Numerical simulation of soot formation and oxidation in diesel engines
A linked ignition-soot formation global kinetic model has been developed and adapted to the extended code CONCHAS-SPRAY. The so-called shell model, which was successful in the representation of the ignition global kinetics, has been used. Mass balanced reactions for the overall product path, soot formation and soot oxidation have been introduced as high-temperature global kinetics. The feature to generate soot was linked to a stable hydrocarbon intermediate species typical for ignition. The soot surface growth rate was determined by experimental data of final soot volume fraction given by Wagner et al. for premixed flames. The soot oxidation rate was represented by the Lee et al. formula. Turbulent transport properties were calculated with the help of the k-epsilon model. The numerical predictions of the soot concentration level, generation of soot and oxidation, as well as secondary soot formation at the spray axis were found to be in qualitative agreement with known experimental data.
Bibliographic Reference: Paper presented: SAE Congress, Detroit (US), February 1993
Availability: Available from (1) as Paper EN 37197 ORA
Record Number: 199211341 / Last updated on: 1994-11-29
Original language: en
Available languages: en