平衡冲刷坑内水流结构的数值研究

Numerical investigations of flow structures within a equilibrium scour pool

本文利用大涡模拟方法，对三峡溢流坝下游平衡冲刷坑内的二维流场结构进行了数值模拟，探讨了射流在冲坑水垫中的扩散规律和流谱结构，分析了冲坑底流速和压力的沿程分布及坑底不同测点脉动压力的统计特征，并与试验结果进行了比较．在数值模拟中，采用了弱压缩流的控制方程，用贴体座标技术进行了网格生成．

y use of the large eddy simulation, numerical solutions of two dimensional submerged impinging jets within a equilibrium scour pool are obtained. The behaviors of turbulent diffusion and flow patterns for submerged impinging jets within a scour pool are investigated. The mean velocity profiles and statistical characteristics for fluctuation pressures at the bottom of the scour pool are analyzed. The results obtained are compared with the experimental values. A weakly compressible flow model and body fitted grids are used in this paper.