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.

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Development of an Experimental Database and Kinetic Models for Surrogate Diesel Fuels

Advances and challenges in explaining fuel spray impingement: How much of single droplet impact research is useful?

Fundamentals of Mixture Formation in Engines- Basic Equations- Modeling Spray and Mixture Formation- Grid Dependencies- Modern Concepts- Conclusions

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Mixture formation in internal combustion engines

Ash formation and deposition in coal and biomass fired combustion systems: Progress and challenges in the field of ash particle sticking and rebound behavior

Donald W. Stanton

Papers

Modeling fuel film formation and wall interaction in diesel engines

Multi-dimensional modeling of thin liquid films and spray-wall interactions resulting from impinging sprays

Influence of spray-wall interaction and fuel films on cold starting in direct injection diesel engines

Multi-dimensional modeling of heat and mass transfer of fuel films resulting from impinging sprays

Investigating the effect of spray targeting and impingement on diesel engine cold start