無重力下での高圧雰囲気中における燃料液滴列の火炎伝ぱ

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  • Flame propagation in liquid-fuel droplet arrays at elevated pressure under microgravity.
  • ムジュウリョクカ デ ノ コウアツ フンイキチュウ ニ オケル ネンリョウ エ

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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.

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