水平管内流动蒸发数值模拟及可视化研究  

NUMERICAL SIMULATION AND VISIBLE INVESTIGATION OF FLOW BOILING IN HORIZONTAL TUBES

作　　者：吴晓敏[1] 莫少嘉[1] 李辉[1] 吴越[1] 王维城[1] 

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京100084

出　　处：《工程热物理学报》2009年第2期312-314,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金重点基金资助项目(No．50736003)

摘　　要：为了研究管内流动蒸发的性能,利用FLUENT对外径为7 mm光管内的流动蒸发过程进行了数值模拟,同时对外径为7 mm的光管和微肋管内的蒸发过程进行了可视化实验。所用工质为R22,实验工况为:质量流速220 kg/(m^2s),7℃蒸发温度,15%～20%的入口干度,5～6℃的出口过热度,数值模拟和实验中均观测了流动蒸发中的旋流和脉冲喷射,分析了旋流及脉冲对换热等的影响。To investigate the performance of flow boiling in tubes, software FLUENT was used to simulate the flow boiling in a smooth tube having 7.0 mm outside diameter （OD）. At the same time, visible experiments were conducted for both smooth tubes and micro-fin tubes having 7.0 mm OD. The refrigerant used was R22. The tests were carried out at 220 kg/m^2s mass flux, 7℃ evaporation temperature, 15%-20% inlet vapor quality and 5-6℃ outlet superheat degree. In both the numerical simulation and visible experiment, there were swirling flow and flow pulse. The mechanism and the effects on the heat transfer were discussed.

关 键 词：光管 微肋管 流动蒸发 脉冲喷射 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]