TY - JOUR
T1 - Modeling diesel combustion with tabulated kinetics and different flame structure assumptions based on flamelet approach
AU - Lucchini, Tommaso
AU - Pontoni, Daniel
AU - D’Errico, Gianluca
AU - Somers, Bart
PY - 2020/1/1
Y1 - 2020/1/1
N2 - 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.
AB - 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.
KW - Approximated Diffusion Flamelet
KW - combustion modeling
KW - Computational fluid dynamics
KW - diesel
KW - Five-Dimensional-Flamelet Generated Manifold
KW - Flamelet Generated Manifold
KW - Spray A
UR - http://www.scopus.com/inward/record.url?scp=85070272590&partnerID=8YFLogxK
U2 - 10.1177/1468087419862945
DO - 10.1177/1468087419862945
M3 - Article
AN - SCOPUS:85070272590
VL - 21
SP - 89
EP - 100
JO - International Journal of Engine Research
JF - International Journal of Engine Research
SN - 1468-0874
IS - 1
ER -