载流雾化水惰化甲烷空气预混气体特性实验研究

摘要

设计了预混气体载流雾化水惰化和抑制燃烧管实验台，对层流火焰的燃烧速度、稳定性及拉伸变形规律进行实验研究，分析了雾化水抑制和熄灭层流预混火焰的过程和机理，获得了雾化水惰化爆炸极限内甲烷和空气预混气体的特性。研究结果表明：浓度为7％的甲烷和空气预混气体，最小惰化雾化水通量为20．8ml／（m2．min）；对于浓度为9％的甲烷和空气预混气体，最小惰化雾化水通量为32．9ml／（m2．min）；对于浓度为11％的甲烷和空气的预混气体，最小惰化雾化水通量为44．6ml／（m2．min）。研究成果为雾化水熄灭甲烷火焰和抑制甲烷爆炸具有一定的指导意义。%A combustion tube experiment platform for inerting characteristics of carried atomized water on premixed methane-air gas was designed, and the rules of combustion velocity, stability and strength rate of laminar flame were experimentally studied.The inerting process and mechanism were analyzed, and the characteristics of inerting premixed methane-air gas within explosion limits by atomized water were acquired.The results showed that:for the premixed methane-air gas with concentration of 7%, the minimum inerting atomized water flux was 20.8ml/(m2・min);for the premixed methane-air gas with concentration of 9%, the minimum inerting atomized water flux was 32.9ml/(m2・ min);for the premixed methane-air gas with concentration of 11%, the minimum inerting atomized water flux was 44.6ml/(m2・ min).The research results has a certain significant for extinguishing methane flame and inhibiting of methane explosion using atomized water.