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双向流固耦合的圆柱式桥墩绕流的三维数值模拟

DOI: 10.3969/j.issn.1674-0696.2013.05.06, PP. 926-929

Keywords: 圆柱绕流,双向流固耦合,三维数值模拟,雷诺数,阻力系数,升力系数,flowaroundacylinder,two-wayfluid-solidcoupling,three-dimensionalnumericalsimulation,Reynoldsnumber,dragcoefficient,liftcoefficient

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Abstract:

:?考虑双向流固耦合并利用软件ANSYSCFX模拟了圆柱表面涡脱的产生和变化过程,结合工程实际给出了计算实例,采用有限体积法对流体力学控制方程Navier-Stokes进行离散,用SIMPLE方法求解,分析计算了圆柱表面周向压力系数分布情况及圆柱的阻力系数、升力系数及Strouhal数,得到了流体与结构物相互作用对圆柱绕流特性的影响。结果表明:由于圆柱受到水流的作用,圆柱的升力及尾流特征显示周期性变化,并出现单一频率振动。

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