气-液两相并流下行通过孔口的流型及预测  

Flow Pattern and Transition Prediction of Gas and Liquid Concurrent Downward Flow through an Orifice

作　　者：谯敏 仇子铖[1] 黄卫星[2] 张妍[1] Qiao Min;Qiu Zicheng;Huang Weixing;Zhang Yan(CNNC Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology,Nuclear Power Institute of China,Chengdu,610213,China;School of Chemical Engineering,Sichuan University,Chengdu,610065,China)

机构地区：[1]中国核动力研究设计院中核核反应堆热工水力技术重点实验室,成都610213 [2]四川大学化学工程学院,成都610065

出　　处：《核动力工程》2021年第S01期21-25,共5页Nuclear Power Engineering

摘　　要：针对气-液两相并流向下通过筛板孔口的接触模式,以建立液相分散条件为目标,分别以空气-水、空气-甘油水溶液为体系,在不同孔口结构下,对气-液两相并流向下通过孔口的流动进行实验,考察了气-液流量、孔径、板厚以及液相运动粘度对分散流产生的影响。结果表明:气-液流量越大、孔径越小、相对板厚越小、液相运动粘度越大均会使分散流越容易产生;基于分析结果,建立了分散流转换边界预测关联式。这些流型图和预测公式均有助于预估气-液两相并流通过孔口的分散流起始点,对有气-液两相并流向下通过孔口的系统的操作与优化设计来说都具有非常重要的参考价值。Experiments were conducted with gas and liquid(water and glycerite)concurrent downward flow through different orifice plates.The effects of gas and liquid flowrates,hole diameter,plate thickness and the kinematic viscosity of the liquid on the transition of the dispersed flow were clarified.Experimental results show that:the gas flow rate of the dispersed flow transition decreases with the increasing of liquid flow rate;with the decreasing of hole diameter,plate thickness,or the increasing of liquid kinematic viscosity,the dispersed flow is more prone to occur.Finally,based on the experimental results,a correlation was proposed to predict the onset of the dispersed flow.These flow patterns and correlation are useful for the prediction of the onsite of the dispersed flow,and can provide valuable references for the operation and optimization design of the orifice plate system with gas and liquid concurrent downward flow through orifice.

关 键 词：气-液两相流 孔口 分散流型 流型图 预测关联式 

分 类 号：TL334[核科学技术—核技术及应用]