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首页> 外文期刊>Combustion Science and Technology >On the Autoignition and Combustion Characteristics of Kerosene Droplets at Elevated Pressure and Temperature
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On the Autoignition and Combustion Characteristics of Kerosene Droplets at Elevated Pressure and Temperature

机译：高温高压下煤油滴的自燃和燃烧特性

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The effects of high ambient pressure and temperature were experimentally investigated on the autoignition delay times of isolated kerosene fuel droplets. The droplet was hanged at the tip of a quartz fiber and suddenly exposed to high ambient temperature by the help of falling electric furnace at desired ambient pressures under normal gravity. The ignition was detected visually by the use of high-speed photography. Results have shown that the autoignition delay time decreases with an increase in both temperature and pressure. Also an increase in ambient pressure reduces the ignition location distance from the droplet. The experimental results of autoignition delay times were correlated with the equation τ = AP~Bexp(D/T). The combustion of the kerosene droplet was also investigated at various ambient temperatures and at atmospheric pressure. The droplet burning rate was calculated using temporal histories of droplet diameter. The droplet combustion followed d~2-law. And a comparison between evaporation and burning rate constants has shown that their difference reduces at higher ambient temperatures.
机译：实验研究了高环境压力和温度对分离的煤油液滴自燃延迟时间的影响。液滴被悬挂在石英纤维的尖端，并通过在正常重力下以所需环境压力下降的电炉的帮助下突然暴露于高环境温度。通过使用高速摄影在视觉上检测到点火。结果表明，自燃延迟时间随温度和压力的增加而减少。同样，环境压力的增加减小了与液滴的点火位置距离。自燃延迟时间的实验结果与方程τ= AP〜Bexp（D / T）相关。还研究了煤油液滴在各种环境温度和大气压下的燃烧。使用液滴直径的时间历史来计算液滴燃烧速率。液滴燃烧遵循d〜2定律。蒸发速率常数和燃烧速率常数之间的比较表明，在较高的环境温度下，它们之间的差异会减小。

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