Flame spreading over a thin solid in low-speed concurrent flow- Drop tower experimental results and comparison with theory
Flame spreading over a thin solid in low-speed concurrent flow- Drop tower experimental results and comparison with theory
复制标题
火焰在低速并流中在薄固体上传播-落塔实验结果及与理论的比较
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
J. Tien
中科院分区：
文献类型：
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作者：
G. Grayson;K. Sacksteder;P. Ferkul;J. Tien
在5.18型S落塔实验装置中，对低速平行流下薄纸样品的火焰传播进行了实验研究。在实验中，氧摩尔百分含量从30%下降到火焰熄灭极限，强制气流速度从5.29 cm/S下降到熄灭极限。拍摄运动图像来观察火焰的形状、颜色、大小和传播速度。将这些量与描述低速流动中在薄固体上同时传播的火焰的理论模型进行了比较。文中还讨论了微重力下顺流和逆流火焰传播以及低速和高速顺流火焰传播的异同。最后，对使用落塔进行火焰传播研究的局限性进行了评估。
Flame spread over thin paper samples in low-speed concurrent flow is experimentally investigated in a 5.18 s drop tower. In the experiment, the oxygen molar percentage is varied from 30% down to the flame extinction limits and the forced flow velocity from 5.29 cm/s down to the quenching limits. Motion pictures are taken to observe flame shape, color, size, and spread rates. These quantities are compared with a theoretical model describing concurrent flame spread over thin solids in low-speed flows. The paper also discusses the similarity and difference between concurrent-flow and opposed-flow flame spread in microgravity and between low-speed and high-speed concurrent-flow flame spread. Finally the limitations of using a drop tower for flame spread research is assessed.