化工进展2017，Vol.36Issue(10)：3596-3603,8.DOI:10.16085/j.issn.1000-6613.2017-0351
四氟乙烷对甲烷/空气爆炸特性的影响
Experimental study on the effects of R134a on the characteristics of methane/air explosion
摘要
Abstract
In order to study the inhibitory effect of R134a (CH2FCF3) on methane/air explosion,the experimental tube system for explosion was set up.In the experiments,with and without R134a,the explosion processes were observed,and pressures and flame propagation velocities were measured.Then,the inhibitory effect of R134a was analyzed qualitatively and quantitatively.The results showed that the PVC film is broken by itself at the pressure about 8kPa,uncorrelated with the amount of R134a.But the broken moment is delayed with the spraying amount of R134a.Underthe same methane concentration,the flame propagation velocity decreases gradually in the tube with the increase of the R134a concentration.When the CH4 concentration is close to the equivalent ratio,the influence of R134a to suppress the flame propagation becomes smaller,but the inhibitory effect on the overpressure is still great.When a volume fraction of 2.67％ R134a is added to initial methane/air mixtures with methane concentrations at 9.0％,9.5％ and 10.0％,the peak values of overpressure reduce 25.34％,61.78％,38.73％,respectively,and the average flame propagation velocities are slow down to 1.28,1.423 and 1.17 times respectively.The inhibition of R134a is mainly due to the mechanism that free radical F· produced by R134a strongly disturbs and impedes the normal oxidative chain of gas fuel and oxygen.关键词
爆炸/安全/甲烷/抑制/四氟乙烷Key words
explosion/safety/methane/inhibition/tetrafluoroethane (CH2FCF3)分类
资源环境引用本文复制引用
路长,刘洋,于子凯,潘荣锟,刘磊,滕飞..四氟乙烷对甲烷/空气爆炸特性的影响[J].化工进展,2017,36(10):3596-3603,8.基金项目
国家自然科学基金(51674103,51304070,50906023)及河南省高等学校青年骨干教师资助计划(2011GGJS-051)项目. （51674103,51304070,50906023）
