摘要
基于FLUENT软件平台上的三维大涡模拟方法,对定常来流流场中的单圆柱及不同排列形式的双圆柱进行了水动力计算,并对圆柱周围的瞬时流场、时均流场以及圆柱受力进行了分析。分析结果表明,当Re=6×104时,串列双圆柱中上游圆柱受力明显大于下游圆柱,下游圆柱Cd、Cl的变化频率满足fd=2fl,两圆柱的脱涡频率近似相等,涡街的相位相同;并列双圆柱的Cd基本相等,且变化趋势有一定相似性,脱涡频率均接近单个圆柱,涡街的相位相反;交错45°排列的两个圆柱Cd基本相等,脱涡频率接近,下游圆柱的涡街相位明显滞后于上游圆柱。
Based on the LES method of FLUENT, flow around one and two ciecular cylinders arranged different was carried out, the instantaneous and time averaged flow field and the force on circular cylinders ware analyzed. When the Reynolds number equals to 6×104, for the two circular cylinders arranged tandem, the pressure on cylinder upstream is obviously larger than the cylinder downstream, its frequency of the drag force coefficient is twice of the lift force coefficient, and their frequencies of eddy shedding are...
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2008年第6期625-632,共8页
Chinese Journal of Hydrodynamics
基金
上海市重点学科建设项目(B206)
国家自然科学基金(10572093)资助项目
关键词
大涡模拟
亚格子模式
圆柱绕流
large eddy simulation
sub grid-scale model
flow around cylinders
