摘要
在自行研制的火灾固体可燃物热解和着火早期特性试验台上，针对建筑装潢中常用的水曲柳木材进行热解和着火特性试验。辐射热流选择20～70kW／m^2。试验结果表明，水分对木材的热解和着火特性影响很大。相同的辐射热流下，随着含水率的增加，木材的着火时间延长；辐射热流强度对木材的热解和着火也有很大影响，随着外加辐射热流的增加，木材的着火时间逐渐缩短。提出一个考虑水分影响的木材热解模型，通过模型计算的木材表面温度和失重与试验结果对比，两者吻合较好。
Experiments on pyrolysis and ignition of wet woods, widely used in buildings, are carried out on the apparatus for investigating pyrolysis and ignition of combustible materials. Slab-shaped samples of wood （ the area is 100 mm × 100 mm and 15 mm thick） are subjected to different beat fluxes ranging from 20 kW/m^2 to 70 kW/m^2. Experimental results indicate that moisture content has strong effect on pyrolysis and ignition of wood; The increasing moisture content increases the time for spontaneous ignition at the given intensity of radiation. The increasing intensity heat flux decreases the time to ignition. A mathematical model of wood pyrolysis based on typical materials in fire which includes effects of moisture is presented. Good agreements between experimental and theoretical results are obtained.
出处
《能源工程》
2007年第2期10-16,共7页
Energy Engineering
基金
国家重点基础研究(973)项目(2001CB409600)
关键词
辐射热流
含水率
木材
热解与着火
数学模型
radiant heat flux
moisture content
wood
pyrolysis and ignition
mathematical model
