Air curtains are used as an industrial tool to control heating and cooling, over time they have been found to be useful for controlling fire and dust. In this paper, the effect of air curtain on fire was investigated in two different positions (above the door in a horizontal mode and next to the door in a vertical mode). Examination of fire requires careful simulation of toxic species and heat transfer; therefore, the combustion model of flamelet generated manifold (FGM) is used to investigate all toxic species. However, in this study, toxic samples of CO and CO₂ are studied. After verifying the combustion model, the vertical air curtain was studied in different heat release rate (HRR) of 62.9, 500, and 5000 kW and in different positions of the fuel bed. Having examined the vertical air curtain at different velocities and ventilation angles, it was observed that the vertical air curtain functioned poorly in under-ventilated case; for example, almost 13 out of 24 rooms in the building had highly dangerous conditions, although in the over-ventilated case, it controlled the fire. But, the horizontal air curtain played the role of a fire controller and kept the mass fraction of toxic species (CO and CO₂) below 5 and 170 ppm in the whole building, respectively.

空气幕被用作控制加热和冷却的工业工具，随着时间的流逝，空气幕被发现可用于控制火灾和灰尘。在本文中，研究了气帘在两个不同位置（水平方向上的门上方和垂直方向上的门旁边）着火的影响。进行火灾检查需要仔细模拟有毒物质和传热；因此，使用火焰小管生成歧管（FGM）的燃烧模型来研究所有有毒物质。然而，在这项研究中，CO和CO _2的有毒样品被研究。在验证了燃烧模型之后，研究了垂直风幕在62.9 kW，500 kW和5000 kW的不同放热率（HRR）以及燃料床的不同位置。在检查了不同速度和通风角度的垂直气幕后，发现在通风不足的情况下，垂直气幕的功能很差。例如，建筑物中24个房间中几乎有13个处于非常危险的状态，尽管在通风过度的情况下，它可以控制火灾。但是，水平风幕起到了消防员的作用，并且使整个建筑物中的有毒物质（CO和CO ₂）的质量分数分别低于5 ppm和170 ppm。