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Spray Characteristics of Biodiesel Fuel by Blending Bioethanol and Diesel Fuel in a Common Rail Injection System  

Park, Su-Han (Graduate School of Hanyang University)
Suh, Hyun-Kyu (Graduate School of Hanyang University)
Kim, Hyung-Jun (Graduate School of Hanyang University)
Lee, Chang-Sik (School of Mechanical Engineering, Hanyang University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.2, 2009 , pp. 82-89 More about this Journal
Abstract
In order to investigate the spray characteristics according to diesel and bioethanol blending with biodiesel fuel, macroscopic spray characteristics were analyzed from the comparison of the effect of the injection pressure, ambient pressure and density on the spray tip penetration and spray cone angle. In addition, spray atomization characteristics were studied with local and overall Sauter mean diameter (SMD) and the contour map of SMD distribution at various injection conditions. It was revealed that the spray tip penetration of biodiesel fuels blended with diesel and ethanol was shorter than that of an undiluted biodiesel fuel at low injection pressure. However, the difference of spray tip penetration among three test fuels reduces at a high injection pressure. Increase of the ambient gas density leads to the decrease of the spray tip penetration of three test fuels. When diesel and ethanol fuels add to an undiluted biodiesel fuel, spray cone angle increases due to the decrease of the fuel density at the same ambient pressure condition. On the other hand, the droplet mean diameter decreases due to the reduction of the kinematic viscosity and surface tension.
Keywords
Biodiesel; Spray tip penetration; Spray cone angle; Fuel atomization;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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