Technical Paper
Modelling Medium Speed Diesel Engine Combustion, Soot and NOx-emission Formations
2000-06-19
2000-01-1886
The purpose of the present study was to model combustion, soot and NOx-emissions of a medium speed diesel engine using the modified KIVA-2 code. Assesment of the droplet vaporization, the soot formation and its oxidation models were also done regarding the medium speed diesel engine. Heavy fuel spray was modeled with the standard KIVA-2 chi-squared model including drag modification during droplet vaporization (the droplet distribution model), droplet vaporization with the high pressure Spalding and Abramzon&Sirignano models, combustion with the Magnussen EDC-model including a two step reaction mechanism, NOx formation with the extended Zeldovich model, soot formation with the modified Tesner&Magnussen model and soot oxidation with the EDC-model and Nagle and Strickland-Constable model (NSC). The RNG k-epsilon turbulence model was also implemented into the code. The Redlich-Kwong real gas equation of state and the formulation of Peng-Robinson fugacity coefficient equation were used.