湍流状态下甲烷爆炸极限的测试研究  

Explosive limits of methane in turbulent flow

作　　者：谢溢月 谭迎新[1] 孙彦龙[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《中国安全科学学报》2016年第11期65-69,共5页China Safety Science Journal

基　　金：山西省重点研发计划(指南)项目(201603D121012)

摘　　要：为探索空气与甲烷气体混合物在流动状态下的爆炸特性，采用FRTA爆炸极限测试仪，对比研究甲烷在宏观静止状态和不同湍流强度下的爆炸极限。通过测试容器内置搅拌转子转速表征混合气体的湍流强度，并利用兰金组合涡模型分析混合气体爆炸极限与其湍流强度的关系。结果表明：宏观静止状态下甲烷爆炸范围为5．077％～15．433％；当搅拌子转速从0增大到1200rad／s时，甲烷爆炸下限上升为5．484％，爆炸上限降低为15．086％。For the sake of exploring explosion characteristics of the mixture of methane and air in the turbulent flow, experiments were carried out with an FRTA explosion limits tester. The results indicate that： with the increasing of turbulence intensity, the methane lower explosion limit increases, the upper explosion limit declines, and the explosion range narrows,that in the macro stationary state, the methane explosion range is 5.077%-15.433%, and that when the stir speed is 1 200 rad/s, the lower explosion limit of methane reaches 5.484%,the upper explosion limit of methane declines to 15.086%.

关 键 词：甲烷 爆炸极限 宏观静止状态 湍流 兰金组合涡模型 

分 类 号：X932[环境科学与工程—安全科学]