火源房间开口宽度与远距离处一氧化碳浓度关系的实验研究  

Experimental Study on the Relationship Between Vent Width of the Fire Room and CO Concentration at the Distant Location

作　　者：叶俊麒[1] 杨立中[1] 武来喜[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《火灾科学》2008年第3期172-177,共6页Fire Safety Science

基　　金：国家自然基金资助项目(批准号:50576095)

摘　　要：烟气的影响是火灾中人员死亡最主要的原因,而探讨火源房间开口宽度与远距离处烟气浓度关系的研究并不多见。利用了"房间-走廊"结构的小型实验台进行了大量的实验,研究了火灾中烟气危害性成分在不同火源房间开口宽度下向走廊远距离传播的特点。结果表明,门的宽度在一定范围内变化时,对烟气浓度的影响不是很明显,但当门的宽度小于某一个特定值时,烟气浓度会发生突然增大,其危害性也大大增强,同时这种规律也会随着开口高度的降低而逐渐削弱。Lethality of victims in fires is mainly resulted from the smoke, but little study is reported currently on the relationship between vent width of the fire room and smoke concentration at distant locations. In this paper, reduced-scale fire tests are conducted in a room-hallway structure apparatus to study the characteristics of toxicant species of fire smoke which transfers to the remote area down a hallway. Results indicate that the concentration of the smoke is not affected obviously by the opening width which changes in a certain area, while if it is less than a critical value, the concentration of the smoke will increase suddenly, and the smoke hazard will be enhanced remarkably. Such a phenomenon will be weakened by the decrease of the opening height.

关 键 词：火灾烟气 远距离 一氧化碳 开口宽度 

分 类 号：TK121[动力工程及工程热物理—工程热物理]