水平管内相积存造成深冷混合工质变浓度分析  

ANALYSIS ON THE COMPOSITION SHIFT FOR LOW-TEMPERATURE MIXED-REFRIGERANT CAUSED BY PHASE HOLDUP IN A HORIZONTAL PIPE

作　　者：公茂琼[1] 

机构地区：[1]中国科学院理化技术研究所,北京100080

出　　处：《工程热物理学报》2006年第z1期45-48,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50206024)

摘　　要：因多相流动中汽液速度差而造成相积存(Holdup)是深冷混合工质节流制冷系统中混合物浓度偏析的一个重要因素。本文建立了因相积存造成浓度变化的计算模型,在随管长存在分布热负荷(受热或冷却)情况下,考查了水平直管内深冷多元混合物因汽液相积存造成的循环浓度偏析情况。The phase holdup caused by the velocity difference in the two-phase flow is one of the most important reasons for the composition shift of multicomponent mixtures.A model for calculating the composition shift was developed in this paper.With this model,the composition shift was analyzed at a distributed heat loads along the pipe.The influences of temperature and pressure on the composition shift were also disclosed.

关 键 词：深冷混合工质 变浓度 相积存(Holdup) 

分 类 号：TK123[动力工程及工程热物理—工程热物理]