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以CRH1高速列车20 kg旅客行李为研究对象,采用家具量热仪和全尺寸试验研究了不同引火源功率、不同通风量等条件下行李点燃特性、热释放速率、质量损失率、热释放总量、烟气释放速率等火灾参数,总结了其燃烧行为及特性。结果表明:高速列车20 kg旅客行李燃烧特性易受通风量、引火源功率等火场环境影响;引燃时间为1~2 min,持续燃烧时间在27~35 min;热释放速率可达347.3 k W以上,因行李压实较为紧密,燃烧不够充分,产生大量高温未完全燃烧气体,极大程度增加列车车厢回燃性;质量损失率较小,行李燃烧不充分;温升速率快,最高温度可达230℃;产烟量较大,透光率最低为35%;行李热释放总量THR随着引火源功率增加而增大,最高可达到213 MJ,控制引火源功率是减小行李热释放总量THR的关键。
Taking the 20 kg passenger baggage of CRH1 high-speed train as the research object, the furniture calorimeter and the full-scale test were used to study the ignition characteristics, the heat release rate, the mass loss rate, the total heat release amount under different ignition source power, , Smoke release rate and other fire parameters, summarized its combustion behavior and characteristics. The results show that the combustion characteristics of baggage of 20 kg passengers in high-speed trains are easily affected by the fire environment such as ventilation rate and ignition source power; the ignition time is 1-2 min, the continuous burning time is 27-35 min; the heat release rate can reach 347.3 kW Due to the compaction of the baggage, the combustion is not enough, resulting in a large amount of incomplete combustion gas at high temperature, which greatly increases the back fire resistance of the train car; the quality loss rate is small and the baggage is not burned adequately; the temperature rise rate is high and the maximum temperature is Up to 230 ℃; the smoke output is relatively large, and the minimum light transmittance is 35%; THR of baggage heat release increases with the increase of ignition power, up to 213 MJ. Controlling ignition source power is to reduce heat release The key to total THR.