Experimental study of opposed flow flame spread over wood fiber/thermoplastic composite materials
Experimental study of opposed flow flame spread over wood fiber/thermoplastic composite materials
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DOI：
10.1016/s0010-2180(99)00007-3
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发表时间：
1999-08
影响因子：
4.4
通讯作者：
A. Oladipo;I. Wichman
中科院分区：
文献类型：
--
作者：
A. Oladipo;I. Wichman
给出了火焰在热厚复合材料试样上传播的实验研究结果。该研究的目的是确定材料性质变化和有限速率化学对扩散速率的影响，并获得化学因子对氧化剂流中氧气质量分数的依赖关系。为此，火焰蔓延率从垂直方向倾斜在不同角度的样品，首先在氧气环境中测量和结果用于建立“唯一”的影响流向重力的蔓延过程。然后在用氮气稀释的氧化剂流中使用各种成分的复合材料进行第二组火焰蔓延测试。最后，这两组实验的结果被纳入到现有的火焰传播速率公式推导出的影响，材料性能的变化和有限速率化学的传播速率。结果显示与之前的研究在定性上具有良好的一致性，并对化学因素的本质产生了新的见解，这可以帮助基础理论的进一步发展。
The results of an experimental investigation of flame spread over thermally thick composite samples are presented. The aim of the study is to establish the influences of material property variation and finite rate chemistry on the rate of spread and also to obtain the dependence of the chemistry factor on the oxygen mass fraction in the oxidizer flow. To this end, flame spread rates over samples inclined at various angles from the vertical direction are first measured in an oxygen environment and the results used to establish the “sole” influence of streamwise gravity on the spread process. A second set of flame spread tests are then performed using composites of various compositions within an oxidizer flow diluted with nitrogen. Finally, the results of both sets of experiments are incorporated into an existing flame spread rate formula to deduce the influences of material property variation and finite rate chemistry on the spread rate. The results show a good qualitative agreement with previous studies and produce new insights into the nature of the chemistry factor that can aid further development of the underlying theory.