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为了研究走廊火灾的烟气填充过程及其规律,运用FDS 4.0火灾动力学程序对全尺度走廊进行火灾烟气模拟.结果表明:烟气前锋与走廊尽头墙壁碰撞前,走廊尽头附近的烟气下降得最慢,而碰撞之后烟气下降得最快,7 s内下降到0.7 m的高度.走廊尽头聚集了较厚的烟气,且距离火源越远,烟气层越厚,逆流现象越明显.通过顶棚下温度分布的模拟结果与实验结果对比可知,两者有较好的吻合,误差在6℃以内.FDS可以应用于预测走廊火灾,同时也说明了本文模拟方法与模拟结果的可靠性.
In order to study the flue gas filling process and its rule in the corridor fire, the FDS 4.0 fire dynamics program was used to simulate the fire flue gas in the full-scale corridor.The results show that the flue gas near the end of the corridor drops before the flue gas striker collides with the wall at the end of the corridor The slowest, and the flue gas dropped the fastest after the collision and dropped to a height of 0.7 m within 7 s. The thicker flue gas gathered at the end of the corridor, and the farther away from the fire source, the thicker the flue gas layer, the more countercurrent phenomenon Obviously, the simulation results of the temperature distribution under the roof can be compared with the experimental results, the two are in good agreement, the error is within 6 ° C.FDS can be used to predict corridor fire, and also shows the reliability of the simulation method and simulation results Sex.