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以帽儿山实验林场的森林凋落物为燃烧材料,在自行设计的实验装置中,进行阴燃实验,记录阴燃过程的温度变化,分析凋落物的阴燃特性以及含水率、松散程度、空气流速对阴燃传播过程的影响,用气相色谱仪来检测阴燃过程中的气体组成。实验结果表明:阴燃的主要挥发气体为CO、CO2。阴燃的传播速度随着空气流速、凋落物松散程度增大而加快,随着凋落物的含水率增加而减慢。该种凋落物具有比较容易引燃、燃烧时间长,蔓延速度较慢、高温维持时间较长的特点。
Taking the forest litter of Maoershan Experimental Forest Farm as the burning material, the smoldering experiment was conducted in the self-designed experiment device to record the temperature change of the smoldering course, analyze the smoldering characteristics of the litter and the moisture content, looseness, air The effect of flow rate on smoldering propagation was examined by gas chromatography to detect gas composition during smoldering. Experimental results show that: the main volatile gas smoldering CO, CO2. The speed of smoldering spread accelerated with air velocity and litter, and slowed down with the increase of water content of litter. The litter is relatively easy to ignite, burn a long time, slow spread, high temperature to maintain a longer time characteristics.