椭圆管外液膜流动的数值模拟及传热实验研究Ⅰ:数值模拟研究  

Numerical Simulation and Experimental Studies on Falling Film Outside Elliptical Tube(Ⅰ):CFD Simulation

作　　者：齐春华[1,2] 徐克[1,2] 冯厚军[1,2] 吕庆春[1,2] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192 [2]国家海水利用工程技术研究中心,天津300192

出　　处：《化学工业与工程》2012年第4期74-79,共6页Chemical Industry and Engineering

基　　金：国家海洋局海洋公益科研专项项目(201205030);国家海洋局海洋公益科研专项项目(201205016)

摘　　要：针对水平椭圆管降膜蒸发海水淡化的技术特点,在流体力学和传热学理论分析基础上,运用自定义函数(UDF)对FLUENT软件进行二次开发,采用分布参数法建立数学模型,对椭圆管外液膜流动进行了三维数值模拟研究,并与圆管进行对比分析,得出椭圆管截面形状因子对液膜分布和流动形态的影响规律。模拟结果表明,E=1.5的椭圆管具有液膜薄,均匀性好的特点,管表面更易形成柱状流,当入口流速为0.8 m/s时,此椭圆管外液膜分布状态最好。In this paper,theoretical analysis and Computational Fluid Dynamics （CFD） study on falling film process of elliptical tubes for seawater desalination was conducted. And the results were also compared with that of the round pipes. A 3-D numerical simulation of falling film flow is made using FLUENT software which has been further exploited with user defined functions （UFD） ,the mathematical model was established by distributed-parameter method. The simulation results show that the effect of the sectional shapes of elliptical tubes on failing film flow is obviously, the E = 1.5 elliptical tube surface is relatively easy to form columnar flow, with the good uniformity characteristics of thin liquid film. When the inlet velocity is 0.8 m/s,the state of liquid distribution outside the elliptical tube is the best.

关 键 词：椭圆管 降膜流动 数值模拟 

分 类 号：TQ021[化学工程]