通过在某真实的地铁站台开展的全尺寸空气幕挡烟效果实验,研究了不同火源距离下,空气幕出口射流速度和角度对挡烟效果的影响.实验发现,当火源距离楼扶梯口较远时,较小的射流速度和竖直向下的射流角度能起到很好的挡烟效果;当火源距离楼扶梯口较近时,适当增加角度可以有效延长挡烟时间;空气幕出口射流风速取5～7 m/s、倾角取15°～30°时挡烟效果较好;排烟系统开启对烟气蔓延的控制作用优于空气幕,但空气幕并不妨碍排烟系统的排烟效果.%Full-scale experiment of smoke blockage of air curtains were carried out in a real subway station. The smoke blockage effect of air curtain exit jet velocities and angles on scenarios of different fire source distances were studied. It was found that moderate and straight downward exit jet velocity can prevent the smoke movement very well when the fire source relative far from stairs; the smoke blockage ability of air curtain can be effectively improved by increasing the air curtain exit jet angle properly when the fire source is close to stairs; when the velocity is 5~7 m/s, and the angle is 15°~30°, the effect is the best; the smoke exhausting system is better than the air curtain, but the air curtain won't influence the smoke exhausting system.
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