冲刷坑冲刷过程的数值模拟  

Numerical Simulation of Scouring Process of Scour Hole

作　　者：李艳富[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,成都610065

出　　处：《科学技术与工程》2009年第5期1176-1180,共5页Science Technology and Engineering

基　　金：国家自然科学基金(50709020);国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50539060)资助

摘　　要：为了探索用数值模拟的方法来模拟冲刷坑形成过程及预测冲刷深度的可行性,在贴体非正交曲线坐标系中,采用控制体积法对二维散粒体河床的冲刷进行了数值模拟,根据冲刷过程中坑底动水压强和冲刷深度之间的平衡关系,来控制坑底边界网格移动进而模拟冲刷坑的冲刷过程及流场变化过程,实现了对冲坑底边界动态发展过程的自动模拟。计算得到的控制参数变化规律,表明用此方法模拟冲坑发展过程的可行性;计算结果与试验吻合较好,说明本方法可以有效地用来模拟冲坑发展过程,并能正确的反映挑流冲刷中流场结构和速度、压力等参数的变化。In order to know about the probability of numerical simulation of the forming process and prediction of scouring depth, a set of mathematical model is developed. According to the balance relationship between dynamic pressure and scouring depth, grids are controlled to simulate the scouring process of scour hole, and the responding flow field is also simulated. The change law of controlling parameters and the calculated results according with the experimental data show that the simulation method is reasonable to simulate the forming process, and can correctly reflect the variation of parameters such as velocity and pressure.

关 键 词：冲刷坑 冲刷过程 动边界 动网格 数值模拟 

分 类 号：TV131[水利工程—水力学及河流动力学]