Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels
Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels
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DOI：
10.4271/2007-01-0201
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发表时间：
2007-04
期刊：
影响因子：
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通讯作者：
J. Farrell;N. Cernansky;F. Dryer;C. Law;D. Friend;C. Hergart;R. McDavid;A. K. Patel;C. Mueller-C
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文献类型：
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作者：
J. Farrell;N. Cernansky;F. Dryer;C. Law;D. Friend;C. Hergart;R. McDavid;A. K. Patel;C. Mueller-C
包括真实燃烧/排放化学的计算流体动力学（CFD）模拟有望显著缩短先进高效、低排放发动机的开发时间。然而，要实现这一潜力，必须克服重大挑战。本文讨论了这些挑战的背景下，柴油机燃烧，并概述了一个技术方案的基础上使用的替代燃料，充分模仿传统柴油燃料中固有的化学复杂性。讨论了这一方案的基本组成部分，包括：（a）替代组分的选择;（B）必要的基本化学动力学、热化学和物理性质数据的获取或估计;（c）准确的预测化学动力学模型的开发，以及必要的基本实验室数据的测量，以验证这些机制;以及（d）使耦合化学/流动计算可行的机理简化工具。在这些努力的同时，需要开发类似的强大的燃料喷射和喷雾过程模型，涉及多组分混合物的广泛的蒸馏特性，以及方法，包括所有这些高保真的子模型在计算效率高的CFD工具。根据柴油机预混燃烧的应用目标，提出了近期和远期的研究计划.在近期，推荐的替代组分包括正癸烷、异辛烷、甲基环己烷和甲苯。对于较长期的，正十六烷，七甲基壬烷，正癸基苯，和1-甲基萘的建议。
Computational fluid dynamic (CFD) simulations that include realistic combustion/emissions chemistry hold the promise of significantly shortening the development time for advanced high-efficiency, low-emission engines. However, significant challenges must be overcome to realize this potential. This paper discusses these challenges in the context of diesel combustion and outlines a technical program based on the use of surrogate fuels that sufficiently emulate the chemical complexity inherent in conventional diesel fuel. The essential components of such a program are discussed and include: (a) surrogate component selection; (b) the acquisition or estimation of requisite elementary chemical kinetic, thermochemical, and physical property data; (c) the development of accurate predictive chemical kinetic models, together with the measurement of the necessary fundamental laboratory data to validate these mechanisms; and (d) mechanism reduction tools to render the coupled chemistry/flow calculations feasible. In parallel to these efforts, the need exists to develop similarly robust models for fuel injection and spray processes involving multicomponent mixtures of wide distillation character, as well as methodologies to include all of these high fidelity submodels in computationally efficient CFD tools. Near- and longerterm research plans are proposed based on an application target of premixed diesel combustion. In the near term, the recommended surrogate components include n-decane, iso-octane, methylcyclohexane, and toluene. For the longer term, n-hexadecane, heptamethylnonane, n-decylbenzene, and 1-methylnaphthalene are proposed.