Cunha, Baptiste et Seers, Patrice.
2025.
« Effect of EGR direct-injection on the resulting flow and stratification in a spark-ignition engine using CFD ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Exhaust gas recirculation (EGR) is widely implemented in internal combustion engines to reduce pollutant emissions. The traditional way of introducing EGR is by creating a homogeneous air-exhaust gas mixture in the engine intake system. In this paper a novel technique of EGR is studied numerically and is based on the direct injection of exhaust gases in the cylinder. Such an approach can create exhaust gases stratification which offers benefits compared to the traditional technique. To explore the capacity of the novel approach, 3D-CFD simulations were used. Results showed a high velocity EGR jet, emanating from the three EGR inlets, which crosses the cylinder and hits the junction piston-cylinder liner on the opposite side. The jet then continued its course creating a clear stratification of nitrogen inside the cylinder along the liner surface. Moreover, CFD results suggested a direct advantage of the proposed approach as a significant increase of turbulence (measured by TKE, turbulence intensity, and swirl ratio) is observed and persisted up to spark timing when compared to a homogeneous EGR approach.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Professeur: | Professeur Seers, Patrice |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 18 déc. 2025 15:09 |
| Dernière modification: | 18 déc. 2025 15:09 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32381 |
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