摘要
简述可燃气体爆炸极限的测试装置、测定标准和爆炸现象判定指标,分析爆炸容器形状和容积对爆炸极限测定的影响。重点分析氧浓度对爆炸极限的影响规律,以及初始温度、初始湿度和初始压力对爆炸极限的影响。结果表明:初始条件对可燃气体爆炸上限影响较大;二氟甲烷等在高压状态下存在燃烧向分解转换过程,爆炸上限呈现剧增趋势;一些含氟难燃气体存在相对湿度极限。该研究可为爆炸性气体环境探测预警与防爆设计提供参考依据。
The test apparatus, test methods and explosion phenom- ena criterions of gases explosion limits were briefly introduced.The effect of vessel shape and size on experimental flammability limits of gases was analyzed. The influence of oxygen concentra- tion on explosion limit was focused on. The effects of initial tern perature, initial humidity and initial test pressure on explosion lim- it were analyzed, too. The results showed that the upper flamma- bility limits are dependent on the initial test condition;the upper ex- plosion limit of HFC-3 begins to increase very rapidly as the pres sure goes up, because the main reaction mechanism changes from combustion to thermal decomposition in the pressure region; the relative humidity limit of the refrigerant R-410A was described. This investigation is useful in detecting, fire alarm, explosion pre vention design for explosive gas atmosphere.
出处
《消防科学与技术》
CAS
北大核心
2017年第11期1500-1503,共4页
Fire Science and Technology
基金
公安部科技强警基础工作专项(2016GABJC35)
公安部消防局计划项目(2016XFCX07)
