摘要
文章针对某分布式水平轴风力机,提出采用翼型凹变的方式对叶片翼型吸力面进行优化。借助B&K公司的Pulse16.1结构振动分析系统,对翼型凹变叶片和原翼型叶片进行模态和动频测试。研究表明:翼型凹变后叶片刚度约有4%的提升;在相同工况下,翼型凹变后的加速度幅值普遍低于原翼型,减振效果明显;翼型凹变对轴向窜动影响最为明显,减振效果达到30%左右。相关研究成果可为风力机在远短于设计寿命期内频繁发生疲劳损伤或断裂提供新的解决途径。
The suction surface of blade airfoil is optimized by means of concave change of airfoil for a distributed horizontal axis wind turbine. The modal and dynamic frequency measurements of concave and original airfoil blades were carried out by means of Pulse 16.1 structural vibration analysis system of B&K Company. The research reveals that the stiffness of blade increases by 4%after concave change of airfoil;the acceleration amplitude after concave change of airfoil is generally lower than that of original airfoil under the same working condition. The concave change of airfoil has the most obvious effect on the axial channeling,and the effect of vibration reduction is about 30%. Relevant research results can provide a new way to solve the frequent fatigue damage or fracture of wind turbines far short of their design life.
作者
马剑龙
段亚范
吕文春
霍德豪
汪建文
Ma Jianlong;Duan Yafan;Lv Wenchun;Huo Dehao;Wang Jianwen(School of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Scientific Research and Vocational Education Research Center,Inner Mongolia Technical College of Mechanics Electrics,Hohhot 010070,China)
出处
《可再生能源》
CAS
北大核心
2019年第5期755-761,共7页
Renewable Energy Resources
基金
内蒙古自治区高等学校青年科技英才支持计划(NJYT-17-B24)
内蒙古自治区高等学校科学研究项目(NJZY18271
19270)
内蒙古机电职业技术学院自然科学研究项目(NJDZJZR1802
1805)
关键词
叶片
翼型凹变
刚度
振动频率
blade
airfoil concave
stiffness
vibration frequency
