摘要
浑水水力分离清水装置是在动态条件下利用水流自身的能量,从高含沙浓度的浑水中将水沙(包括极细沙和黏粒)分离,获取可供人们生活用的透明清水的取水装置。由于装置内部结构复杂,仅通过物理模型实验无法了解"装置"内部完整的流场特性。采用k-εRNG湍流模型和SMPLEC算法对"装置"内部三维速度场进行了数值模拟。根据计算结果详细分析了"装置"内径向、轴向以及切向速度分布特征,及其对"装置"内泥沙运动轨迹和水沙分离效率的影响。从清水流场特性出发,初步探讨了"装置"有效分离水沙并获得清水的机理,并为"装置"结构进一步优化提供参考。
The turbid water hydraulic separation device （depicted in Fig. 1 ） is a new type of water-sediment separator and is able to separate sediment （including fine sand and clay grain）and extract clear water from turbid water of high sediment concentration. Due to complex structure of the device including three partition boards at different positions, it is not possible that the experimental method is applied to measure the flow field for whole the device. The flow field and the turbulent flow characteristics are predicted by thek-ε RNG model and SIMPLE calculation method. According to the computational results, the characteristics of radial, tangential and axial, velocity and the influence of them on sediment movement and separation efficiency are analyzed in detail. Meanwhile, on the basis of clear water flow field characteristics, the mechanisms of water-sediment separation and extraction clear water with the device are preliminarily discussed in this paper, which also can give a reference to structure optimization of the device.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2007年第4期520-528,共9页
Chinese Journal of Hydrodynamics
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
关键词
浑水水力分离清水装置
水沙分离
k-εRNG模型
速度分布
流场特性
hydraulic turbid water separation device
water-sediment separation
k-ε RNG model
velocity rule
flow field characteristics
