宁静红;刘敬坤;刘圣春;诸凯;解海卫;
NING Jing-hong;LIU Jing-kun;LIU Sheng-chun;ZHU Kai;XIE Hai-wei;Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce;

• 1:天津商业大学天津市制冷技术重点实验室

摘要(Abstract)：

对水蒸汽在内径为8 mm的水平圆管内,不同管壁温度、蒸汽流速、压力和入口过热度下的冷凝过程,采用通用CFD软件Fluent 13.0中的Mixture模型,结合UDF编程对水平管内冷凝物理模型进行数值模拟。通过分析相应的冷凝液分布云图、体积分数和局部换热系数的变化曲线,得出蒸汽在水平管内冷凝换热系数与壁温、蒸汽流速、压力和入口过热度的变化规律。并将模拟结果与实验测试结果进行了对比,得出模拟结果比计算值偏高约30%。
By adopting the Mixture Model in CFD software Fluent 13. 0 combined with UDF procedure,the numerical simulation was carried out that water vapor condensates inside horizontal tubes which diameter is 8 mm,under different wall temperatures,vapor velocities,pressures and inlet superheats. By analyzing the condensation liquid contour,void fraction and local heat transfer coefficient at different points,the rules are obtained that the condensation heat transfer coefficient changes with the wall temperatures,vapor velocities,pressures and inlet superheats. The comparison is done between the simulation result and the experimental results and it shows that the simulation value is larger than the experimental one by 30%.

关键词(KeyWords)： 水蒸汽;水平圆管;冷凝;数值模拟
vapor;horizontal tubes;condensation;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51006073);; 国家863计划项目(2012AA053001)

作者(Authors): 宁静红;刘敬坤;刘圣春;诸凯;解海卫;
NING Jing-hong;LIU Jing-kun;LIU Sheng-chun;ZHU Kai;XIE Hai-wei;Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce;

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