Hu L H, Zhou J W, Huo R, Peng W, Wang H B
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, China.
J Hazard Mater. 2008 Aug 15;156(1-3):327-34. doi: 10.1016/j.jhazmat.2007.12.041. Epub 2007 Dec 23.
Experimental and numerical studies were performed in this paper to study the possibility of utilizing air curtain for confinement of fire-induced smoke and carbon monoxide transportation along channels. Bench scale experiments were preliminarily performed in a 3.6 m long model channel. Complementary computational fluid dynamics (CFD) simulation was carried out by Fire Dynamics Simulator (FDS) for an 88 m long full scale channel, in order to see the longitudinal carbon monoxide concentration distribution along the real channel with air curtain discharged. Results showed that both the smoke and CO gases released by the fire were well confined to almost remain in the near fire region of the channel at one side of the air curtain. The gas temperature and CO concentration in the protection zone at the other side reduced significantly by an exponential trend with the increase of discharge velocity of the air curtain. These indicated that the air curtain can be an effective measure for confining the transportation of smoke and carbon monoxide species in long channel fires.
本文开展了实验和数值研究，以探讨利用气幕抑制火灾产生的烟雾和一氧化碳沿通道扩散的可能性。首先在一条3.6米长的模型通道中进行了小型实验。然后利用火灾动力学模拟器（FDS）对一条88米长的全尺寸通道进行了补充计算流体动力学（CFD）模拟，以了解在有气幕排放的情况下真实通道内一氧化碳的纵向浓度分布。结果表明，火灾释放的烟雾和一氧化碳气体都被很好地限制在气幕一侧通道的近火源区域内。随着气幕排放速度的增加，另一侧保护区内的气体温度和一氧化碳浓度呈指数趋势显著降低。这些结果表明，气幕可以作为一种有效措施，抑制长通道火灾中烟雾和一氧化碳的扩散。
