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利用木垛火模拟地铁火灾的演化过程 ,在地铁车站出入口的缩尺度模型中进行模拟实验。采用温度相对值 ,分析地铁火灾沿车站出入口烟气温度下降的规律及其影响因素。通过实验图像 ,对烟气分层所需条件以及区域模拟方法在地铁火灾烟气特性研究中的适用性进行了讨论。气体成分测量结果表明 ,出口处烟气中CO的质量分数存在阶梯状变化的规律
The use of woodpile fire to simulate the evolution of subway fire at the subway station entrance scale scale model simulation experiments. Based on the relative temperature, the law of the drop of flue gas temperature along the entrance and exit of the subway station and its influencing factors were analyzed. The feasibility of flue gas stratification and the applicability of the regional simulation method to the study of flue gas characteristics of metro fire are discussed through experimental images. The measurement of gas composition shows that the mass fraction of CO in the flue gas at the outlet changes stepwise