Inderscience Publishers

Performance of a direct diesel engine using aviation fuels blended with biodiesel

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In this study, jet fuel (JF) and railroad fuel (D2) with SME blends (5%, 20%, 50%) were used in a four–cylinder, naturally aspirated, direct (DI) diesel engine. The engine was operated under full load and tested at various speeds to determine the engine's performance and exhaust emission characteristics. The experimental results show that as the SME ratio of the fuels increases, the break specific fuel consumption (BSFC) and exhaust temperature increase; the SME and its blends show a slight drop in engine performance. In this experiment, carbon monoxide (CO), carbon dioxide (CO

2

), nitrogen oxides (NO

x

) and smoke opacity values were measured for each fuel. The results of the emission tests revealed that the oxygen content of SME provided a significant reduction in CO and smoke opacity emissions. However, when the test engine was fuelled by SME and its blends, NO

x

emissions increased.

Keywords: alternative fuels, soybean oil methyl ester, diesel engines, jet fuel, aviation fuels, biodiesel, engine performance, exhaust emissions

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