基于BEM与CFD数值模拟的风力机叶片气动性能分析  

Wind turbine blade aerodynamic performance analysis based on BEM and CFD numerical simulation

作　　者：史先路 赵凡[2] 赵凯 赵军华 Shi Xianlu;Zhao Fan;Zhao Kai;Zhao Junhua(College of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;China Aerodynamics Research and Development Center,Mianyang 621000,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]中国空气动力研究与发展中心,四川绵阳621000 [3]江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《可再生能源》2023年第12期1612-1618,共7页Renewable Energy Resources

基　　金：国家自然科学基金(12102145);江苏省自然科学基金(BK20210444);中央高校基本业务费(JUSRP121042)。

摘　　要：为阐明转子叶尖损失效应以及动态失速效应对风力机气动性能预测的影响,文章采用计算流体力学(CFD)以及叶素动量理论(BEM)两种方法分析预测了不同风场条件下的叶片气动性能,研究了三维旋转效应下叶片表面的非定常气动特性。结果表明:在离心力和科氏力作用下,叶片吸力面发生流动分离,随着风速的增加,失速区域逐渐增大;叶片翼型截面前缘吸力侧受风速影响较大;在非定常来流条件下,叶尖部位尤其是前缘对来流敏感程度较高。通过不同叶尖损失校正模型对叶片载荷的预测结果对比可以看出,针对BEM进行的叶根叶尖修正计算结果更接近于CFD模拟结果,但是,在叶根和叶尖部位仍存在一定偏差。In order to clarify the important influence of rotor tip loss effect and dynamic stall effect on the prediction of wind turbine aerodynamic performance,the present study carried out two methods,i.e.the computational fluid dynamics(CFD)and blade element momentum(BEM)theory,to analyze and predict the aerodynamic performance of blades under different wind fields.The unsteady aerodynamic characteristics of blade surface are studied for three-dimensional rotation situation.The results show that,under the action of the centrifugal force and Coriolis force,the flow separation occurs on the suction surface of blades.With the increasing wind speed,the stall area gradually increases.The suction side of the leading edge of the blade airfoil section is greatly affected by the wind speed.Under the condition of unsteady incoming flow,the blade tip,especially the leading edge,is sensitive to the incoming flow.By comparing the predictions of different tip loss correction models for the blade load,it is found that the blade root and tip correction made for the BEM is close to the CFD results,while the difference still exists to a certain extent.

关 键 词：风力机 非定常气动特性 分离流 BEM 叶根叶尖损失修正 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]