火源和壁面材料对轰燃影响的数值模拟  

Numerical modeling of effect of fire source and wall materials on flashover

作　　者：宋虎[1] 杨立中[1] 范维澄[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《自然灾害学报》2002年第1期91-96,共6页Journal of Natural Disasters

基　　金：国家自然科学基金重点资助项目(59936140)

摘　　要：轰燃是建筑火灾中一类特殊的火灾现象，其引起的危害是巨大的。有很多因素会影响轰燃的产生，在这些因素中，火源类型大小及壁面参数等对轰燃发生时的热烟气温度和热释放速率有重要的影响．本文利用区域模拟方法计算了这些因素的影响情况．计算结果表明，火源对火灾的蔓延影响十分显著；墙壁材料可燃的难易程度会大大改变轰燃发生的时间．Flashover, which often results in fatal disaster, is an important phenomenon in compartment fires. The occurrence of flashover depends on many parameters. Among these factors, fire type, fire size and wall materials play an important role in the temperature of the upper hot layer and heat release rate. These three factors are studied in details using zone model in this paper. The results show that the fire source strongly affects the spread of the fire and the wall material also has a critical role in the flashover time.

关 键 词：轰燃 火源 壁面材料 室内火灾 数值模拟 

分 类 号：X928.7[环境科学与工程—安全科学]