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外界热辐射作用下木材热解和着火的预测模型
引用本文:陈晓军,季经纬,杨立中,邓志华.外界热辐射作用下木材热解和着火的预测模型[J].火灾科学,2002,11(3):147-151.
作者姓名:陈晓军  季经纬  杨立中  邓志华
作者单位:中国科学技术大学 火灾科学国家重点实验室,合肥,230026
基金项目:国家自然科学重点基金资助项目(5 9936 14 0 ),青年基金资助项目 (5 0 0 0 6 0 12 )
摘    要:在突发的火灾过程中,可燃性固体材料的着火时间和热解特性是非常关键的参数。建立了预测木材在外界热辐射作用下热解和着火时间的数值模型,可以给出固体的质量损失速率、内部温度场随时间的变化,并根据模型计算得到的表面温度随时间的变化对着火时间进行预测。计算结果和实验测量值相符较好。

关 键 词:外界热辐射作用  木材  热解  着火时间  模型
文章编号:1004-5309(2002)03-0147-05
收稿时间:4/7/2002 12:00:00 AM
修稿时间:5/1/2002 12:00:00 AM

Mathematical Model for Prediction of Pyrolysis and Ignition of Wood Under External Heat Flux
CHEN Xiao-jun,JI Jing-wei,YANG Li-zhong and DENG Zhi-hua.Mathematical Model for Prediction of Pyrolysis and Ignition of Wood Under External Heat Flux[J].Fire Safety Science,2002,11(3):147-151.
Authors:CHEN Xiao-jun  JI Jing-wei  YANG Li-zhong and DENG Zhi-hua
Institution:State Key Laboratory of Fire Science, USTC;State Key Laboratory of Fire Science, USTC;State Key Laboratory of Fire Science, USTC;State Key Laboratory of Fire Science, USTC
Abstract:The pyrolysis and ignition of combustible materials are important processes taking place in an unwanted fire. A prediction model is presented in this paper to study the pyrolysis and ignition time of wood under external heat flux. The solution of the model provides the temperature at each point of the solid and the local solid conversion. And the time to ignition of the wood is predicted with the solution of surface temperature. Good agreements between experimental and theoretical results are obtained.
Keywords:pyrolysis  time to ignition  model
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