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Spray Charaeteristics and Exhaust Emission Tests far a Diesel Engine Using Emulsified Fuels  

서희준 (항공우주연구원)
오승묵 (한국기계연구원)
허환일 (충남대학교 항공우주공학과)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.10, no.4, 2002 , pp. 60-68 More about this Journal
Abstract
Experiments have been conducted to investigate the effects of emulsified fuels on the spray characteristics and exhaust emissions in a diesel engine. Four different fuels were examined : diesel, emulsified fuels with water contents which were varied with 13, 15, and l7wt%. Characteristics of fuel spray were measured by an optical method, PLLIF(planar liquid laser induced fluorescence). Compared to diesel fuel, emulsified fuels which had relatively high kinematic viscosity showed smaller spray angle and longer spray tip penetration. The qualitative droplet distributions of emulsified fuels showed worse atomization process than that of diesel fuel. As the water contents were increased, PM and NOx could be reduced simultaneously. It was specially noted that the emulsified fuel with l7wt% water content was found to be the best in reducing rates, NOx 30% and PM 40%.
Keywords
SW(Satuer Mean Diameter); PLLIF(Planar Liquid Laser Induced Fluorescence); Emulsified fuel; Dl3 mode test; NOx; Particulate matter;
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