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介绍了开源计算流体力学软件OpenFOAM(Open Field Operation and Manip-ulation)及面向对象编程技术,并利用其对三维斜掠后台阶流动进行了数值模拟.通过对无斜掠角度情况下用OpenFOAM计算得到的流场速度型和展向涡强度场分布与实验数据的对比研究,证明其具有良好的计算精度和可靠性.通过对不同斜掠角度台阶下游流线与压力分布的详细研究发现随着斜掠角度从0°增加到60,°回流区涡团结构和再附距离均发生了显著变化.其总体趋势是再附距离在30°后会急剧缩小,旋涡强度也会减弱.
OpenFOAM (Open Field Operation and Manipulation) and object-oriented programming (OPF) software are introduced, and the numerical simulation of three-dimensional ramping flow is carried out by using OpenFOAM. And the comparison between the experimental data and the experimental data shows that the method has good calculation accuracy and reliability.By detailed study of the flow line and pressure distribution in the downstream of different rake angle steps, The swept angle increases from 0 ° to 60 °, and the vortex structure and reattachment distances in the reflow region all change significantly.The general trend is that the reattachment distance will decrease sharply after 30 ° and the vortex intensity will be weakened.