This study presents the developmental work of two reduced kinetic models, namely, methyl-cyclo-hexane (MCH) and pentanol. MCH is the representative of the cyclo-alkane component for diesel. Pentanol is used as a fuel additive to aid in emission reduction. The final 86-species MCH model and the final 55-species pentanol model are about 90% smaller than their respective detailed counterparts. Upon extensive validation exercises in zero-dimensional (0-D) kinetic simulations, the MCH model was integrated with the formerly derived models for linear (n-hexadecane) and branched (2,2,4,4,6,8,8-heptamethylnonane) alkanes to form a 144-species kinetic model, namely, D_144. The “reduced-prior-to-combination” approach was adopted in merging the fuel constituents. The D_144 model can be used as a surrogate model for diesel in numerical computational fluid dynamics (CFD) modelling. Successively, a 162-species model for diesel and alcohol mixtures, namely, DA_162, was formulated by integrating the alcohol chemistries of the pentanol model with the D_144 model. It was then applied in spray combustion simulations to evaluate the effects of the alcohol additive on the combustion and emission performances of diesel fuel under diesel-engine-like conditions. The results obtained showed that blending of alcohol additives with diesel has successfully reduced soot formation. The DA_162 model can potentially be used as a surrogate model in further investigation studies involving alcohol-diesel-fuelled engines.
Formulation of a Multicomponent Kinetic Model for Diesel-Alcohol Blends
Sae Int. J. Fuels Lubr
Sae International Journal of Fuels and Lubricants
Sae International Journal of Fuels and Lubricants ; 15 , 1 ; 43-72
2021-11-15
30 pages
Aufsatz (Konferenz)
Englisch
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