在考虑人为恐怖袭击行为情况下,采用地铁车厢实体模型研究了地铁车厢在纵火情况下的火灾场景特性,得出了地铁车厢在模拟火灾中的热释放速率、烟气浓度、温度、烟密度的变化规律.试验结果表明,一节车厢最大热释放速率为5MW左右,如果两侧沙发同时引燃,其最大热释放速率可达10MW.在纵火试验中,火灾发生、发展和蔓延速度明显较快,燃烧较猛烈,高峰瞬时释放出的CO、CO2浓度及试验过程中的总浓度明显较高;NO、SO2、HCN集中在瞬间释放出来而造成瞬时浓度较高.烟气主流是沿着而不贴着屋顶向外蔓延的.因此火灾危险性很高.%Taking into account the arson terrorism, the fire scenarios characteristic of subway fire had been studied by substantiality model of grocery booth of subway platform. The change rule of heat release rate, smoke concentration, temperature and smoke density had been educed. Experimental results show that, a section train trunk maximum heat release rate for 5MW around, if both sides sofa also ignition, its biggest heat release rate can reach 10MW. In the arson trials, fire occurrence, development and spread speed greatly faster, more fierce, burning the instantaneous release of peak CO and CO2 concentration and test process of total concentration significantly higher;NO, SO2, HCN concentrated in an instant cast out and cause instantaneous high concentration. Smoke mainstream is along without stick roof outward spreads. So fire hazard is very high.
展开▼
