Abstract Compartment fire is a hazardous phenomenon because of the generated poisonous and high-temperature gases. Air curtain systems can be used in order to control the fire spread. This paper examines the numerical simulation method with a focus on the combustion model which can model the poisonous gases and investigates the effect of air curtain on fire. The results of the flamelet generated manifold (FGM) combustion model, which considers all of the poisonous species with detail, in compartment fire with single and multi-floor building have been verified. A three-floor compartment fire scenario with methane as a fuel of 62.9, 500, and 5000 kW heat release rate, which represents over to under-ventilation, was selected as a test case. The impact of air curtains with various supply angles, velocity, and ventilation on pollutants and temperature distribution was examined. The mass fraction of CO and CO2 species reached near zero at angles of 12 and 24, at the over-ventilated case when using air curtain. Therefore, there is no hazard for the upper floors in case of using air curtain. However, in the under-ventilated case, it is necessary to improve the efficiency of air curtain by using ventilation in the fire room and increasing the exhaust velocity of the air curtain.

中文翻译：

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用于控制通风多层建筑中烟雾和火势蔓延的气幕

摘要 车厢火灾是由于产生有毒高温气体而造成的危险现象。可以使用空气幕系统来控制火势蔓延。本文研究了数值模拟方法，重点是可以模拟有毒气体的燃烧模型，并研究空气幕对火灾的影响。火焰生成流形 (FGM) 燃烧模型的结果已得到验证，该模型详细考虑了所有有毒物质，在单层和多层建筑的隔间火灾中。选择以甲烷为燃料的三层隔间火灾场景，其放热率分别为 62.9、500 和 5000 kW，代表通风不足，被选为测试案例。不同供给角度、速度、检查通风对污染物和温度分布。在过度通风的情况下，当使用空气幕时，CO 和 CO2 物质的质量分数在 12 度和 24 度角处接近于零。因此，在使用气幕的情况下，不会对上层造成危害。但是，在通风不足的情况下，需要通过在消防室内利用通风，提高风幕的排气速度来提高风幕的效率。