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International Journal of Automotive Technology > Volume 9(5); 2008 > Article
International Journal of Automotive Technology 2008;9(5): 523-534.
INVESTIGATION OF SOOT FORMATION IN DIESEL-GTL FUEL BLENDS UNDER QUIESCENT CONDITIONS
U. B. AZIMOV1, E. A. ROZIBOYEV1, K. S. KIM1, D. S. JEONG2, Y. G. LEE2, J. E. YUN3
1Chonnam National University
2KIMM
3Kangwon National University
ABSTRACT
In this study, a visual investigation of sprays and flames is performed and soot formation in Diesel-GTL fuel blends is studied in a specially designed quiescent constant-volume chamber under various ambient gas temperatures and O2 concentrations. Similar to the case of soot formation during diesel fuel combustion, the sooting zone during the mixing-controlled combustion of Diesel-GTL blends is located in the leading portion of the jet boundaries. It was also determined that auto-ignition delay and soot concentration decrease with the increase of GTL content in the fuel blend. Soot also decreases with lower O2 concentration, higher injection pressure and lower ambient gas temperature. The lack of soot formation at lower O2 concentrations and lower temperatures suggests that Diesel-GTL fuel blends can be successfully utilized in low-temperature diesel combustion technologies that are currently being developed. Furthermore, this mixing controlled combustion method with Diesel-GTL blends can be used to modulate various engine operation parameters, and therefore, to reduce simultaneously the formations of soot and NOx within a wide range of diesel engine loads.
Key Words: Diesel spray and combustion, Diesel-GTL fuel blends, GTL fuel properties, soot formation, shadowgraphs.
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