卷吸限制与火焰融合对U型外立面保温材料火蔓延的影响  

Effect of Air Entrainment Limitation and Flame Fusion on Fire Spread of U-Shaped Facade Insulation Materials

作　　者：聂一凡 张继薇 赵燚 陈艳秋[1] Nie Yifan;Zhang Jiwei;Zhao Yi;Chen Yanqiu(Department of Fire Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学消防工程系,成都611756

出　　处：《燃烧科学与技术》2024年第5期497-506,共10页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(52308532);四川省科技计划资助项目(2023YFS0405).

摘　　要：本文从火蔓延速率、温度及热流3个方面,研究了U型结构侧向和底部空气卷吸限制以及火焰相互作用对U型结构外立面保温材料顺流火蔓延行为特性的影响.研究发现:侧向空气卷吸限制增大了火蔓延速率、温升和热流;底部空气卷吸限制整体上减小了火蔓延速率、增大了温升和热流;背墙火焰与边墙火焰的相互作用增大了火蔓延速率、温升和热流.In this paper,the effects of lateral and bottom air entrainment limitations and flame fusion on the behavioral characteristics of downstream fire spread of U-shaped structural facade insulation materials were investigated in terms of flame spread rate,temperature and heat flow.It is found that the lateral air entrainment restriction increases the flame spread rate,temperature rise and heat flow;the bottom air entrainment restriction reduces the flame spread rate,increases the temperature rise and heat flow in general;and the interaction between the back wall flame and the side wall flame increases the flame spread rate,temperature rise and heat flow.

关 键 词：建筑外立面 保温材料 顺流火蔓延 U型结构 

分 类 号：TK11[动力工程及工程热物理—热能工程]