低压加热通道内间歇式流动特性分析  

Specificity Analysis of Intermittent Flow in a Vertical Heating Channel under Low-Pressure Conditions

作　　者：朱力[1] 陈金波[2] 宫海光 佟立丽[2] 曹学武[2] 

机构地区：[1]中国核动力研究设计院,成都610041 [2]上海交通大学,机械与动力工程学院,上海200240

出　　处：《核动力工程》2015年第1期23-27,共5页Nuclear Power Engineering

基　　金：核反应堆系统设计技术重点实验室资助

摘　　要：实验研究低压加热通道内的间歇式流动行为特性,考察不同工况条件下间歇式流动现象的发生机制及规律,分析不同参数因素对间歇式流动过程的影响,找出其中的关键影响因素。实验结果表明,管路中发生间歇性的蒸汽喷涌现象,整个循环过程存在较长时间的沸腾延迟、流动参数周期性波动变化等典型特征;蒸汽喷涌和过冷液体回流会产生较大的温度和压力变化幅度。对间歇式流动过程影响较为显著的因素是加热功率和系统结构。间歇式流动周期随输入热量和管路长径比的增大而减小。Intermittent flow behavior in a vertical channel under low-pressure coriditions is experimentally studied using a small scale experiment facility in the present study. The effects of different factors on the flow characteristics are investigated in detail. The results reveal that the steam eruption occurs periodically in the vertical channel. This flow pattern shows typical features, such as a time-consuming boiling delay period, and remarkable time-variation of periodicity parameters. The temperature and pressure in the flow channel fluctuates greatly accompanied by steam eruption and refill of super-cooled liquid. The flow period decreases by increasing the heat load and channel aspect ratio.

关 键 词：加热通道 流动不稳定性 间歇式沸腾 

分 类 号：TL334[核科学技术—核技术及应用] O359.1[理学—流体力学]