R134a卧式螺旋管内沸腾流型与阻力特性实验研究  

STUDY ON FLOW BOILING PATTERN AND PRESSURE DROP OF R134a IN HELICAL COILS

作　　者：邵莉[1] 韩吉田[1] 陈文文[1] 陈常念[1] 王美霞[1] 潘继红[1] 

机构地区：[1]山东大学能源与动力工程学院制冷与低温研究所

出　　处：《工程热物理学报》2010年第6期1045-1048,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50776055);山东自然科学基金资助项目(No.Y2007F10)

摘　　要：在蒸发温度为5—15℃，热流密度范围为5～20kW·m^-2，工质质量流速变化范围为50～500kg·m^-2·s^-1和干度范围为0．01-0．9的条件下，对R134a在卧式螺旋管内的流动沸腾流型及阻力特性进行了实验研究。利用可视化技术对R134a在卧式螺旋管内的流动沸腾流型进行了观察分析，发现了两种新流型，对卧式螺旋管的上升段和下降段分别建立了流型图。获得了阻力特性的基础数据，通过对实验数据回归分析，发展了摩擦阻力系数计算关联式。This paper presents an experimental investigation on flow boiling pattern and presser drop of R134a in helical coils. The experiinental were carried out at saturation temperature from 5 to 15℃, with the refrigerant mass flux varying from 50 to 500 kg·m^-2·s^-1, heat flux varying from 5 to 20 kW·m^-2, and the vapor quality ranging from 0.01 to 0.9. The flow patterns are obtained through visualization experiment, two new flow patterns, which are tentatively named the ＂wave annular flow＂ and ＂super slug flow ＂, are observed, and two different flow pattern figures are proposed for the rising and declining sections, respectively. The flow frictional pressure drops are experimentally determined and the new correlation is developed for predicting the flow frictional factors through the regression analysis on the test data.

关 键 词：流动沸腾 流型 流动阻力 卧式螺旋管 R134A 

分 类 号：TK121[动力工程及工程热物理—工程热物理]