原子能科学技术2018，Vol.52Issue(1)：64-69,6.DOI:10.7538/yzk.2017.youxian.0160
用于缓减UTSG倒流的U型管改进研究
Improvement of U-tube for Easing Reverse Flow in UTSG
摘要
Abstract
For the reverse flow to occur within partial U-tubes of U-tube steam genera-tor (UTSG) under natural circulations ,a new asymmetric U-tube was proposed to enhance the natural circulation capacity and ease the reverse flow .Based on the basic conservation equations ,the mathematical model was developed for calculating the pres-sure drop in U-tube and elevation difference between cold and heat sources .On this basis ,taking a nuclear power plant U-tube as prototype ,the changes of critical mass flux and elevation difference between heat and cold sources were calculated before and after improvement .The results show that the new asymmetric U-tube can reduce criti-cal mass flux significantly and increase the elevation difference between heat and cold sources .The appropriate adjustment of the length ratio between up section and down section can ease reverse flow and improve the natural circulation capacity .关键词
非对称U型管/倒流/自然循环/冷热源位差Key words
asymmetric U-tube/reverse flow/natural circulation/elevation difference betw een cold and heat sources分类
能源科技引用本文复制引用
胡高杰,于雷,郝建立,李伟通..用于缓减UTSG倒流的U型管改进研究[J].原子能科学技术,2018,52(1):64-69,6.基金项目
国家自然科学基金资助项目(11502298) （11502298）
中国核动力研究设计院核反应堆系统设计技术重点实验室基金资助项目(HT-ZDSY-02-2015004) （HT-ZDSY-02-2015004）
