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Numerical Study of Flame Spread in an n-Heptane Droplet Array in Different Ambient Temperature and Microgravity Conditions

机译:不同环境温度和微重力条件下正庚烷液滴阵列火焰扩散的数值研究

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摘要

Flame spread in an ra-heptane droplet array under conditions of microgravity, different ambient temperatures, and droplet spacing is studied numerically. The dimensionless distance, fuel type, and ambient temperature are characteristic parameters that could change the flame spread modes. Variations of the droplet spacing change the amount of the gas fuel on the centerline of droplets, and the flame can either appear between the droplets or pass above this space. A high-temperature environment causes an increase in the flame spread rate. Good qualitative agreement in the flame spread behavior between numerical results and microgravity experiments is obtained. Flame spread rates are obtained for different droplet spacings. This curve has a maximum, similar to experimental result.
机译:在微重力,不同的环境温度和液滴间距的条件下,火焰在正庚烷液滴阵列中扩散。无量纲距离,燃料类型和环境温度是可以改变火焰传播方式的特征参数。液滴间距的变化会改变液滴中心线上的气体燃料量,并且火焰可能会出现在液滴之间或在该空间上方通过。高温环境会导致火焰蔓延速率增加。数值结果与微重力实验在火焰蔓延行为方面取得了良好的定性一致性。对于不同的液滴间距获得火焰蔓延速率。该曲线具有最大值,与实验结果相似。

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