水平碳粒填充床上方气体热辐射对阴燃影响

Influence of gas radiation in layer over horizontal carbon particle bed on smoldering

用分区法计算了水平碳粒阴燃床上方气体层内的辐射换热 .计算结果表明 :气体辐射因素对阴燃转变成明火的影响较大 ,尤其对出现明火后的气体温度分布影响很大 ,而对填充床内的阴燃传播影响较小 .因此 ,当仅考虑填充床内的阴燃传播时可不计填充床上方的气体辐射因素 .

The domain decomposition method was used to study the influence of gas radiation in the air layer over horizontal carbon particle bed on the smoldering in the bed. It is shown that the gas radiation is important to transition from smoldering to flaming, especially to the temperature field in the air layer. On the other hand, the influence on the smoldering in the bed is weak. Hence, it is permitted to neglect the gas radiation in the air layer when the process of smoldering propagation in a horizontal packed bed is modeled.