摘要
利用PULSE19装置和TR-PIV装置构建了发电机、塔架加速度与风轮尾迹发展的同步监测系统,针对直径1.4 m的小型水平轴风力机振动特性及叶尖附近湍流涡旋进行了测试与分析,证实了风轮振动与尾流发展之间存在密切关联性。由风轮旋转形成的一次谐波能量值最高。对比加速度与尾流的频谱图,发现加速度峰值与尾流能量峰值对应的特征频率相近,风轮振动的能量传递到了流场中。风力机发生偏航后,风轮旋转三倍频与尾流一次谐波间能量传递受阻,偏航角小于10°时,尾流能量值对振动加速度值的变化较敏感,而随着偏航角的增加,两者之间的关联性减小。
A synchronous monitoring system for vibration acceleration of a wind driven generator,hat of its pylon,and a wind wheel wake was constructed using the devices of PULSE19 and TR-PIV.The vibration features and turbulent vortex near blade tip of a 1.4 m-diameter horizontal axis wind turbine were measured and analyzed,it was shown that there is a close relation between wind wheel vibration and wake; the energy of the first harmonic vibration component caused due to the wind wheel rotating is the highest.Comparing frequency spectra of wind wheel＇s vibration acceleration and wake,it was found that the characteristic frequency of acceleration peak and that of wake energy peak are very close,so the wind wheel vibration energy is transmitted into the flow field; after the wind turbine has a yaw,the energy transfer between the third harmonic vibration component due to wind wheel rotating and the first harmonic component of the wake is blocked; when yaw angle is less than 10,the wake energy value is more sensitive to the change of wind wheel vibration acceleration; with increase in yaw angle,the relevance between them decreases.
作者
李佩林
马剑龙
汪建文
张彦奇
姜勇
吕文春
LI Peilin;MA Jianlong;WANG Jianwen;ZHANG Yanqi;JIANG Yong;LU Wenchun(School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;MOE Key Lab of Wind Energy and Solar Energy Technology, Inner Mongolia University of Technology, Hohhot 010051, China;Meehatronies Engineering Department, Inner Mongolia Technical College of Mechanics and Eleetries,Hohhot 010070, China)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第13期117-122,共6页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51466012)
风能太阳能利用技术教育部重点实验室开放基金资助项目(201604)
内蒙古自治区自然科学基金资助项目(2016MS0509)
内蒙古自治区研究生科研创新资助项目(S20161012802)
内蒙古工业大学大学生创新实验计划项目(2016029)
关键词
尾迹
振动加速度
偏航
频谱响应
wake
vibration acceleration
yaw
spectral response
