摘要
回燃是在通风受限的建筑火灾进入缺氧燃烧甚至闷烧后 ,由于新鲜空气的突然大量补充引起热烟气急剧燃烧的现象 ,这种转捩现象是典型的非线性行为。利用能量平衡原理建立了建筑火灾中回燃现象的简化数学模型 ,并利用非线性动力学中的突变原理分析其突变机理。结果表明 ,回燃现象是一种典型的突变行为 。
The backdraft phenomenon is a fire phenomenon in vitiated buildings where the hot has rapidly combusts due to abruptly supplying abundant fresh air after combustion with lack of oxygen or even smoldering. This transient phenomenon is an example of typical nonlinear behavior. A simplified mathematical model of the backdraft phenomenon in building fires was established based on the law of energy conservation, and the catastrophe mechanism was analyzed using catastrophe theory in nonlinear dynamics. It indicates that the backdraft phenomenon is a kind of typical catastrophe behavior with common characteristics of catastrophe.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2002年第4期314-318,共5页
Journal of Combustion Science and Technology
基金
国家重点基础研究专项经费(2 0 0 1 CB40 960 0 )
国家自然科学基金资助项目 (599361 4 0 )
关键词
建筑火灾
回燃
非线性动力学
通风
数学模型
Buildings
Combustion
Dynamics
Energy conservation
Mathematical models
Nonlinear systems
