Stringent emission legislations and growing health concerns have contributed to the evolution of soot modeling in diesel engines from simple empirical relations to methods involving detailed kinetics and complex aerosol dynamics. In this paper, four different soot models have been evaluated for the high temperature, high pressure combusting dodecane spray cases of engine combustion network (ECN) spray A which mimics engine-relevant conditions. The soot models considered include an empirical, a multistep, a method of moments based, and a discrete sectional method soot model. Two experimental cases with ambient oxygen volume of 21% and 15% have been modeled. A good agreement between simulations and experiments for vapor penetration and heat release rate has been obtained. Quasi-steady soot volume fraction contours for the four soot models have been compared with experiments. Contours of the species and source terms involved in soot modeling have also been compared for a better understanding of soot processes. The empirical soot model results in higher magnitude and spread of soot due to a lack of modeling framework for oxidation through OH species. Among the four models studied, the multistep soot model has been observed to provide the most promising agreement with the experimental data in terms of distribution of soot and location of peak soot volume fraction. Due to a two-way coupling of soot models, the detailed models predict an upstream location for soot as compared to the multi-step soot model which is one way coupled. A significant difference (of an order of magnitude) in the concentration of PAH (polycyclic aromatic hydrocarbons) precursor between multistep and detailed soot models has been observed because of precursor consumption due to the coupling of detailed soot models with chemical kinetics. It is recommended that kinetic schemes, especially those concerning PAH, be validated with experimental data with a kinetics-coupled soot model.

严格的排放法规和对健康的日益关注促使柴油机中的烟灰建模从简单的经验关系演变为涉及详细动力学和复杂气溶胶动力学的方法。在本文中，针对模拟发动机相关条件的发动机燃烧网络（ECN）喷雾A的高温，高压燃烧十二烷喷雾情况，对四种不同的烟灰模型进行了评估。考虑的烟尘模型包括经验性，多步骤，基于矩的方法和离散截面方法烟尘模型。已经模拟了两个环境氧气量分别为21％和15％的实验案例。在模拟和实验之间，对于蒸汽渗透和放热速率已经取得了良好的共识。已经将四个烟灰模型的准稳态烟灰体积分数轮廓与实验进行了比较。还对烟灰建模中涉及的物种和来源术语的轮廓进行了比较，以更好地了解烟灰过程。由于缺乏通过OH物质氧化的建模框架，经验性烟灰模型导致烟灰的数量级更高和扩散。在研究的四个模型中，观察到多步烟灰模型在烟灰分布和峰值烟灰体积分数的位置方面与实验数据最有希望达成一致。由于烟灰模型是双向耦合的，因此与单步耦合的多步烟灰模型相比，详细模型预测了烟灰的上游位置。由于详细的煤烟模型与化学动力学的耦合，由于前驱体的消耗，已经观察到多步和详细的煤烟模型之间PAH（多环芳烃）前体的浓度存在显着差异（一个数量级）。建议使用动力学耦合烟灰模型的实验数据验证动力学方案，尤其是涉及PAH的动力学方案。