低压低含汽率工况下两相自然循环流动不稳定的实验研究  

EXPERIMENTAL STUDY ON TWO PHASE NATURAL CIRCULATION FLOW INSTABILITY UNDER LOW PRESSURE AND LOW STEAM QUALITY

作　　者：郭予飞[1,2] 苏光辉[1,2] 喻真烷 贾斗南[1,2] 武俊梅 

机构地区：[1]西安交通大学 [2]西北纺织学院

出　　处：《核科学与工程》1999年第2期137-141,共5页Nuclear Science and Engineering

基　　金：核工业基金

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)

关 键 词：两相自然循环 质量含汽率 密度波脉动 反应堆 

分 类 号：TL334[核科学技术—核技术及应用]