水平纤维质填充床阴燃过程的数值模拟

NUMERICAL SIMULATION OF SMOLDERING PROCESSES IN A HORIZONTAL CELLULOSE PACKED BED

对上方具有空气掠过的水平纤维质填充床的阴燃点燃及阴燃波的传播进行了数值模拟。模型中考虑了燃料的热解、氧化降解和炭的氧化反应，并将热解和氧化降解气体产物分成ＣＯ、ＣＯ２、Ｈ２、Ｈ２Ｏ和ＣＨ４，填充床表面及其上方设ＣＯ气相氧化反应。计算表明，填充床表面的辐射散热量的大小对阴燃波结构影响很大。

The processes of smoldering propagation in a horizontal cellulose packed bed, from ignition until steady state, have been modeled by numerical computation with an air stream over the bed. As chemical reaction, the pyrolytic and oxidative degradation of cel- lulose and the char oxidation are taken into account. The gas phase reaction of CO on and above the bed surface is also included. The calculating results show that the radiation heat loss at the bed surface may greatly influence the smoldering wave structure.