爆炸与冲击2017，Vol.37Issue(3)：453-458,6.DOI:10.11883/1001-1455(2017)03-0453-06
温度、压力对甲烷-空气混合物爆炸极限耦合影响的实验研究
Experimental study on methane-air mixtures explosion limits at normal and elevated initial temperatures and pressures
摘要
Abstract
In order to study the influence of initial conditions on methane-air mixtures explosion limits,the explosion limits of methane-air mixtures were obtained experimentally at different initial temperatures up to 200 C and initial pressures up to 1.0 MPa.The experiments were performed in a closed spherical 20 dm3 vessel with an ignition electrode at the center.The results show that with the increasing of initial temperature and initial pressure,the upper explosion limit increases,but the lower explosion limit decreases,that is the explosion limit expands.At atmospheric pressure/ambient temperature,the dependences of the upper explosion limit and lower explosion limit on initial temperature and initial pressure are both linear in the experimental temperature-pressure ranges.The dependence of the upper explosion limit on initial temperature/initial pressure is influenced by the initial pressure/ initial temperature,but the dependence of the lower explosion limit on those is not influenced obviously.The coupling effects of initial temperature and initial pressure on the upper explosion limit and lower explosion limit are greater than that of a single factor,especially on the upper explosion limit.Surfaces are formed to describe how the initial temperature and initial pressure influence the upper explosion limit and the lower explosion limit of methane-air mixtures.关键词
爆炸极限/初始压力/初始温度/甲烷-空气混合物Key words
explosion limits/initial pressure/initial temperature/methane-air mixtures分类
数理科学引用本文复制引用
高娜,张延松,胡毅亭..温度、压力对甲烷-空气混合物爆炸极限耦合影响的实验研究[J].爆炸与冲击,2017,37(3):453-458,6.基金项目
国家自然科学基金项目(51274238,51374235) （51274238,51374235）
