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利用FDS模拟研究走廊中排烟口数量、位置以及挡烟垂壁与缓冲区的结合对高层建筑烟气控制效果的影响,寻找最佳组合烟气控制模式。结果表明,在走廊中部设置1个以排除火灾产生烟气为主的排烟口,在空气幕前方2m处设置1个以排除新鲜空气为主的排气口,并且在排气口后方0.5m处设置1个挡烟垂壁的组合烟气控制模式具有最佳的烟气控制效果。挡烟垂壁离机械排烟口0.5m时,可以有效降低缓冲区及前室的温度和烟气浓度,前室内CO2体积分数下降21.4%,温度下降9℃。当挡烟垂壁离空气幕较近时,走廊内的温度和烟气浓度反而上升。
Using FDS simulation to study the influence of the number and position of exhaust vents in the corridor on the control effect of high-rise building flue gas in combination with the vertical wall and the buffer wall, and to find the best combination flue gas control mode. The results show that in the middle of the corridor, there is one exhaust port to eliminate the smoke produced by the fire. One exhaust air outlet to exclude fresh air is set at 2m in front of the air curtain and 0.5m behind the exhaust port Set a smoke block the wall of the combination of flue gas control mode has the best flue gas control effect. Smoke retaining wall from the mechanical exhaust port 0.5m, can effectively reduce the buffer zone and the front chamber temperature and flue gas concentration, the former indoor CO2 volume fraction fell 21.4%, the temperature dropped 9 ℃. When the smoke curtain wall closer to the air curtain, the corridor temperature and flue gas concentration on the contrary rise.