摘要
为了进一步认识核电站严重事故下安全壳内氢气-空气-蒸汽混合气体输运与冷凝的复杂耦合现象,本文研究了针对冷凝及组分输运的实验装置。利用Star-ccm+软件在宽氦气浓度、宽蒸汽浓度条件下,对单一传热管外蒸汽冷凝及气体输运过程进行数值模拟分析。结合相应的验证实验,提出了用于评估冷凝作用下混合气体氦气分层的经验判别式和理论判别式。模拟结果揭示了蒸汽冷凝作用下氦气-空气-蒸汽混合气体形成稳定的氦气分层,关联式判别结果与实验结果具有较好的一致性。
To further understand the complex coupling phenomenon of the transportation and condensation of the hydrogen-air-steam gaseous mixture in containment under serious nuclear power plant accidents,this research,conducted at the condensation and species transport experimental facility,uses the STAR-CCM+software to perform numerical simulation and analysis of the steam condensation and gas transportation processes outside a single heat transfer tube under the condition of a wide range of helium and steam concentrations.The simulation results reveal that the hydrogen-air-steam mixture forms stable helium stratification under steam condensation.Through corresponding validation experiments,this study proposes anempirical discriminant and a theoretical discriminant for evaluating the helium stratification of mixed gas driven by steam condensation,and the results of the discriminant correlation analysis are consistent with the experimental results.
作者
刘丰
孙中宁
丁铭
边浩志
LIU Feng;SUN Zhongning;DING Ming;BIAN Haozhi(Heilongjiang Provincial Key Laboratory of Nuclear Power System & Equipment, Harbin 150001, China;Harbin Engineering University, Harbin 150001, China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2021年第12期1786-1791,共6页
Journal of Harbin Engineering University
基金
国家重点研发计划(2020YFB1901405,2020YFB1901404).
关键词
核电站安全壳
多组分气体
不凝性气体
冷凝
气体输运
氢气分层
氢气聚集
氢气风险
nuclear power plant containment
multicomponent gas
non-condensable gas
condensation
gas transport
hydrogen stratification
hydrogen accumulation
hydrogen risk
