Abstract Various fuel composites became popular for a last decade because smart mixture of different combustibles allows effective minimization of the negative features of components. In this paper we have observed the influence of water evaporation on the different stages of ignition of the waste derived coal-water slurry with addition of the waste petrochemicals. It was shown that the gas-phase ignition stage and heterogeneous ignition stage of the slurry have the increasing time-separation (from 4 to 50 ms) with a growth of the furnace temperature after 1000 K. It happens because the peak of water vaporization in the volume of fuel shifts closer to the moment of ignition with furnace temperature increase. As result, an additional fuel heating is required before the heterogeneous ignition. The volume power density of volatiles combustion around the fuel droplet grows for 30–40 times with furnace temperature changes from 870 K to 1070 K. However, combustion of the volatiles does not produce heat enough for the immediate beginning of the stable heterogeneous ignition when the water content is about 30–40%. The obtained results can be used in future for an effective optimization of the ignition of the water-filled fuels as well as for a choice of the most effective and ecological combustion regime.

中文翻译：

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充水燃料组合物的点火动力学

摘要 各种燃料复合材料在过去十年变得流行，因为不同可燃物的智能混合可以有效地减少组件的负面特性。在本文中，我们观察了水蒸发对加入废石化产品的废煤水浆在不同点火阶段的影响。结果表明，随着炉温的增加，浆料的气相点火阶段和非均相点火阶段的时间间隔（从 4 到 50 ms）在 1000 K 后随着炉温的增加而增加。这是因为水汽化峰值在随着炉温升高，燃料的体积更接近点火时刻。因此，在异相点火之前需要额外的燃料加热。随着炉温从 870 K 变化到 1070 K，燃料液滴周围挥发物燃烧的体积功率密度增加了 30-40 倍。然而，挥发物的燃烧不会产生足够的热量来立即开始稳定的非均相点火。含水量约为30-40%。所得结果可用于未来有效优化充水燃料的点火以及选择最有效和生态的燃烧方式。