自然循环蒸汽发生器倒U型管内倒流现象影响因素研究  

Investigation on Factors Affecting Reverse Flow in Inverted U-Tubes of Steam Generator Under Natural Circulation

作　　者：郝建立[1] 陈文振[1] 王少明[1] 

机构地区：[1]海军工程大学核能科学与工程系,湖北武汉430033

出　　处：《原子能科学技术》2013年第1期65-69,共5页Atomic Energy Science and Technology

摘　　要：在某些自然循环工况下,蒸汽发生器部分倒U型管内存在倒流现象。基于一维Oberbeck-Boussinesq方程,建立了蒸汽发生器并联倒U型管内单相水流动传热模型,并以两种尺寸的蒸汽发生器为例进行了计算。计算结果表明,小型蒸汽发生器内短管易发生倒流,大型蒸汽发生器内长管易发生倒流;蒸汽发生器进口水温对倒流现象的发生具有重要的影响。For natural circulation, it is shown that reverse flow occurs in the inverted U-tubes of steam generator (SG) at certain low power levels. A flow model based on one-dimensional Oberbeck-Boussinesq equation was formulated to analyze this phenomenon. Two SGs of different scales were calculated. The results show that the reverse flow phenomenon occurs easily in the shorter U-tubes in small SG, but the phenomenon occurs easily in the longer U-tubes in large SG. The inlet temperature has great influence on the occurrence of reverse flow.

关 键 词：蒸汽发生器 自然循环 倒流流动 

分 类 号：TL334[核科学技术—核技术及应用]