金属丝网对火焰波阻隔效应研究  

Research on the blocking effect of wire mesh against flame wave

作　　者：顾涛[1] 王凯全[1] 疏小勇[1] 王学友[1] 

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164

出　　处：《消防科学与技术》2014年第1期14-17,共4页Fire Science and Technology

基　　金：国家"十二五"科技支撑计划项目(2011BAK03B08)

摘　　要：为了研究网状金属材料对火焰波的阻隔作用,设计了可架设阻隔材料的气体爆炸箱,借助高速摄像机及ProAnalyst软件,测定了不同点火位置,不同网状金属材料条件下的气体爆燃后火焰波运动状态,进而分析了网状金属材料在该条件下的阻隔作用。实验结果表明:同一材质的阻隔物距离点火源越近,对火焰波传播的阻隔作用越明显,在距离超过一定范围后,其阻隔作用下降,火焰波自由衰减;在距离相同情况下,不同金属材料对火焰波的阻隔效果与其本身的热传导系数有关,导热系数越大阻隔火焰波的时间越短。由此推导出金属导热系数与阻隔火焰波时间的函数关系。In order to study the effect of the explosion flame hin- dered by mesh metal materials, gas explosion box setting up block material was designed. The flame wave motions of differ ent mesh metal materials in varieties of ignition positions were observed by speed cameras and ProAnalyst software in order to analyze barrier effect under these conditions. The experimental results showed that the closer the barrier apart from the ignition source, the shorter barrier time for the wave propagation of flame. Moreover, the blocking effect disappeared completely and the flame wave attenuated freely when the distance exceeded a certain range. According to these results, the function re- lationship of cut-off interval and distance between ignition source and harrier was deduced. The flame wave barrier effects of different metal materials were related to its coefficient of thermal conductivity. The greater the coefficient of thermal conductivity, the faster the flame wave being cut off. The function relationship of the coefficient of thermal conductivity and time of hindering flame wave was also deduced.

关 键 词：预混气体 火焰波 阻隔效应 火焰速度 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]