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AbstractSprinklersarethemostreliablemethodavailableforcontrollingbuildingfires.Duetot... Abstract

Sprinklers are the most reliable method available for controlling building fires. Due to the cooling effect by water spray and drag force produced by the water droplets, sprinkler spray can lead to the loss of stability of the stratified smoke layer. In this paper, the cooling effect of water spray is studied. The smoke layer stability and the mass flow rate are also studied. The Fire Dynamics Simulator (FDS) code, based on the concept of large eddy simulation, is adopted in the present simulation. It has been found that the temperature decrease was almost linear to the working pressure of the sprinkler system. The dimensionless pressure to the smoke penetration depth can be expressed as power function. The spray has great effect on the smoke movement inside the compartment.
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2015-04-14 · TA获得超过203个赞
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摘要
喷头可用于控制建筑火灾的最可靠的方法。由于冷却效果的水喷雾的水滴产生的阻力,洒水喷雾可以导致的分层烟气层失稳。在本文中,水喷雾冷却效果的研究。烟气层的稳定和质量流量进行了研究。火灾动力学仿真器(FDS)代码,基于大涡模拟的概念,是目前仿真通过。人们已经发现,温度的降低几乎是线性的自动喷水灭火系统的工作压力。对烟雾的穿透深度的无因次压力可以表达为幂函数。喷雾对车厢内的烟气运动影响很大。
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