Influence of low-temperature combustion and dimethyl ether-diesel blends on performance, combustion, and emission characteristics of common rail diesel engine: a CFD study

Environmental Science and Pollution Research International
Venkatesh Tavareppa LamaniKumar Gottekere Narayanappa

Abstract

Due to presence of more oxygen, absence of carbon-carbon (C-C) bond in chemical structure, and high cetane number of dimethyl ether (DME), pollution from DME operated engine is less compared to diesel engine. Hence, the DME can be a promising alternative fuel for diesel engine. The present study emphasizes the effect of various exhaust gas recirculation (EGR) rates (0-20%) and DME/Diesel blends (0-20%) on combustion characteristics and exhaust emissions of common rail direct injection (CRDI) engine using three-dimensional computational fluid dynamics (CFD) simulation. Extended coherent flame model-3 zone (ECFM-3Z) is implemented to carry out combustion analysis, and k-ξ-f model is employed for turbulence modeling. Results show that in-cylinder pressure marginally decreases with employing EGR compared to without EGR case. As EGR rate increases, nitrogen oxide (NO) formation decreases, whereas soot increases marginally. Due to better combustion characteristics of DME, indicated thermal efficiency (ITE) increases with the increases in DME/diesel blend ratio. Adverse effect of EGR on efficiency for blends is less compared to neat diesel, because the anoxygenated region created due to EGR is compensated by extra oxygen present in DM...Continue Reading

References

Feb 11, 2014·Environmental Science and Pollution Research International·Yacine Rezgui, Miloud Guemini

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Citations

Aug 26, 2017·Environmental Science and Pollution Research International·Venkatesh Tavareppa LamaniKumar Narayanappa Gottekere
Jan 18, 2020·Environmental Science and Pollution Research International·Chunhua SunFeng Zhou
Oct 1, 2018·Environmental Science and Pollution Research International·Ashok BragadeshwaranMuhammad Usman Kaisan
Jan 27, 2019·Environmental Science and Pollution Research International·Senthilkumar Masimalai, Arulselvan Subramaniyan

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