两相自然循环系统压降震荡流动不稳定性起始点研究  

Research on Onset of Pressure Drop Oscillation Flow Instability in A Two-Phase Natural Circulation System

作　　者：彭传新[1] 陈炳德[1] 卓文彬[1] 徐建军[1] 黄彦平[1] 昝元峰[1] 刘文兴[1] 

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610041

出　　处：《核动力工程》2017年第2期32-37,共6页Nuclear Power Engineering

基　　金：国家杰出青年科学基金(11325526);国家自然科学基金(11475161;51406189);四川省科技计划项目青年基金(2014 JQ 0029)

摘　　要：对两相自然循环系统的压降震荡流动不稳定起始点进行研究。实验研究发现当实验本体流体出现充分发展的过冷泡核沸腾后,由于汽泡大量产生,以及稳压器上部在可压缩气体的作用下,自然循环回路与稳压器之间出现波动流量,自然循环系统出现压降震荡型流动不稳定。Bowring模型和Saha-Zuber模型预测实验本体出口发生充分发展欠热泡核沸腾的功率值与与自然循环系统的压降震荡流动不稳定起始点功率实验数据的偏差在8%以内。因此,充分发展的过冷泡核沸腾起始点可认为是自然循环系统的压降震荡流动不稳定起始点。The onset of pressure drop oscillation in a two-phase natural circulation system was investigated in this paper. When the fully developed subcooling nucleate boiling happens in the test section, the fluctuating flow appears between the natural circulation loop and the pressurizer, which is caused by the generation of large amount of bubbles in the test section and the compressible space in the pressurizer. The fluctuating flow results in the occurrence of the pressure drop oscillation （PDO） in the natural circulation system. The power of the test section, when fully-developed sub-cooled nucleate boiling （ FDB ） occurred at the outlet, was calculated using both Bowring model and Saha-Zuber model. The calculated results are compared to the experimental power data at the onset of PDO. The error is less than 8 percent. Therefore the point of FDB can be considered to the onset of the PDO in the natural circulation system.

关 键 词：压降震荡流动不稳定性起始点 两相自然循环 充分发展过冷泡核沸腾 净蒸汽产生点 

分 类 号：TK124[动力工程及工程热物理—工程热物理]