中文摘要：

利用燃烧室模拟火灾环境，研究密封容器内木材的热解炭化及内部温度分布。结果表明，密封容器内木材的热解炭化发生在表层，内部大部分区域仍为原木；炭化层的厚度受温度影响分布不均，并沿表面缺陷、纹理方向收缩，产生大量缝隙，为热解产生的高温高压气体向内扩散创造了条件，对木材内部热解炭化及温度分布产生显著的影响。

英文摘要：

The authors observed temperature distribution in wood during pyrolysis in a sealed chamber while exposed to fire. They found that： 1） pyrogeneration and carbonization primarily occurred on the wood surface; 2） the carbonized layer had asymmetrical thickness due to variations in the wood temperature; 3） the carbonized layer shrank along the grain and along defects in the wood resulting in many gaps. This helped to increase and diffuse the temperature and gas pressure in the wood causing a significant influence on internal wood pyrolysis and temperature distribution.