椭圆管外液膜流动的数值模拟及传热实验研究Ⅱ:实验研究  

Numerical Simulation and Experimental Studies on Falling Film Outside Elliptical Tube(Ⅱ):Experimental Study

作　　者：齐春华[1,2] 冯厚军[1,2] 邢玉雷[1,2] 赵河立[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5期43-47,69,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：在椭圆管外液膜流动数值模拟的基础上,对椭圆管外的液膜厚度和传热性能进行了实验研究。研究结果表明:椭圆管外液膜厚度的模拟计算与实验结果基本吻合,误差约8%,可见数值模拟方法正确;长短轴比为1.5的椭圆传热管的传热系数比圆管提高20%～22%,可见椭圆管型强化传热明显。Based on the previous reported numerical simulation on falling film flow outside elliptical tubes, experimental study was conducted on the liquid film thickness outside elliptical tube and the heat transfer of falling film evaporation. The results showed that the liquid film thickness of numerical simula- tion basically reflected the experimental data with about 8% deviation range, so the numerical simulation was approved to be correct. The heat transfer coefficient of elliptical tube with long to short axis ratio of 1.5 is higher 20%--22% than that of the round tube, so elliptical tube can enhance heat transfer obviously.

关 键 词：椭圆管 降膜蒸发 传热实验 

分 类 号：TQ021[化学工程]