矩形双通道间脉动的非单值性试验研究  

Nonlinear research of flow oscillation in double narrow rectangular channels

作　　者：李虹波[1] 黄彦平[1] 卢冬华[1] 王艳林[1] 

机构地区：[1]中国核动力研究设计院空泡物理和自然循环国家级重点实验室,四川成都610041

出　　处：《化学工程》2008年第9期36-39,共4页Chemical Engineering(China)

摘　　要：矩形平行通道流动不稳定性问题是影响紧凑装置安全运行的重要因素之一。文中在中国核动力研究设计院热工试验回路上进行了矩形双通道管间脉动试验。通过对各种热工水力参数和单通道加热的试验研究,得出结论:在低压低质量流速下,随着进口过冷度的增加,界限含汽质量分数先增加、后减小;随着系统压力的升高,质量流速脉动周期先变短、后变长;在低质量流速下,单通道加热时产生管间脉动的界限热流密度比双通道均匀加热情况下的高,在较高质量流速下,单通道加热时的界限热流密度比双通道均匀加热情况下的低。Flow instability in parallel rectangular channels is one of the important factors to affect the operating safety of the flat-plate-type fuel assembly cores. The experiment of flow oscillations in double narrow rectangular channels was carried out in the thermohydraulic loop. The results of experimental research of thermohydraulic parameters and one-channel heated on characteristics of flow oscillation in double narrow rectangular channels show that with the increasing of inlet subcooling, critical quality of oscillation increases in the first and then reduces under low pressure and flow velocity ; with the increasing of system pressure, the period of oscillation reduces in the first and then increases; when one-channel heated, the limit heat flux of oscillation is higher than that of doublechannel heated under low flow velocity, but it＇s lower than that of double-channel heated at higher flow velocity.

关 键 词：矩形双通道 非单值性 管间脉动 流动不稳定性 热工水力 

分 类 号：TK124[动力工程及工程热物理—工程热物理]