CAJ | 학술논문

为了保证严重事故下安全壳的完整性，氢气点火器燃烧缓解措施被广泛应用于核电站内。本文在1个20 m3立式圆柱罐体内进行9.28％浓度下的氢气燃烧试验，结合GASFLOW 数值模拟和其他试验数据，对本次试验结果进行了综合分析。试验和模拟结果均表明：9.28％浓度下氢气完全燃烧，罐体内温度和压力快速增加；燃烧过程中罐体内高温气体通过辐射传热、对流换热和相变传热3种方式向罐体结构散热，使得罐体内温度和压力随时间逐渐降低，达到泄压和冷却的作用；燃烧过程有明显的方向性，即点燃后火焰在浮力作用下沿罐体中心线向上传播，到达顶部后转而沿罐体四周向下燃烧，燃烧初期火焰速度为11.15 m／s ；试验中由于内部构件的影响，火焰传播更为复杂。
위료보증엄중사고하안전각적완정성，경기점화기연소완해조시피엄범응용우핵전참내。본문재1개20 m3입식원주관체내진행9.28％농도하적경기연소시험，결합GASFLOW 수치모의화기타시험수거，대본차시험결과진행료종합분석。시험화모의결과균표명：9.28％농도하경기완전연소，관체내온도화압력쾌속증가；연소과정중관체내고온기체통과복사전열、대류환열화상변전열3충방식향관체결구산열，사득관체내온도화압력수시간축점강저，체도설압화냉각적작용；연소과정유명현적방향성，즉점연후화염재부력작용하연관체중심선향상전파，도체정부후전이연관체사주향하연소，연소초기화염속도위11.15 m／s ；시험중유우내부구건적영향，화염전파경위복잡。
The hydrogen igniter combustion mitigation system is widely used in nuclear power plant for the purpose of ensuring the integrity of containment under severe acci‐dent .Combined with the numerical simulation using GASFLOW and other test data , the results obtained from the hydrogen combustion test carried out in a 20 m3 cylinder with 9.28% hydrogen were analyzed .The results show that the hydrogen is completely consumed ,leading to a rapid increase in temperature and pressure inside the tank .T he heat could be transferred from the gas to the cylinder by three means :radiation ,convec‐tion and phase change .T his heat transfer process could largely reduce the temperature and pressure in the cylinder ,resulting in cooling of the gas and depressurization of the tank .At the beginning of the combustion ,the flame will propagate upward along the centerline of the cylinder as a result of buoyancy ;once reaching the roof of the tank ,it turns around and spreads downwards .The flame propagation speed is around 11.15 m/s . Under the influence of different internal structures in the test ,the propagation of the flame is more complex .