本文根据两步反应机理,建立了2维非稳态燃料阴燃的数学模型.该模型考虑了气体在多孔介质内扩散系数的变化.应用该模型模拟了来流速度对阴燃速度及平均最高温度的影响,结果表明;首先阴燃传播速度随着来流速度的增大而增大,当风速为0.2 cm/s时,阴燃速度达到最大值0.0093 cm/s,而后随着风速的增大阴燃速度逐渐降低直至熄灭;来流速度对阴燃最高温度影响不大.同时还模拟了氧气浓度的影响、燃料阴燃中气体组分和固体成分的变化以及温度分布情况.
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