应用于气动弹性剪裁的大型风力机叶片弯扭耦合性能研究  

Research on Bend-Twist Coupling Properties of Twisted Composite Blades for Large Wind Turbines Based on Aeroelastic Tailoring

作　　者：刘宇航 王渊博[1] 李春[1] 孙瑞[1] 郝文星[1] LIU Yuhang;WANG Yuanbo;LI Chun;SUN Rui;HAO Wenxing(School of Energy and Power Engineering,University of Shanghai for Science and Technology, Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《动力工程学报》2018年第12期1016-1021,共6页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51676131;51176129)

摘　　要：为设计具有优良弯扭耦合性能的风力机叶片,基于复合材料铺层实现叶片气动弹性剪裁,建立全尺寸三维5MW风力机叶片有限元壳模型,通过CFD方法加载叶片表面气动载荷,采用节点位移法分析铺层结构对弯扭耦合叶片整体性能的影响。结果表明:镜像对称铺层结构可实现叶片弯扭耦合;在气动载荷作用下,叶片出现弯曲和扭转变形,沿叶片展向弯扭耦合变形量增加,且与截面相对位置呈非线性关系;随着蒙皮偏轴夹角的增大,弯扭耦合系数先增大后减小,叶片弯扭耦合性能随蒙皮偏轴夹角的变化而改变,存在最优解。To obtain excellent bend-twist coupling properties of wind turbine blades,a three-dimensional finite element shell model was established for the blade of a 5 MW wind turbine based on aeroelastic tailoring by ply stacking of composite laminates.The CFD method was used to analyze the aerodynamic load on the blade surface,and the effect of ply structure on the overall performance of related twisted blades was analyzed by the node displacement method.Results show that the symmetrical ply structure helps to achieve the bend-twist coupling of blades.Under the action of aerodynamic load,both the bend deformation and twist deformation appear,and the bend-twist coupling deformation increases along spanwise direction of blades,which is nonlinearly related to the position of cross sections.The bend-twist coupling coefficient increases firstly and then decreases with growing offset angle of blade skin,i.e.the bend-twist coupling performance varies with the offset angle,and there exists an optimal solution.

关 键 词：风力机叶片 铺层 弯扭耦合 弹性剪裁 复合材料 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]