sign of the recovery of the wake velocity.The position that the'leapfrogging phenomenon'of the tip vortex of the airfoil of NACA4415 happens later than the airfoil of S,so the recovery of the wake velocity of the airfoil of NACA4415 is also later than the airfoil of S.
作者
东雪青
刘钊
汪建文
章书成
韩玉霞
Dong Xueqing;Liu Zhao;Wang Jianwen;Zhang Shucheng;Han Yuxia(School of Energy and Power Engineering,Inner Mongolia University of Technology,Huhhot 010051,China;Key Laboratory of Wind Energy and Solar Energy Technology Ministry of Education,Inner Mongolia University of Technology,Huhhot 010051,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第2期326-332,共7页
Acta Energiae Solaris Sinica
基金
内蒙古自治区自然科学基金(2015MS0508)
国家自然科学基金(51366010)
