SAE 2009 World Congress

Johnson, Timothy V.

doi:10.1595/147106709x481660

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…The continuous development of the existing technology of compression ignition engines requires a deep knowledge of the complex thermal, chemical and fluid dynamics processes that govern the combustion process to further improve its efficiency and quality of exhaust gases. 1–4 Novel advanced combustion systems as well as optimal chamber design and fuel injection strategies 2,5,6 and more efficient after-treatment devices (SCR, LNT, DPF, DOC) 7–10 are required to meet the more and more stringent regulations. 11 Moreover, potentialities associated with the use alternative fuels, eventually mixed with the conventional ones, must be well assessed.…”

Section: Introductionmentioning

confidence: 99%

Modeling diesel combustion with tabulated kinetics and different flame structure assumptions based on flamelet approach

Lucchini

Pontoni

Somers³

2019

International Journal of Engine Research

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Computational fluid dynamics analysis represents a useful approach to design and develop new engine concepts and investigate advanced combustion modes. Large chemical mechanisms are required for a correct description of the combustion process, especially for the prediction of pollutant emissions. Tabulated chemistry models allow to reduce significantly the computational cost, maintaining a good accuracy. In the present work, an investigation of tabulated approaches, based on flamelet assumptions, is carried out to simulate turbulent Diesel combustion in the Spray A framework. The Approximated Diffusion Flamelet is tested under different ambient conditions and compared with Flamelet Generated Manifold, and both models are validated with Engine Combustion Network experimental data. Flame structure, combustion process and soot formation were analyzed in this work. Computed results confirm the impact of the turbulent–chemistry interaction on the ignition event. Therefore, a new look-up table concept Five-Dimensional-Flamelet Generated Manifold, that accounts for an additional dimension (strain rate), has been developed and tested, giving promising results.

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