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首页> 外文期刊>Combustion Science and Technology >BURNING AND SOOTING BEHAVIOR OF ETHANOL DROPLET COMBUSTION UNDER MICROGRAVITY CONDITIONS
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BURNING AND SOOTING BEHAVIOR OF ETHANOL DROPLET COMBUSTION UNDER MICROGRAVITY CONDITIONS

机译：微重力条件下乙醇液滴燃烧的燃烧和冲刷行为

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摘要

In an effort to gain a better understanding of the burning and sooting behavior of ethanol, isolated droplet combustion experiments were performed in the 2.2-s drop tower at NASA Glenn Research Center. The measurement of the burning rate, soot standoff ratio, and soot volume fraction are described in which initial droplet diameter, oxygen concentration, and ambient pressure were varied. The experiments reveal that while ethanol droplets burn in 1 -atm air without soot formation, luminous radiation from soot particles is observed at higher pressures, with increased sooting at higher oxygen volume fraction. Increases in the oxygen concentration at elevated pressures results in a nonmonotonic behavior in the measured soot volume fraction. These experiments provide the first quantitative measurements of the soot volume fraction for ethanol droplet burning under microgravity conditions.
机译：为了更好地了解乙醇的燃烧和烟ing行为，在美国宇航局格伦研究中心的2.2 s液滴塔中进行了独立的液滴燃烧实验。描述了燃烧速率，烟灰隔离率和烟灰体积分数的测量，其中改变了初始液滴直径，氧气浓度和环境压力。实验表明，尽管乙醇液滴在1个大气压的空气中燃烧而不会形成烟灰，但在较高的压力下会观察到烟灰颗粒的发光，而在较高的氧气体积分数下烟灰会增加。高压下氧气浓度的增加导致测得的烟灰体积分数具有非单调性。这些实验提供了在微重力条件下燃烧乙醇液滴的烟灰体积分数的首次定量测量。

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