Effect of multiple injection strategies on emissions and performance in the Wärtsilä 6L 46 marine engine. A numerical approach
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Effect of multiple injection strategies on emissions and performance in the Wärtsilä 6L 46 marine engine. A numerical approachData
2019-01-01Cita bibliográfica
Lamas, M.I., Rodríguez, J.D.D., Castro-Santos, L., Carral, L.M., 2019. Effect of multiple injection strategies on emissions and performance in the Wärtsilä 6L 46 marine engine. A numerical approach. Journal of Cleaner Production 206, 1–10. https://doi.org/10.1016/j.jclepro.2018.09.165
Resumo
[Abstract] The present paper proposes a Computational Fluid Dynamics model to analyze the operation cycle and exhaust gas composition in a four-stroke marine diesel engine, the Wärtsilä 6L 46. Once validated, the numerical model was employed to study the influence of several pre-injection parameters such as pre-injection rate, duration, starting instant and number of pre-injections. The purpose is to reduce consumption and emissions, especially nitrogen oxides, due to the current increasingly restrictive legislation. It was found that the fuel injection is a critical factor influencing combustion and emission characteristics. Important nitrogen oxides emission reductions were obtained for the parameters analyzed. Particularly, a 31.9% nitrogen oxides reduction was obtained using 20% pilot injection, 65.7% advancing 4° the pre-injection start angle, 20.1% shorting 4° the pre-injection duration and 36.7% using 4 pre-injections. A slight increment of hydrocarbons, carbon monoxide and consumption was obtained, lower than 5% for almost all the cases analyzed, and a negligible effect on carbon dioxide emissions.
Palabras chave
Diesel engine
Emissions
Injection
Computational fluid dynamics (CFD)
Emissions
Injection
Computational fluid dynamics (CFD)
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CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
ISSN
0959-6526