The present work investigates the effect of pilot fuel properties on TF combustion using premixed methane-hydrogen-air (CH₄-H₂-air) mixtures ignited by a small amount of diesel pilot. Especially, we are investigating the effect of the cetane number (CN) and aromatic content (AC) on TF combustion in a single-cylinder compression ignition (CI) engine at varying charge air temperatures (T_air = 25 °C, 40 °C, 55 °C) and H₂ volume fractions (M_H2 = 10%, 20%, 40% and 60%) at lean premixed charge mixture conditions (equivalence ratio φ = 0.5). The novelty and main findings of the work consist of the following features: 1) besides the effect of H2 concentration and charge-air temperature, pilot fuel properties also play a crucial role in TF combustion, even a small amount of diesel pilot could dramatically affect the engine performance and combustion stability, 2) the CN and AC are the key factors affect the ignition delay time (IDT) and indicated thermal efficiency (ITE), 3) the in-cylinder pressure oscillation analysis based on a novel Superlets (SL) approach indicates that pilot fuel properties are important to the combustion states and combustion stability.

目前的工作使用由少量柴油引燃器点燃的预混甲烷-氢-空气（CH ₄ -H ₂ -空气）混合物研究引燃燃料特性对 TF 燃烧的影响。特别是，我们正在研究十六烷值 (CN) 和芳烃含量 (AC) 对单缸压燃 (CI) 发动机在不同增压空气温度 (T _air  = 25 °C, 40 °C ) 中 TF 燃烧的影响, 55 °C) 和 H ₂体积分数 (M _H2 = 10%、20%、40% 和 60%）在贫预混混合条件下（当量比 φ = 0.5）。该工作的新颖性和主要发现包括以下特点：1) 除了 H2 浓度和增压空气温度的影响外，引燃燃料的特性在 TF 燃烧中也起着至关重要的作用，即使少量的柴油引燃也会显着影响发动机性能和燃烧稳定性，2) CN 和 AC 是影响点火延迟时间 (IDT) 和指示热效率 (ITE) 的关键因素，3) 基于新型Superlets (SL)的缸内压力振荡分析方法表明，引燃燃料特性对燃烧状态和燃烧稳定性很重要。