矩形窄缝自然循环密度波不稳定特性实验研究  

Experiment Study of Density Wave Instability of Natural Circulation in Narrow Rectangle Channel

作　　者：周涛[1] 刘亮[1] 李宇[1] 李精精[1] 肖泽军[2] 

机构地区：[1]华北电力大学核热工安全与标准化研究所,北京102206 [2]中国核动力研究设计院,四川成都610041

出　　处：《原子能科学技术》2015年第5期848-851,共4页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(50976033);中央高校基本科研业务专项资金资助项目(2014BJ0086);中国核动力研究设计院二所项目资助(2013-07)

摘　　要：以去离子水为工质,对其两相自然循环流动不稳定性进行了实验研究,得到了2mm和5mm的矩形缝隙条件下的流量变化情况。实验结果分析表明：2mm矩形窄缝的流量波动周期为4~5s,5mm的流量波动周期为5~7s;2mm矩形窄缝的上下振幅对称性不佳,5mm的上下振幅对称性较好;随着加热量的增加,2mm和5mm矩形窄缝的波动周期均会增大。2mm矩形窄缝随着功率的增加,出现了流量漂移,密度波波动特征减弱。The experimental study was performed to investigate the flow instability in a natural circulation system by using deionized water, which gained the changeable situation of the flow rate in the narrow rectangle channel at the size of 2 mm and 5 mm. The analysis results show that the periods of wave with 2 mm and 5 mm narrow rectangle channel are 4-5 s and 5-7 s respectively, the symmetrical characteristic of the amplitude of 2 mm is not good as the 5 mm it is, and the periods of the 2 mm and 5 mm increase with the heating power. With the heating power increasing, flow excursion phenomenon happens in the channel at the size of 2 mm, and the characteristic of density wave weakens.

关 键 词：密度波 矩形窄缝 不稳定性 自然循环 

分 类 号：TK124[动力工程及工程热物理—工程热物理]