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甲烷-空气最小点火能量预测理论模型

DOI: 10.11858/gywlxb.2012.03.009, PP. 301-305

Keywords: 气体爆炸,最小点火能,临界温度,点火,热点

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Abstract:

最小点火能是可燃气体危险性辨识的重要参数之一。为从理论上得到混合气体的最小点火能,建立了可燃气体火花点火的物理模型,给出了通过数值模拟得到的可燃气体最小点火能量的预测方法,采用该方法得到了甲烷-空气混合气火花点火的临界温度及最小点火能量。结果表明:甲烷-空气混合气的最小点火能量与浓度呈U型关系,浓度为8.5%的预混气的最小点火能量计算值为0.39mJ,与实验值0.4mJ吻合较好。

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