E-fuels, made from renewable electricity and a CO₂ source, have been proposed as a renewable alternative for the mobility sector. In this work, the ignition process and soot formation of the e-fuel oxymethylene ether 1 (OME₁) and its blends with n-dodecane are investigated. Experiments of the spray ignition of both neat fuels and a promising fuel blend are conducted under the Engine Combustion Network Spray A conditions in a high-pressure spray chamber and it is found that the fuel blend ignites very similar to n-dodecane. To investigate this behavior in more detail, first a kinetic reaction mechanism for blends of OME₁ and n-dodecane is developed and validated using new shock tube measurements. Large-eddy simulations are then performed for the experimental conditions, and spray characteristics as well as ignition delay and flame structure agree well with the experimental results. A super-linear reduction in common soot precursors in the gas phase is found for the fuel blend, which is mainly attributed to a shift of soot precursor production towards higher mixture fractions due to the oxygen content in the fuel. The ignition behavior of OME₁ and the fuel blend is investigated in mixture fraction space using one-dimensional unsteady flamelets. It is found that the slow ignition behavior of OME₁ is rooted in its high stoichiometric mixture fraction, shifting the most reactive mixture for second stage ignition to very fuel-rich regions, which have a low temperature in a spray case with a cold fuel side. The ignition process of the fuel blend is dominated by its n-dodecane fraction up to 60 mol% OME₁ in the blend, and the low increase of ignition delay in this range can be explained by dilution of n-dodecane with OME₁.

已经提出了由可再生电力和CO ₂来源制成的电子燃料，作为交通部门的可再生替代品。在这项工作中，研究了电子燃料甲醛醚1（OME ₁）及其与正十二烷的共混物的着火过程和烟灰形成。在发动机燃烧网络喷雾A的条件下，在高压喷雾室中对纯净燃料和有希望的燃料混合物进行喷雾点火实验，发现该燃料混合物的点火与正十二烷非常相似。为了更详细地研究这种行为，首先是OME ₁和n的混合物的动力学反应机理使用新的激波管测量值开发并验证了十二碳烷。然后针对实验条件进行大涡模拟，喷雾特性以及点火延迟和火焰结构与实验结果吻合良好。对于燃料共混物，发现气相中普通烟灰前体的超线性降低，这主要归因于由于燃料中的氧含量，烟灰前体的产量向较高的混合比转移。使用一维非稳定小火焰在混合物分数空间中研究OME ₁和燃料混合物的着火行为。发现OME ₁的缓慢点火行为其根源在于其高化学计量比的混合气，将用于第二阶段点火的反应性最强的混合气转移到燃料非常丰富的区域，该区域在带有冷燃料侧的喷雾箱中温度较低。燃料共混物的着火过程主要由其正十二烷分数占混合物中OME _1的60摩尔％决定，在该范围内点火延迟的低增长可以通过用OME ₁稀释正十二烷来解释。