浑水水力分离清水装置内水沙两相弱旋流场数值模拟  

Two-Phase Water-Sediment Weak Swirl Flow Simulation in Turbid Water Hydraulic Separator

作　　者：李琳[1] 邱秀云[1] 龚守远[2] 赵涛[1] 牧振伟[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆农业大学农学院,乌鲁木齐830052

出　　处：《中国农村水利水电》2008年第1期11-15,19,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金重点项目(50469003);新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2004121)联合资助

摘　　要：采用RNG(重整化群)两方程紊流模型和简化的多相流Mixture(混合)模型,对浑水水力分离清水装置内水沙两相三维弱旋流场进行了数值模拟。根据计算结果,详细比较和分析了加沙前后装置内径向、轴向以及切向速度分布特征,及其对"装置"内泥沙运动和水沙分离效率的影响。从水沙两相流场特性出发,初步探讨了"装置"有效分离水沙并获得清水的机理,为设计优化装置结构提供理论基础。In this paper, the improved RNG two-equation turbulent model and the simplified multiphase mixture model are used to simulate the two-phase water-sediment flow field with weak swirl of a turbid water hydraulic separator. According to the computational results, the characteristics of radial, tangential and axial velocity of clean water and sediment-entrained water field, and the influence of them on sediment movement and separation efficiency are all analyzed in detail in this paper. Meanwhile, on the basis of two-phase flow field characteristics, the mechanisms of water-sediment separation and clean water extraction with the device are preliminarily discussed in this paper, which also can be referenced for structure optimization of the device.

关 键 词：水沙分离 RNGk-ε模型 Mixture模型 弱旋流场 分离机理 

分 类 号：TV134.9[水利工程—水力学及河流动力学]