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Titre: | CFD analysis of hydrogen injection pressure and valve profile law effects on backfire and pre- ignition phenomena in hydrogen-diesel dual fuel engine |
Auteur(s): | Menaa, Abdenour Lounici, M.S. Amrouche, F. Loubar, K. Kessal, M. |
Mots-clés: | Hydrogen-diesel dual fuel engine Hydrogen TMI system Hydrogen injection parameters Valve lift law CFD analysis |
Date de publication: | 2019 |
Editeur: | Elsevier |
Collection/Numéro: | International Journal of Hydrogen Energy/ Vol. 44, n° 18 (2019);pp. 9408-9422 |
Résumé: | This paper focuses on optimizing the hydrogen TMI (timed manifold injection) system
through valve lift law and hydrogen injection parameters (pressure, injection inclination
and timing) in order to prevent backfire phenomena and improve the volumetric efficiency
and mixture formation quality of a dual fuel diesel engine operating at high load and high
hydrogen energy share. This was achieved through a numerical simulation using CFD code
ANSYS Fluent, developed for a single cylinder hydrogen-diesel dual fuel engine, at constant
engine speed of 1500 rpm, 90% of load and 42.5% hydrogen energy share. The developed
tool was validated using experimental data. As a results, the operating conditions of
maximum valve lift ¼ 10.60 mm and inlet valve closing ¼ 30 CA ABDC (MVL10 IVC30)
prevent the engine from backfire and pre-ignition, and ensure a high volumetric efficiency.
Moreover, a hydrogen start of injection of 60 CA ATDC (HSOI60) is appropriate to provide a
pre-cooling effect and thus, reduce the pre-ignition sources and helps to quench any hot
residual combustion products. While, the hydrogen injection pressure of 2.7 bar and an
inclination of 60 , stimulate a better quality of hydrogen-air mixture. Afterwards, a com-
parison between combustion characteristics of the optimized hydrogen-diesel dual fuel
mode and the baseline (diesel mode) was conducted. The result was, under dual fuel mode
there is an increase in combustion characteristics and NOx emissions as well as a decrease
in CO2 emissions. For further improvement of dual fuel mode, retarding diesel start of
injection (DSOI) strategy was used. |
URI/URL: | https://www.sciencedirect.com/science/article/abs/pii/S0360319919307384?via%3Dihub http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/7779 |
Collection(s) : | Publications Internationales
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