大型风力机叶片颤振边界的预测分析  

Prediction and Analysis of Blade Flutter Boundary of Large Wind Turbine

作　　者：戴丽萍[1] 白雪峰[1] 王晓东[1] 叶昭良 DAI Liping;BAI Xuefeng;WANG Xiaodong;YE Zhaoliang(Key Laboratory of CMCPPE Ministry of Education,North China Electric Power University,Beijing 102206,China;China Huaneng Group Clean Energy Technology Research Institute Co.,Ltd,Beijing 102209,China)

机构地区：[1]华北电力大学电站能量传递转化与系统教育部重点实验室,北京102206 [2]中国华能集团清洁能源技术研究院有限公司,北京102209

出　　处：《工程热物理学报》2022年第9期2357-2362,共6页Journal of Engineering Thermophysics

基　　金：自然科学基金项目(No.51906067,No.51876063);华能集团总部科技项目海上风电与智慧能源系统科技专项(一期)(No.HNKJ20-H88)。

摘　　要：随着风力机叶片长度和柔性的增加,颤振临界转速和额定转速的比值(颤振裕度)越来越接近与1,颤振成为风力机中安全设计中需要重点考虑的关键问题之一。目前,关于风力机气弹特性研究的较多,而对颤振临界风速进行预测的研究还较少。本文基于动量叶素理论和非线性几何精确梁模型的FAST软件,对NREL 5 MW风力机在刹车和运转时的颤振临界风速进行了预测,对颤振前、后的结构动态响应及气动性能参数进行了分析。在此基础上,计算并比较了质心位置、扭转刚度和结构阻尼等因素对颤振风速的影响。结果表明:当质心位置前移扭以及扭转刚度、结构阻尼、桨距角增大时,颤振风速增大,反之则减少。With the increasing of wind turbine blade length and flexibility, the ratio of critical clutter rotor rotation speed and rated rotational speed is getting closer to 1, and clutter is becoming one of the major concerns in wind turbine design. Now the study on the aero-elastic characters of wind turbine has been widely performed,however due to some uncertainty of physical factors the prediction of critical clutter wind speed or rotational speed has little been investigated. In this paper, the critical wind speed for stationary and moving wind turbine blade are predicted based on the software FAST, and the performance of aerodynamic parameters and structural response are analyze as well. Besides, the effects of mass center position,torsional stiffness, structural damping etal on critical clutter speed are analyzed. The results show that the backward moving of mass center,the increasing of torsional stiffness, structural damping and pitch angle will enhance the critical flutter speed.

关 键 词：风力机 经典颤振 颤振风速 FAST 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]