THERMAL SCIENCE

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Riad Hadjab

,

Mahfoud Kadja

online first only

Numerical investigation of natural gas feasibility in a direct injection heavy-duty diesel engine

ABSTRACT
In the present study, numerical simulations were performed on a direct injection heavy-duty diesel engine. Methane, which is the predominant component in natural gas, was chosen as the fuel. The simulations involved five exhaust gas recirculation ratios (0%, 10%, 20%, 25%, and 30%) to examine their effect on engine performance, NOx, and soot emissions. The numerical results were compared with existing experimental measurements of a typical diesel engine without exhaust gas recirculation. A comparison of the numerical results of the four cases of exhaust gas recirculation ratios reveals that the 30% exhaust gas recirculation ratio achieves a significant reduction in NOx emissions without increasing soot emissions. Consequently, the engine meets the authorized emission standards without excessive performance degradation.
KEYWORDS
natural gas, diesel engine, NOx, soot, exhaust gas recirculation, fluent CFD
PAPER SUBMITTED: 2023-11-27
PAPER REVISED: 2024-05-09
PAPER ACCEPTED: 2024-05-14
PUBLISHED ONLINE: 2024-06-22
DOI REFERENCE: https://doi.org/10.2298/TSCI231127131H
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Numerical investigation of natural gas feasibility in a direct injection heavy-duty diesel engine