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http://dx.doi.org/10.3795/KSME-B.2014.38.9.763

Basic Study of Spray-Behavior Characteristics of Emulsified Fuel  

Yeom, Jeong Kuk (Dept. of Mechanical Engineering, Dong-A Univ.)
Yoon, Jeong Hwan (Dept. of Mechanical Engineering, Dong-A Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.9, 2014 , pp. 763-771 More about this Journal
Abstract
As a preliminary study on the spray behavior characteristics of emulsified fuel, the fuel properties (viscosity, surface tension, and density) and evaporation characteristics of a fuel droplet were investigated. The emulsified fuel was made by mixing diesel and $H_2O_2$. In addition, the macroscopic spray behavior characteristics such as the spray penetrations and spray angles of the emulsified and diesel fuels were compared. The stirring condition of the emulsified fuel was a 9:1 mixture of the diesel fuel and the surfactant span 80. The mixing ratios for the hydrogen peroxide were set at EF2, EF12, EF22, EF32, EF42, EF52, EF62, EF72, EF82, and EF92. The injection pressures were set at 400, 600, 800, and 1000 bar. We found that as the mixing ratio of the hydrogen peroxide was increased from EF2 to EF52, the viscosity of the emulsified fuel increased. However, afterward, the viscosity of the emulsified fuel gradually decreased and approached the viscosity value of the diesel fuel. Therefore, generally oil-in-water emulsions were used for the hydrogen peroxide mixing ratios up to 52 (EF52), and water-in-oil emulsions were used for the hydrogen peroxide mixing ratios above 52. Finally, the spray behavior characteristics (spray penetration and spray angle) of the emulsified fuel were found to be almost independent of the mixing ratio.
Keywords
Diesel Engine; Emulsified Fuel; Oil in Water; Water in Oil; Student's t-Distribution;
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Times Cited By KSCI : 7  (Citation Analysis)
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