Experiments on Flame Spread of a Fuel Droplet Array in a High-Pressure Ambience.
Experiments on Flame Spread of a Fuel Droplet Array in a High-Pressure Ambience.
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高压环境下燃料液滴阵列火焰传播实验。
DOI：
10.1299/jsmeb.41.322
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
T. Niioka
中科院分区：
文献类型：
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作者：
S. Kato;H. Mizuno;Hideaki Kobayashi;T. Niioka
对正十六烷在高压环境下悬浮燃料液滴阵列中的火焰传播现象进行了实验研究。七个相同大小的液滴以相等的水平间距排列。在0.1~2.0兆帕的环境压力下，基于带有图像增强器的高速摄像机检测到的液滴直径为0.50、0.75和1.0 mm的OH发射历史，测量了火焰蔓延速率。结果表明，随着液滴间距的减小，火焰传播速率增大，并在特定间距处达到最大值。由于大的汽化潜热，液滴间距的进一步减小会导致扩散速率的降低。还在微重力场中进行了实验，以确定火焰传播的这些特征是否受到自然对流的影响。
Flame spread phenomena in a suspended fuel droplet array were experimentally investigated for n-hexadecane in a high-pressure ambience. Seven droplets of the same size were arranged at equal horizontal spacings. Flame spread rates were measured based on OH emission histories detected by a high-speed video camera with an image intensifier for droplet diameters of 0.50, 0.75, and 1.0 mm at ambient pressures from 0.1 to 2.0 MPa. Results show that, as droplet spacing becomes smaller, flame spread rate increases and attains a maximum value at a specific spacing. A further decrease in droplet spacing causes the spread rate to decrease due to the large latent heat of vaporization. Experiments were also conducted in a microgravity field to determine if these characteristics of flame spread are affected by natural convection.