Flame propagation in liquid-fuel droplet arrays at elevated pressure under microgravity.
Flame propagation in liquid-fuel droplet arrays at elevated pressure under microgravity.
复制标题
微重力下高压液体燃料液滴阵列中的火焰传播。
DOI：
10.1299/kikaib.55.1241
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
S. Okajima
中科院分区：
文献类型：
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作者：
Shigenori Yosida;H. Hara;S. Okajima
对微重力条件下燃料液滴阵列的燃烧行为进行了实验研究。研究了环境压力对火焰传播的影响。得到了火焰传播速度和传播机理等基本特性。结果表明，火焰传播有三种不同的模式，这取决于环境压力和液滴间距，即：1）火焰沿沿着燃料液滴阵列平稳传播。2)火焰间歇地传播。3)火焰以极其间歇的方式传播，其中两个相邻的未燃烧的燃料液滴几乎同时被点燃。在每一种情况下，火焰传播速度可以计算，它被发现，它继续迅速降低，随着环境压力的增加。
Experiments were conducted to study the combustion behavior of a fuel droplet array under microgravity. The effect of the ambient pressure on the flame propagation was investigated. Also the fundamental characteristics such as the flame propagation velocity and its mechanism were obtained. The results show that there are three different patterns of flame propagation, which depend on the ambient pressure and droplet spacing, as follows: 1) The flame propagates smoothly along a fuel droplet array. 2) The flame propagates intermittently. 3) The flame propagates in an extremely intermittent manner, where two adjacent unburnt fuel droplets are ignited at almost the same time. In every case, the flame propagation velocity can be calculated and it is found that it continues to decrease rapidly with increasing ambient pressure.