The Detailed Processes Involved in Flame Spread over Solid Fuels
The Detailed Processes Involved in Flame Spread over Solid Fuels
复制标题
固体燃料上火焰传播的详细过程
DOI：
10.1080/00102208308923651
复制
发表时间：
1983
影响因子：
1.9
通讯作者：
I. Glassman
中科院分区：
文献类型：
--
作者：
S. Ray;I. Glassman
摘要火焰在热稠燃料上的传播速率随相对流速的变化被描述为由三个区域组成。第一个在低的相对流速是由自然诱导流为主，并显示出相对较小的变化的传播速率。第二个政权表现出一个近线性增长的传播速率与相反的流动，并单独由热过程占主导地位。最后一个政权显示了下降率与相反的流动，是一个化学速率过程的主导地位的指示。火焰前面的表面温度和流场测量表明，火焰传播的机制不是通过火焰前面的固体的热传导，而是通过燃料从火焰后面扩散通过淬火层，以在火焰前面产生贫可燃混合物。
Abstract The variation of the flame propagation rate across a thermally-thick fuel as a function of opposed flow velocity is described as consisting of three regimes. The first at low opposed flow velocities is dominated by the naturally induced flow and shows relatively little variation of the propagation rate. The second regime shows a near linear increase of propagation rate with opposed flow and is dominated by thermal processes alone. The last regime shows a decline in rate with opposed flow and is an indication of the dominance of chemical rate processes. Surface temperature and flow field measurements ahead of the flame indicate that the mechanism by which the flame propagates is not by thermal conduction through the solid ahead of the flame, but rather by fuel diffusing from behind the flame through the quench layer to create a lean flammable mixture ahead of the flame.