摘要
通过井巷网络火灾的实验研究 ,发现了巷道中燃烧火焰对风流流动的障碍作用及对节流的影响 ,在此基础上提出了火区阻力的新概念 .火区阻力由烟流热膨胀产生的阻力和因风流受到火区火焰的障碍作用产生的局部阻力组成 .燃烧实验表明 ,火区阻力对巷道风流的节流作用明显 ;节流随火灾的发生而产生 ,随火势的发展而增强 ;燃烧规模愈大 ,节流效应愈明显 .研究结果对矿井火灾的模拟计算及指导科学救灾决策有重要的现实意义 .
The obstructive action of flame on airflow, which can make the quantity of air flowing into a tunnel decrease, was observed during the fire experiments in a ventilation network. Based on the discovery, a new concept, fire resistance, was firstly put forward. Fire resistance consists of the resistance induced by thermal expansion of the smoke and that by the flame's obstructive action. The obtained experiment data of combustion indicate that fire resistance has a significant effect on airflow reduction. The reduction of airflow into the tunnel appears as soon as a mine fire occurs, and becomes more obvious when its size enlarges. The result is of great significance for the computer simulation of a mine fire and its rescue work.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2001年第4期328-331,共4页
Journal of China University of Mining & Technology
基金
国家自然科学基金资助项目 (5 9876 0 45
5 9936 14 0 )
关键词
矿井火灾
火区阻力
节流效应
风流
节流作用
Combustion
Computer simulation
Fire resistance
Thermal expansion
