并列双圆球数值模拟  

Numerical simulation for flow-past two spheres in up and down arrangement

作　　者：韩守磊[1] 曾卓雄[1] 徐义华[1] 史卫成[1] 

机构地区：[1]南昌航空大学,江西南昌330063

出　　处：《南昌航空大学学报（自然科学版）》2007年第4期29-34,共6页Journal of Nanchang Hangkong University(Natural Sciences)

摘　　要：为了研究不同间距下并列双圆球的相互作用以及对尾涡和湍动能的影响，本文选取在L=2.0-4.0D之间的五个间距进行了数值模拟，计算均在Rep≈1000的条件下进行。结果表明：在流向上，双圆球彼此相互抑制其背风面流体的流向输运，在垂直流向的周向上，并列双圆球彼此增强背风面流体的周向输动。当圆球间距L≥3.0D时出现二次涡。湍动能的增量与圆球间距近似成二次方规律。In order to study the interaction between two spheres and the effect of different space on wake and turbulent kinetic energy, numerical simulations on five cases between L = 2.0D and 4.0D were performed by Computational Fluid Dynamics at Rep ≈ 1000. Numerical simulation showed that streamwise transport sphere is reciprocally restrained by two spheres. Spanwise transport of sphere is reciprocally augmented by two spheres. It was observed that the second vortex occurred at the distance ratio of L≥3.0D. The magnitude of turbulence enhancement decreases with the increase of sphere distance roughly in a square law way.

关 键 词：圆球 回流涡 数值模拟 湍动能 

分 类 号：O35[理学—流体力学]