大型风力机预弯预扭叶片气动性能研究  

Research on the Aerodynamic Performance of Pre-bent and Pre-twisted Blades of Large Wind Turbines

作　　者：陈威 姚叶宸 刘风云 黄典贵[1] CHEN Wei;YAO Yechen;LIU Fengyun;HUANG Diangui(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：《工程热物理学报》2024年第6期1713-1721,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52036005)。

摘　　要：为解决目前大型风力机叶片在大功率的气动载荷条件下,易产生叶片形变而导致风力机运行效率降低的问题,提出一种预弯预扭的叶片设计思想。本文对NREL 5 MW风力机叶片进行三维流场模拟和单向流固耦合,研究叶片在不同工况下的气动性能与形变情况,并基于叶片在额定工况下的形变量对其进行预弯预扭设计,通过不断的迭代得到叶片最佳预变形参数,使得最终叶片在额定工况的气动载荷作用下弹性变形后的几何形状与原始设计的几何形状一致。结果表明,预弯预扭后的5 MW风力机叶片能够有效消除气动载荷引起的叶片弯曲扭转所导致风力机效率降低的问题,风能利用率提升2%。In order to solve the problem that the blades of large wind turbine are easy to deform under the condition of high-power aerodynamic load,which leads to the decrease of wind turbine operation efficiency,a pre-bent and pre-twisted blades design idea is proposed.In this paper,three-dimensional flow field simulation and one-way fluid-solid coupling of NREL 5 MW wind turbine blades are carried out to study the aerodynamic performance and deformation of the blades under different working conditions.Based on the deformation of the blades under rated working conditions,the pre-bending and pre-torsion is carried out.The optimal pre-deformation parameters of the blades are obtained through continuous iteration,so that the geometric shape of the final blades after elastic deformation under the aerodynamic load of the rated working conditions is consistent with the original design.The results show that the pre-bent and pre-twisted 5 MW wind turbine blades can effectively eliminate the problem of wind turbine eficiency reduction caused by blades bending and torsion caused by aerodynamic load,and the wind energy utilization rate is increased by 2%.

关 键 词：风力机叶片 流场模拟 气动性能 单向流固耦合 预弯预扭 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]