自然循环蒸汽发生器倒U型管内的倒流计算  

Calculation of Reverse Flow in Inverted U-Tubes of Steam Generator during Natural Circulation

作　　者：杨瑞昌[1] 刘京宫[1] 黄彦平[2] 刘若雷[1] 覃世伟[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084 [2]中国核动力研究设计院空泡物理和自然循环重点实验室,成都610041

出　　处：《核动力工程》2010年第1期57-60,共4页Nuclear Power Engineering

基　　金：国家自然科学基金项目(50676051);空泡物理和自然循环重点实验室基金资助项目

摘　　要：采用同时表示正流和倒流的全水动力特性曲线分析了自然循环压水堆一回路系统蒸汽发生器倒U型管内发生倒流的机理。针对蒸汽发生器内倒U型管数量巨大问题,提出了一种集总-分布参数模型。该模型用于计算实际自然循环蒸汽发生器倒U型管内的倒流时,具有计算快捷且精度高的优点。利用该模型对自然循环蒸汽发生器并联倒U型管内的正、倒流进行计算,并将计算结果与所有倒U型管逐根进行正、倒流计算的结果进行比较,结果十分接近,验证了本文模型的可靠性。The mechanism of reverse flow in inverted U-tubes of steam generators of pressurized water reactors during natural circulation is analyzed by using the full range characteristic curve of parallel U-tubes. A lumped-distributed model to calculate the reverse flow occurred in inverted U-tubes of real steam generators with a large number of U-tubes during natural circulation is developed. The model has the advantages of quick calculation and high accuracy for the analysis of reverse flow in inverted U-tubes of real steam generators with natural circulation. This model has been used to calculate the normal and reverse flows occurred in inverted U-tubes of a steam generator with natural circulation. The comparison of calculated results indicates a well agreement with that predicted by the model in which normal or reverse flow in each individual U-tube is analyzed, which verifies the reliability of the model developed in this paper.

关 键 词：蒸汽发生器 自然循环 倒流 计算模型 

分 类 号：TK22[动力工程及工程热物理—动力机械及工程]