论文部分内容阅读
求解不可压流体耦合方程的直接解法（ＣＥＬＳ算法）在许多计算问题中体现了其优越性．多重网格法在加速数值计算的收敛速度方面也表现出了其有效性．作者将ＣＥＬＳ算法在多重网格下实施，对控制方程采用指数格式和虚拟时间步法进行离散，用原始变量对外掠后台阶的层流流动进行了数值计算．结果显示，外掠后台阶层流流动中，主涡、主涡下游的底部二次涡和上部二次涡开始出现的Ｒｅ数和位置均与Ａｒｍａｌｙ等人的实验数据符合良好．表明这种结合是很有效的．
The direct solution to the incompressible fluid coupling equation (CELS algorithm) shows its superiority in many computational problems. Multi-grid method also shows its effectiveness in accelerating the convergence of numerical calculation. The authors implemented the CELS algorithm on multiple grids, discretized the governing equation in exponential format and virtual time step, and used the original variables to calculate the laminar flow in the outer swept step. The results show that the Re v numbers and positions of the bottom vortex and the upper secondary vortex downstream of the main vortex and the main vortex are in good agreement with the experimental data of Armaly et al. Show that this combination is very effective.