热源条件下油气二次热着火实验

Secondarythermalignitionofgasoline-airmixtureinducedbyhotsource

摘要: 针对实际工况地下受限空间一次着火明火熄灭后,残余气体遭遇局部高温热源而导致的二次热着火的特殊现象进行实验。讨论了油气二次热着火的临界温度、临界浓度、着火强度、着火概率和着火模式。发现油气二次热着火的强度和概率更大,着火持续时间更短。总结出油气一次热着火后遭遇高温热源能否发生二次热着火的综合判据。二次热着火概率与环境温度的关系满足指数关系式 =aeb cT+d 。
- 爆炸力学 /
- 热源 /
- 二次热着火 /
- 油气混合
Abstract: Anexperimentonthegasoline-airmixturesecondarythermalignitionwasoperatedunder theconditionsthattheresidualgasformedafterthefirstthermalignitionextinguishedencountered thelocalhotsourceagain.Accordingtoexperimentalresults,thecriticalignitiontemperature,the criticalconcentration,thechangerulesoftheignitionprobability,theignitionintensityandignition mannerswerediscussedindetail.Comparedwiththefirstthermalignition,thesecondarythermalignitionofthegasoline- airmixtureiseasier,theignitionintensityisstronger,andthetimeoffireis longer.Thegeneralcriterionofthesecondarythermalignitionofgasoline-airmixturewassummarized. Therelationbetweentheambienttemperatureandtheignitionprobabilitycanbeexpressedby theequation =aeb cT+d .
- mechanicsofexplosion /
- secondarythermalignition /
- hotsource /
- gasoline-airmixture