摘要
在系统压力０．２ＭＰａ－０．６ＭＰａ，进口过冷度５～４０℃，质量流密度４５０～１６００ｋｇ／（ｍ２ｓ）的范围内，研究了当试验段出口质量含汽率１％左右时垂直上升单管内自然循环两相流动不稳定现象，得到了系统发生密度波型脉动的曲线，并分析了脉动产生的机理。应用微分方程无因次分析方法导出了描述系统极限状态下各参数相互关系的极限状态方程式，由实验数据拟合得出系统发生不稳定界限的经验关系式。
This paper that studied the two phase flow
instabillty for a vertical upward tube in natural circulation loop with exit steam quality of test
section is about 1%. Some oscillation curves are obtained in the experiment, and unstable
mechanism is also presented. By means of dimensionless analysis of partial differential
equations, an equation describing the relation among the system parameter at the threshold
conditions is derived to give an empirical correlation for threshold conditions of flow instability.
The experiment ranges are as follows: P =0.2-0.6 MPa Δ T sub =5-40℃ G
=450-1600kg/(m 2s)
出处
《核科学与工程》
CAS
CSCD
北大核心
1999年第2期137-141,共5页
Nuclear Science and Engineering
基金
核工业基金
关键词
两相自然循环
质量含汽率
密度波脉动
反应堆
two plase natural circulation steam quality density wave
oscillation
