论文部分内容阅读
本文用随机涡旋方法(RVM)研究了带一台阶的二维管道不可压缩湍流。研究了在流场中的方向区域——分离剪切层,再附面区及随后重建的边界层中湍流的大尺度涡旋的表现。对涡旋的不定常运动及其累积效应作了数值模拟。并研究了台阶高度和初始边界层对流场的影响。与实验结果吻合良好。
In this paper, a two-dimensional pipeline incompressible turbulence with a step is studied by a random vortex method (RVM). The behavior of turbulent large-scale vortices in the direction of the flow field-the detachment-shear layer, the re-attachment zone, and the subsequently reconstructed boundary layer is studied. The unsteady vortex motion and its cumulative effect are numerically simulated. The influence of the step height and the initial boundary layer on the flow field is also studied. Good agreement with the experimental results.