摘要
采用Pyrosim建立细水雾幕及地铁隧道火灾模型,采用FDS数值模拟软件,研究细水雾幕参数(流量、粒径)对隧道烟气、温度、能见度的影响。结果表明:细水雾幕作为挡烟屏障可以有效抑制烟气的蔓延;粒径相同,当流量增大时,阻挡效果更好;流量相同,粒径越小,汽化速率越快,降温效果越好,可以有效地提高能见度;当细水雾幕流量为8L/min时降温效率最高,效果更好;当粒径为100μm时阻碍烟气蔓延效果最明显。
Using PyroSim, model of fine water mist curtain and subway tunnel fire was built. Using FDS, the effects of water flux and particle size on smoke spread, gas temperature and visibility were studied.The results showed that using the water mist curtain as smoke blocking barrier can effectively inhibit the spread of smoke;when the particle size is the same, increasing the flux can receive better blocking effect;when the flux is the same, smaller particle size can get faster vaporization rate and better cooling effect, and effectively increase the visibility;the best water flux and particle size can be regarded as 8 L/min and 100 μm, respectively.
作者
程铭
李晔
任业鑫
CHENG Ming;LI Ye;REN Ye-xin(College of Mining Engineering, North China University ofScience and Technology, Hebei Tangshan 063210, China)
出处
《消防科学与技术》
CAS
北大核心
2019年第4期519-521,共3页
Fire Science and Technology
关键词
隧道火灾
细水雾幕
FDS
温度
能见度
tunnel fire
fine water mist curtain
FDS
temperature
visibility
