摘要
以NACA63(2)-215翼型为研究对象,在波谷处加微小圆柱,利用FLUENT中k-ε湍流模型和大涡模型进行流场数值模拟,分析其对气动性能的影响。工况为来流风速为8 m/s和出口压力为0 MPa。研究表明:波谷前加微小圆柱能使传统波浪翼型叶片升力系数提高,最高可提升13%左右,在大攻角失速区内也能使其阻力系数降低,在30°攻角附近可降低15%左右,从而优化了叶片整体气动性能;微小圆柱的存在使得其后方翼型截面流动分离推迟,稳定叶片表面气流流动,延缓叶片失速;波谷前加微小圆柱能增加传统波浪翼型叶片刚性,降低叶根处所受应力,使叶片不易磨损或折断。
The NACA63(2)-215 airfoil was used as the research object.The tiny cylinder was added to the front of the trough.The flow field numerical simulation was carried out by using the k-εturbulence model and the large eddy model in FLUENT to analyze its influence on the aerodynamic performance.The working condition is that the incoming wind speed is 8 m/s and the outlet pressure is 0 MPa.Studies have shown that the addition of tiny cylinder in front of the trough can increase the lift coefficient of traditional wavy airfoil blades by up to 13%,and also reduce the drag coefficient in the high angle of attack stall zone,which can be reduced by 15%for the angle of attack around 30°,thus optimizing the overall aerodynamic performance of the blade.The existence of the tiny cylinder delays the flow separation of the rear airfoil section,stabilizes the airflow of the blade surface,and delays the blade stall.Adding a tiny cylinder before the trough can increase the rigidity of the traditional wavy airfoil blade and reduce the stress in the blade root,so that the blade is not easy to wear or break.
作者
于静梅
高鸽
张辉
张世轩
YU Jing-mei;GAO Ge;ZHANG Hui;ZHANG Shi-xuan(School of Mechanical Engineering,Liaoning Technical University,Fuxin,China,Post Code:123000)
出处
《热能动力工程》
CAS
CSCD
北大核心
2019年第5期120-126,共7页
Journal of Engineering for Thermal Energy and Power
关键词
波浪翼型
微小圆柱
数值模拟
气动性能
失速
wave airfoil
tiny cylinder
numerical simulation
aerodynamic performance
stall
