Effects of sample width on flame spread over horizontal charring solid surfaces on a plateau  

作　　者：ZHANG Ying JI Jie HUANG XinJie SUN JinHua 

机构地区：[1]State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, China

出　　处：《Chinese Science Bulletin》2011年第9期919-924,共6页

基　　金：supported by the National Natural Science Foundation of China (50976110);the National Science Foundation for Post-doctoral Scientists of China (20090450703)

摘　　要：Experiments were conducted on the Tibetan Plateau to investigate the effects of sample width (W) on flame spread over horizontal charring solid surfaces. The results show that the rate of spread is influenced by the combined effects of convection heat transfer and flame radiation. Moreover, two different regimes depending on sample width were found in flame spread behavior. The rate of spread decreased with width in the convective regime (W≤3 cm) but increased in the radiative regime (W>3 cm). Similar results were observed in comparative experiments conducted on a plain in Hefei, with the rate of spread reaching its minimum value at W=4 cm rather than 3 cm.Experiments were conducted on the Tibetan Plateau to investigate the effects of sample width （W） on flame spread over horizontal charring solid surfaces. The results show that the rate of spread is influenced by the combined effects of convection heat transfer and flame radiation. Moreover, two different regimes depending on sample width were found in flame spread behavior. The rate of spread decreased with width in the convective regime （W≤3 cm） but increased in the radiative regime （W〉3 cm）. Similar results were observed in comparative experiments conducted on a plain in Hefei, with the rate of spread reaching its minimum value at W=4 cm rather than 3 cm.

关 键 词：火焰传播 试样宽度 固体表面 青藏高原 炭化 样品 火焰辐射 对流换热 

分 类 号：TK16[动力工程及工程热物理—热能工程] TS176.5[轻工技术与工程—纺织材料与纺织品设计]