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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >A Study on Ignition Process of Diesel Sprays
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A Study on Ignition Process of Diesel Sprays

机译：柴油机喷雾点火过程的研究

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The main theme of this study is to reveal the characteristics of the fuel-air mixture that is responsible for ignition of diesel sprays. For this purpose, the ignition process of a spray was studied under diesel-like conditions realized by a rapid compression machine. The fuel-air mixture before ignition was chemically analyzed by a total gas sampling method. The condition to which fuel was subjected was estimated by combining the information on the mixture composition with pressure-time curves and photographs of sprays. The results show that the mixture before ignition has considerably higher temperature than the surrounding air. Oxidation begins very early in the ignition delay period, which supplies heat to the spray and causes cracking and gasification of fuel. It is assumed that the accumulated gas begins to release a large amount of heat triggered by the oxidation of a relatively small-scale mixture.
机译：这项研究的主题是揭示导致柴油喷雾着火的燃油-空气混合物的特征。为此，在由快速压缩机实现的柴油状条件下研究了喷雾的点火过程。通过总气体采样方法对点燃前的燃料-空气混合物进行化学分析。通过将有关混合物组成的信息与压力-时间曲线和喷雾照片结合起来，可以估算出燃料所处的条件。结果表明，点火前的混合物比周围的空气具有更高的温度。氧化在点火延迟期的很早就开始，从而为喷雾提供热量，并导致燃料裂解和气化。假定由于相对较小规模的混合物的氧化而触发积累的气体开始释放大量的热量。

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