不同宽度和角度下木材表面火蔓延特性的实验研究  

EXPERIMENTAL STUDY ON CHARACTERISTICS OF FLAME SPREAD OVER THE SURFACE OF WOOD SHEETS WITH DIFFERENT WIDTH UNDER DIFFERENT INCLINED ANGLE

作　　者：纪杰[1] 李杰[1] 孙金华[1] 张英[1] 黄新杰[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：《工程热物理学报》2010年第2期351-354,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50976110);国家自然科学基金重点项目(No.50536030)

摘　　要：选取宽2～11 cm、厚3 mm的樟木、杉木和白木试样进行了一系列实验,测量了火蔓延速度、火焰高度、火焰温度和试样表面温度。结果表明,火焰高度随试样宽度增加而增大,并在宽度增加至某个值后不再增大;同宽度下,密度大的试样火焰高度大。放置角度为负时,不同密度试样的火蔓延速度差较小,角度为正时,火蔓延速度随角度增加而增大,且不同密度试样的火蔓延速度差变大.The 2～11 cm wide and 3 mm thick cedar,whitewood and camphor wood sheets were chosen to conduct a series of experiments.The flame height,flame spread rate,flame temperature and surface temperature were measured.Results have shown that the flame height increased with increasing of sample width until the width to certain value and then remained an approximately steady value.For same sample width,sample with higher density resulted in larger flame height.Under negative inclined angles,the flame spread rate differences among samples with different densities were small,and under positive angles,with increasing of angle,the flame spread rate increased and the rate differences among samples with different densities increased.

关 键 词：木材 火蔓延速度 火焰高度 火焰温度 放置角度 

分 类 号：TK121[动力工程及工程热物理—工程热物理]