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利用火灾动力学模拟软件FDS,研究了空调系统对室内火灾烟气运移和浓度变化的影响。分析了空调气流对室内空气流场、速度分布的影响,得到了烟气浓度随时间的变化规律。结果表明,空调气流对烟气运移过程有重要影响,稀释了探测器周围的烟气浓度,因而造成报警延误。
Using the fire dynamics simulation software FDS, the influence of air-conditioning system on indoor air flue gas migration and concentration was studied. The influence of air-conditioned airflow on the indoor air flow field and velocity distribution was analyzed. The variation of flue gas concentration with time was obtained. The results show that air-conditioned airflow has an important influence on the flue gas migration process, diluting the concentration of flue gas around the detector, resulting in alarm delay.