管道由封闭向开口转化过程中预混火焰传播特性  

Characteristics of gas premixed flame propagation in pipeline from sealing to opening

作　　者：陈鹏[1,2] 黄福军[2] 纪婧[2] 何昕[2] 

机构地区：[1]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第12期1335-1339,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(51274205);中国矿业大学(北京)煤炭资源与安全开采国家重点实验室开放课题项目(SKLCRSM10KFB13)

摘　　要：为研究泄压强度与泄压口位置对封闭管道内甲烷-空气预混火焰传播的影响规律,通过在方形管道内放置不同厚度的泄压膜并改变泄压口位置进行试验,采用自发光拍摄技术和动态压力测试技术对其观测.研究结果表明:随着泄压膜厚度的增加,泄压前管道内火焰发展越来越充分,压力峰值与压力上升时间也随之增加.泄压之前压力变化曲线一致,当泄压口距离点火端较远时,泄压后各工况下的压力缓慢增加后下降;当泄压口距离点火端较近时,泄压后压力值直接降低.In order to study the characteristics of methane-air premixed flame propagation intluenced by varietal thickness of pressure relief membrane and different pressure relief position, different thickness of pressttre relief membrane and pressure relief positions were used for experiments, and dynamic pressure testing technology and self-luminous shooting technique were used in rectangle conduct. The results indicate that flame develops more abundantly and the peak pressure and pressure rise time increase with the increasing of thickness of rupture disk. Pressure curves are consistent before pressure releasing. However, pressure decreases directly when the pressure relief position is near the ignition end.

关 键 词：甲烷-空气预混气体 火焰结构 泄压膜厚度 泄压位置 压力峰值 

分 类 号：X932[环境科学与工程—安全科学]