原子能科学技术2018，Vol.52Issue(5)：822-828,7.DOI:10.7538/yzk.2017.youxian.0602
低压高过冷度下自然循环流动不稳定性实验研究
Experimental Investigation on Flow Instability under Low Pressure and High Subcooling Natural Circulation Conditions
王强 1高璞珍 1王忠乙 1陈先兵 1黄莹1
作者信息
- 1. 哈尔滨工程大学 核安全与仿真技术国防重点学科实验室,黑龙江哈尔滨150001
- 折叠
摘要
Abstract
An experimental investigation of flow instability in a natural circulation system with long and straight riser was carried out.Meanwhile,a series of typical flow instabilities under low pressure and high inlet subcooling conditions were analyzed in detail.The experiment results show that natural circulation characteristics and flow instability type are affected by the structure and thermal boundary of fluid.Under high inlet subcooling condition,the system could hardly return to two-phase stable state if heat flux exceeds a critical value.With the increase of heat flux,geysering flow instability and compound dynamic instability occur in natural circulation system.According to the experiment data,instability boundary map under high subcooling condition is obtained.Natural circulation driving pressure head and resistance pressure head are strongly affected by the thermal-hydraulic state in heated channel and adiabatic riser.The accumulation of massive bubbles which triggers periodic local high pressure is the primary reason of large oscillation and flow reversal.关键词
自然循环/流动不稳定性/高入口过冷度/间歇泉Key words
natural circulation/flow instability/high inlet subcooling/geysering分类
能源科技引用本文复制引用
王强,高璞珍,王忠乙,陈先兵,黄莹..低压高过冷度下自然循环流动不稳定性实验研究[J].原子能科学技术,2018,52(5):822-828,7.
