The distillation curve and sooting propensity of a typical jet fuel
The distillation curve and sooting propensity of a typical jet fuel
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DOI：
10.1016/j.fuel.2018.07.099
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发表时间：
2019-01-01
期刊：
影响因子：
7.4
通讯作者：
Wang, Hai
中科院分区：
文献类型：
--
作者：
Saggese, Chiara;Singh, Ajay V.;Wang, Hai
真正的喷气燃料是许多有机成分的复杂混合物，其中一些是芳香族化合物。在蒸馏曲线的高温端，一些燃料成分是多环化合物。燃料中少量的这些高分子物质可能会影响实际发动机中的碳烟成核，特别是当燃料以喷雾形式喷射时。这项工作旨在突出喷气燃料的碳烟倾向随馏分馏分的变化，并检验替代燃料在模拟真实燃料产生碳烟方面的有效性。研究了掺入Jet A、不同馏分和第二代MURI替代物的层流预混拉伸稳定乙烯火焰的粒度分布函数和碳烟体积分数。还研究了在逆流和同流扩散火焰中掺入真实喷气燃料及其馏分时产生的碳烟。结果表明，高沸点馏分主要影响碳烟的成核，在成核控制火焰中产生的碳烟明显多于轻分子组分和喷气燃料，而在碳烟生成受表面生长控制的火焰中，这种影响较小。讨论了馏分对碳烟成核倾向的潜在影响。
Real jet fuels are complex mixtures of many organic components, some of which are aromatic compounds. Towards the high-temperature end of the distillation curve, some of the fuel components are multi-ring compounds. A small amount of these high molecular weight species in the fuel could impact soot nucleation in practical engines especially when the fuel is injected as a spray. This work aims to highlight the variation of the sooting propensity of jet fuels as a function of distillate fractions and to examine the validity of a surrogate fuel in emulating soot production from real fuels. Particle size distribution functions and soot volume fractions are studied in a series of laminar premixed stretch-stabilized ethylene flames doped with Jet A, its various distillate fractions, and the 2nd generation MURI surrogate. Soot formation as a result of doping real jet fuel and its distillate fractions is also investigated in counterflow and coflow diffusion flames. The results show that the higher-boiling distillates mostly influence soot nucleation and produce substantially more soot in nucleation controlled flames than the light molecular fraction and jet fuel as received, while such an effect is seen to be small in flames where soot production is controlled by surface growth. The potential impact of distillate fractions on soot nucleation propensities is discussed.