封闭空间低浓度CO对CH<sub>4</sub>爆炸影响的数值模拟

封闭空间低浓度CO对CH₄爆炸影响的数值模拟

摘要: 为了研究煤在低温氧化过程中生成的CO对CH₄爆炸产生的影响，首先在理论上分析了CO/CH₄/O₂/N₂混合气体的爆炸下限，依据设定方案开展了充分预混情况下低浓度CO在封闭空间内对CH₄爆炸影响的数值模拟。结果表明：相同条件下，CO浓度的增加降低了甲烷爆炸的可能性；而CO比例的增大提高了爆炸威力；对CO、NO₂的生成影响最大的3个基元反应均为Rxn^#155、Rxn^#156和Rxn^#158。
- 封闭空间 /
- CO /
- 瓦斯爆炸 /
- 数值模拟 /
- 低温氧化 /
- 爆炸下限
Abstract: To discover the effect of CO which is produced by coal during the process of low-temperature oxidation on CH₄explosion, the lower explosion limit of CO/CH₄/O₂/N₂ mixed gas is analyzed, and based on preset scheme, the effect of low CO concentration on CH₄ explosion is researched by numerical simulation under perfectly pre-mixed conditions in closed space. The results indicate that the increase of CO concentration reduces the possibility of methane explosion under the same condition; the raise of CO proportion strengthens explosive effect. Three most influential elementary reactions on the production of CO and NO₂ are Rxn^#155, Rxn^#156 and Rxn^#158.
- closed space /
- CO /
- gas explosion /
- numerical simulation /
- low-temperature oxidation /
- the lower explosion limit

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