不同质量分数水的微乳化柴油微观结构及其燃爆性能

Microstructure and Combustion-Explosion Properties of Micro-Emulsified Diesel Containing Different Mass Fractions of Water

借助高分辨率透射电镜(HRTEM)和纳米激光粒度分析仪(NLPSA),测定了含有不同质量分数水的微乳化柴油中"油包水"(W/O)粒子的微观结构和粒径分布特征;使用液体燃料可持续燃烧性能测定装置和液体燃料爆炸性能评定装置,测定其燃烧和爆炸性能。结果表明,随着微乳化柴油中水的质量分数增加,W/O粒子的平均粒径逐渐增加,粒径分布逐渐变宽,粒径均匀性变差。微乳化柴油中的水的质量分数与其燃爆性能并不是简单的线性关系,而是存在一个最佳值。在考察范围内,水质量分数为10%的微乳化柴油中的W/O粒子对应的平均粒径为25nm,且粒径分布均匀,微乳化柴油闪点最高,强行点火不能持续燃烧,爆炸后的最大压力比配制微乳化柴油用的-10号军用柴油降低14.3%,是一种燃爆倾向显著降低的安全燃料。

The microstructure and size distribution of water-in-oil （W/O） particles in microemulsified diesel （MED） containing different mass fractions of water were measured by high resolution transmission electron microscopy （HRTEM） and nano-laser particle size analyzer （NLPSA）. The combustion-explosion performances of MED containing different mass fractions of water were measured by the sustainable combustion performance analyzer for liquid fuel and instrument of evaluating the explosion properties for liquid fuel. The results showed that the distribution of W/O particle size became wider and the distribution uniformity was getting worse with the increase of water mass fraction in MED. The optimum water mass fraction in MED was10%, at which the average particl obtained, and the MED could not pressure could be reduced by 14.3 e size of 25 nm and good distribution uniformity in MED was burn sustainably after electric arc ignition and the explosive after chemicals detonating. It is proved that the MED with designed microstructure was a preferred safe fuel with the obvious reduction of combustion tendency.