哈尔滨工程大学学报2026，Vol.47Issue(7)：1369-1377,9.DOI:10.11990/jheu.202411039
破口事故下安全壳内氢气扩散与燃爆特性分析
Analysis of hydrogen diffusion and explosion characteristics inside the containment vessel during LOCA accident
摘要
Abstract
When a serious accident occurs in a nuclear power plant,hydrogen gas released from the breach will spread into the containment vessel,once hydrogen gas accumulates locally and reaches a flammable concentration,it will seriously endanger the integrity of the containment vessel.This study uses numerical simulation methods,analyze the diffusion and explosion characteristics of hydrogen gas inside the containment vessel under multi-component gas conditions.The results indicate that when the mixed gas containing hydrogen is released through the breach,there will be a significant three-stage distribution of hydrogen concentration inside the containment vessel,form a high concentration accumulation zone near the breach location and generate large eddy currents in the headspace.After the mixed gas inside the containment is ignited in the later stage of the accident,detonation will occur,at this time,the flame propagation speed is greater than the speed of sound,and the flame surface is smooth and flat;During the flame propagation process,there is a significant pressure difference throughout the entire area,and the pressure wave profile highly overlaps with the flame propagation trajectory.The highest-pressure during propagation can reach 7.8×105 Pa,which can easily damage the containment structure.关键词
安全壳/氢气燃烧/密闭空间/预混燃烧/湍流火焰/严重事故/多组分气体/氢气扩散Key words
containment/serious accidents/multicomponent gas/hydrogen diffusion/hydrogen combustion/con-fined space/premixed combustion/turbulent flames分类
能源科技引用本文复制引用
吴桐雨,张璐,刘鑫棪,边浩志,刘丰..破口事故下安全壳内氢气扩散与燃爆特性分析[J].哈尔滨工程大学学报,2026,47(7):1369-1377,9.基金项目
国家自然科学基金项目(52106236) （52106236）
黑龙江省青年科技人才托举工程项目(2023QNTJ). （2023QNTJ）
