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Modeling of Soot Formation During DI Diesel Combustion Using a Multi-Step Phenomenological Model
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Predictive models of soot formation during Diesel combustion are of great practical interest, particularly in light of newly proposed strict regulations on particulate emissions. A modified version of the phenomenological model of soot formation developed previously has been implemented in KIVA-II CFD code. The model includes major generic processes involved in soot formation during combustion, i.e., formation of soot precursors, formation of surface growth species, soot particle nucleation, coagulation, surface growth and oxidation. The formulation of the model within the KIVA-II is fully coupled with the mass and energy balances in the system. The model performance has been tested by comparison with the results of optical in-cylinder soot measurements in a single cylinder Cummins NH Diesel engine. The predicted soot volume fraction, number density and particle size agree reasonably well with the experimental data. The analysis of soot formation process based on model predictions also indicates consistency with the experimental observations derived from laser-sheet imaging studies.
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Kazakov, A. and Foster, D., "Modeling of Soot Formation During DI Diesel Combustion Using a Multi-Step Phenomenological Model," SAE Technical Paper 982463, 1998, https://doi.org/10.4271/982463.Also In
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