CAS-W1-450大厚度钝尾缘翼型气动性能数值模拟研究  

Computational Aerodynamic Investigation of a Very Thick Wind Turbine Airfoil CAS-W1-450 With Blunt Trailing Edge

作　　者：李雪 李爽 许瑾 张磊[1,2,3,4] 杨科 LI Xue;LI Shuang;XU Jin;ZHANG Lei;YANG Ke(Institute of Engincering Thermophysics,ChineseAcademy of Sciences,Beijing 100190,China;University of Chinese Acadermy of Sciences,Beijing 100049,China;Key Laboratory of Wind Energy Utilization,Chinese Academy of Sciences,Beijing 100190,China;National Research and Development Center of Wind Turbine Blade,Beijing 100190,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049 [3]中国科学院风能利用重点实验室,北京100190 [4]国家能源风电叶片研发(实验)中心,北京100190

出　　处：《工程热物理学报》2020年第9期2154-2161,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51776204);中国科学院战略性先导科技专项资助(No.XDA21050303)。

摘　　要：风电叶片叶根附近的翼型对发电量的贡献随着机组的大型化越来越重要,促使了大厚度翼型的发展。为了探索大厚度翼型的数值模拟方法,本文模拟了CAS-W1-450翼型在实验状态下的流动特征。结果表明:在线性段,升力系数模拟值与实验值吻合良好,失速后,三维模拟结果优于二维结果;大攻角时,翼面不同展向位置的压力分布体现了流动分离的三维性,并且,尾缘附近的脱落涡使流动呈现非定常性,随着攻角的增加,升力系数变化幅值增加,频率降低。With the development of large-scale wind turbines,airfoils used in the inboard section of a blade play an increasingly important role in power generation,contributing to the development of thick airfoils.In order to investigate the numerical simulation method of large-thickness airfoil,this paper studies the CAS-W1-450 airfoil,and simulates the airfoil under the experimental condition.The results indicate that the calculated lift coeficients agree well with the experimental data in linear region,3 D simulation predicts better results than 2 D simulation after stall.Pressure distributions of the airfoil at different spanwise positions reflect a three-dimensional characteristic of flow separation.Furthermore,the flow exhibits unsteady characteristics at high angles of attack due to the shedding vortices in the wake.With the increase of angle of attack,the fluctuation amplitude of lift coefficient curve becomes more significant while the fluctuation frequency decreases.

关 键 词：翼型 气动性能 压力分布 非定常 数值模拟 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]