叶尖小翼对风轮结构动态性能的影响研究  

The Influences of Structural Dynamic Characteristics of Wind Turbine with Tip Vane

作　　者：汪建文[1,2] 闫建校[1] 刘博[1,3] 赵志渊[1] 

机构地区：[1]内蒙古工业大学能动学院,呼和浩特010051 [2]风能太阳能利用技术教育部省部共建重点实验室,呼和浩特010051 [3]中国农业机械化科学研究院呼和浩特分院,呼和浩特010010

出　　处：《内蒙古工业大学学报（自然科学版）》2011年第3期323-327,共5页Journal of Inner Mongolia University of Technology：Natural Science Edition

基　　金：国家自然科学基金项目资助(50976047);博士点基金项目资助(2091514110001)

摘　　要：风力机叶片叶尖增加小翼,在一定范围内可以提高风轮的输出功率,提高功率系数,但是小翼引起了风轮结构动态性能的改变。本文采用试验模态分析的方法研究了叶尖小翼对静止风轮结构动态特性的影响,采用谱分析法分析了加速度传感器测得的风力机机头振动谱,得到风轮的动频,应用动频曲线研究了叶尖小翼对风轮动频的影响。实验表明,叶尖小翼虽然降低了风轮静频但通过增大离心力和气动力提高了动频。叶尖小翼明显改变了动频曲线的走向,可以通过叶尖小翼改善旋转风轮的结构动态特性。Adding a tip vane to the blade of horizontal axis wind turbine（HAWT）,it can improve the power output of the generator in some scales,and increase power coefficient.The paper performs experimental modal analysis in studying the influences of structural dynamic characteristics of static wind turbine with tip vane.Through measuring and analyzing the vibration spectrum of rotating wind turbine,the paper obtains its natural frequency in different rotate speed,and builds the dynamic frequency curve to study the influence of tip vane to the rotors.The experiment result shows that tip vane decreases the static frequency of wind turbine but increases the dynamic frequency through the centrifugal and pneumatic effects.Tip vane changes the trend of dynamic frequency curve.It can improve the structural dynamic characteristics of wind turbine by tip vane.

关 键 词：风力机 叶尖小翼 结构动态特性 动频 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]