细水雾雾强分布及灭火有效性实验研究  

Experimental study on water mist distribution and fire extinguishing effectiveness

作　　者：陶常法[1] 廖光煊[1] 陆嘉[1] 刘海强[1] 王德勇[1] 

机构地区：[1]中国科学技术大学火灾国家重点实验室,安徽合肥230026

出　　处：《火灾科学》2010年第1期45-50,共6页Fire Safety Science

摘　　要：研究了系统压力变化对细水雾雾场分布的影响,定量表征了细水雾雾场分布特性。实验发现系统压力增大,细水雾总流量增大,细水雾分布向中心集中。通过改变燃料种类、系统压力、火源位置等条件,研究不同雾场强度下细水雾对不同燃烧模型的灭火有效性,实验发现在雾场强度较高的情况下,灭火效率很高,而在雾场强度较低的情况下,难以熄灭火焰。雾场强度较低时,细水雾对不同燃料的灭火效果不同,闪点较低的燃料容易强化燃烧,闪点较高的燃料燃烧会受到抑制。This paper studies the effect of pressure change in water mist system on the mist field distribution, and quantitatively displays the characteristic of field distribution of water mist. It is found that the total flow of the water mist increases with the rise of the system pressure, and water mist distribution concentrated to the center. By changing the fuels type, system pressure and fire location, we analyze the extinguishing effectiveness at different water mist intensities. It is also found that the fire extinguishing efficiency is high under the intense water mist field distribution; by contrast, fire will not be extinguished under the low field intensity. On the other hand, the effectiveness of fire extinguishing of water mist is different when the water mist field strength is low, the fire will be strengthened for the low flash point of the fuels, and it will be suppressed while flash points are high.

关 键 词：细水雾 雾场强度 灭火有效性 细水雾分布 

分 类 号：X932[环境科学与工程—安全科学]