阶梯溢流坝水流特性数值模拟  

Numerical simulation of turbulent flow over stepped spillways

作　　者：胡晓清[1] 钱忠东[1] 槐文信[1] Antonio Amador 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]Hydraulic and Environmental Department, Technologic School of Barreiro, Barreiro 2830-144, Portugal

出　　处：《武汉大学学报（工学版）》2008年第4期20-23,共4页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:50609020);二滩水电开发有限责任公司雅砻江水电开发联合基金资助项目(编号:50539060)

摘　　要：采用Mixture模型对阶梯溢流坝气液两相湍流进行模拟,湍流模型分别采用Realizablek-ε模型和RNGk-ε模型.针对非掺气区域的坝面平均速度、边界层厚度沿水流方向的变化以及边界层内速度分布等,进行了水流特性分析,并将两种湍流模型的计算结果与实验结果进行了比较.结果表明,Realizablek-ε湍流模型能够更好地模拟出阶梯溢流坝的水流特性.The air-water two phase flow over the stepped spillway is simulated by using mixture multi- phase flow model. The Realizable/e-s turbulence model and the RNG k-ε turbulence model are chosen to enclose the controlling equations. The computational results by the two turbulence models are analyzed and compared with experimentaI ones in following aspects, mean velocity, the growth of the turbulent boundary layer thickness in the streamwise direction and the mean velocity profile normal to the pseudobottom. It is concluded from the comparison that the Realizable k-ε turbulence model is more efficient in simulating the characteristics of air-water flow over stepped spillways.

关 键 词：阶梯溢流坝 湍流模型 水流特性 数值模拟 

分 类 号：TV652.1[水利工程—水利水电工程]