大型风力机叶片腹板偏置对弯扭耦合特性研究  

STUDY ON BEND-TWIST COUPLING CHARACTERISTICS OF WEB OFFSET FOR LARGE WIND TURBINE BLADES

作　　者：王海生 缪维跑 李春[1,2] 张立 闫阳天[1] 李志昊 岳敏楠 WANG HaiSheng;MIAO WeiPao;LI Chun;ZHANG Li;YAN YangTian;LI ZhiHao;YUE MinNan(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,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 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《机械强度》2023年第4期887-893,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51976131,52006148,52106262);上海市地方院校能力建设项目(19060502200)资助。

摘　　要：为研究大型风力机叶片内部腹板结构偏转对叶片弯扭耦合特性的影响,基于NX二次开发建立NREL 5 MW叶片CAD模型,通过计算流体力学(Computational Fluid Dynamics,CFD)方法求解叶片表面的分布载荷,采用节点位移法求解叶片弯曲角及扭转角,分析腹板偏置对叶片弯扭耦合效应的影响。结果表明,偏置腹板可使叶片产生自适应特性;在气动载荷作用下,弯曲角与扭转角均沿叶展逐渐增大,于叶尖达到幅值;正向偏置时,叶片扭转角与偏转幅度呈负相关,反向偏置与之相反;正偏置结构耦合叶片弯扭耦合系数随偏转角增大呈递减趋势,反偏置叶片均大于传统叶片。In order to research the influence of the web deflection on the bend-twist coupling characteristics of large wind turbine blades,the CAD model of NREL 5 MW blade is established based on NX secondary development,the aerodynamic loads of the blade are obtained by CFD method,the blade bendind angle and twisting angle are solved by the node displacement method to analyze the influence of web deflection for bend-twist coupling blade.The results show that the offset web helps to achieve the bend-twist coupling of blades.Under the action of aerodynamic load,the bending and twisting angle both increase along spanwise direction of blade gradually,and reach the magnitude at the tip of the blade;in forward bias,negative correlation between twist angle and offset,reverse bias is the opposite;positive bias blades bend-twist coupling coefficient is decreasing trend with the increase of deflection angle,reverse bias blade are greater than the conventional blade.

关 键 词：风力机叶片 弯扭耦合特性 复合材料 结构耦合 节点位移法 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]