正型排布四圆柱绕流流动模式的格子Boltzmann模拟  

Lattice Boltzmann Simulation for Flow Pattern of Flow around Four Cylinders in Square Arrangement

作　　者：杨佼[1,2] 武文斐[1] 龚志军[1] 李保卫 

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,包头014010 [2]山西新唐工程设计有限公司,太原030000

出　　处：《科学技术与工程》2013年第19期5427-5430,5435,共5页Science Technology and Engineering

基　　金：国家自然基金项目(51166010);内蒙古自然基金(2012MS0712)项目资助

摘　　要：利用格子Boltzmann数值方法模拟了绕正型排布的四个圆柱的二维层流流动,研究了雷诺数Re=70时,16种不同圆柱节距比下的流动模式,提出了无因次数α,β对流动模式进行分类,α为上游圆柱与下游圆柱的关联程度,β为尾涡形态的关联程度。结果表明α主要受横向节距比的影响,当α<0.4时为稳定屏蔽流,当0.4≤α<1.0时为摆动屏蔽流,当α≥1.0时为涡脱落流态;而β主要受纵向节距比的影响,当β<0.26时为单体模式,当0.26≤β<1.0时为干扰模式,当β≥1.0时为涡分离模式。本研究为多柱绕流流态的定量划分进行了探索。The Lattice Boltzmann Method was used to simulate laminar flow around four circular cylinders in square arrangement. The flow patterns under different 16 kinds of cylinder pitches were researched when the Reyn- olds number is 70. Dimensionless number a and β were put forward to classify the flow pattern, a is the correlation degree between the upstream cylinders and downstream cylinders, and β is the wake pattern. Results indicate that α is mainly affected by the horizontal pitch, α 〈 0. 4 is for stable shielding flow pattern, 0. 4≤α〈 1.0 is for wigg-ling shielding flow pattern, and a≥1.0 is for vortex shedding flow pattern; inversely,/3 is mainly affected by the vertical pitch,β〈0.26 is for single bluff body flow pattern, 0.26≤β〈1.0 is for interference flow pattern, and β≥1.0 is for vortex separating flow pattern.

关 键 词：格子BOLTZMANN方法 圆柱绕流 正型排布 流动模式 

分 类 号：O351.3[理学—流体力学]