Behavior of flame spread downward over thick wood sheets and heat transfer analysis
Behavior of flame spread downward over thick wood sheets and heat transfer analysis
复制标题
火焰在厚木板上向下传播的行为和传热分析
DOI：
10.1177/0734904107062356
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发表时间：
2007-01-01
影响因子：
1.9
通讯作者：
He, Xuechao
中科院分区：
文献类型：
--
作者：
Chen, Peng;Sun, Jinhua;He, Xuechao
为了研究自然对流条件下炭化材料上的火焰传播机理，选择了0.9 - 3 mm厚的木板。测量了平均火焰传播速度V随厚度δ的变化。典型的火焰形状的木材表面上记录使用CCD。气相温度场由一组精细热电偶检测。在此基础上，评价了热解前沿局部传热模式的相对贡献。发现通过固相的热传导随着δ的增加而显著增加。提出了一个与热解结构耦合的火焰传播模型。
To investigate the flame spreading mechanism over charring materials under natural convection, wood sheets from 0.9 to 3mm thickness have been chosen. The variation of mean flame spread velocity V with thickness delta is measured. Typical flame shapes over the wood surfaces are recorded using CCD. The temperature fields in the gas phase are examined by a set of fine thermocouples. On the basis of the results, the relative contributions of local heat transfer modes ahead of the pyrolysis front have been evaluated. It is found that heat conduction through solid phase increases notably with delta. A flame spreading model coupled with a pyrolysis structure is proposed.