不同热交换条件下阴燃温度场变化规律研究  

Temperature distribution in smoldering polyurethane foam as a function of heat exchange rate

作　　者：余明高[1] 孟牒[1] 路长[1] 董艳军[1] 赵万里[1] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003

出　　处：《中国矿业大学学报》2011年第5期684-690,共7页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50974055;50906023);河南省基础与前沿技术研究计划项目(092300410045;082300463205);河南理工大学学位论文创新基金

摘　　要：通过搭建小尺寸实验平台,选取不同长度和厚度的材料,改变与外界的换热条件,探讨聚氨酯泡沫材料在阴燃及向明火转化过程中温度场的变化规律.结果表明:在不同热交换条件下,阴燃区域温度场变化很大,温度增加幅度达到150℃.增加聚氨酯泡沫材料的长度和厚度,阴燃区域温度升高速度加快,容易达到气相反应所需的温度,并转为明火燃烧.聚氨酯泡沫材料在改变长度和厚度后以15℃冷水、80℃热水和空气作为换热条件时,对外的散热量分别为:2001.37,1010.8,108.28,1779.28,898.66,95.87,1601.62,809.16,87.15 kJ.A small scale experimental apparatus was used to investigate the temperature distribution in smoldering polyurethane foam.The transition from smoldering to flame was investigated by changing material length or thickness,or changing the rate of heat loss to the environment.The temperature in the smoldering areas was observed to be strongly dependent on heat exchange.Increased lengths or thicknesses of the foam caused the temperature to rise more quickly so that it became easy to reach the temperature where gas-phase oxidation occurs.At this point there is a transition from smoldering to flaming combustion.The foams used had latent heats of 2001.37,1010.8,108.28,1779.28,898.66,95.87,1601.62,809.16,or 87.15 kJ.

关 键 词：阴燃 温度场 热交换条件 聚氨酯泡沫 

分 类 号：X928.7[环境科学与工程—安全科学]