The Viscosity and Combustion Characteristics of Single-Droplet Water-Diesel Emulsion

Jonghan Won, Seung Wook Baek, Hyemin Kim and Hookyung Lee
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Jonghan Won: Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
Seung Wook Baek: Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
Hyemin Kim: Department of Aeronautical & Mechanical Design Engineering, Korea National University of Transportation, Daehak-ro 50, Chungju 27469, Korea
Hookyung Lee: Corporate R&D Institute, Doosan Heavy Industries and Construction, Yongin 16858, Korea

Energies, 2019, vol. 12, issue 10, 1-12

Abstract: Diesel fuel exhibits excellent combustion characteristics and stability. However, diesel use is becoming restricted because of its associated environmental problems. Fuel emulsification, which increases efficiency and reduces pollution, became the solution of environmental problem. In this study, five water:diesel emulsions with mass ratios (0.3, 0.6, 1.0, 1.2, and 1.5) via ultrasonication were synthesized with and without surfactant. The optimal water:diesel ratio (=1:1) of an emulsion containing the surfactant was found by analyzing fuel concentration, mixing time, and viscosity. The combustion characteristics of single-droplet optimal emulsions were studied through ignition delay, burning rate, and total droplet lifetime at high temperature (400–700 °C) and pressure (1–15 bar), and micro-explosion phenomenon was observed. Although the ignition delay of emulsion increased, the total lifetime of the emulsion droplet was lower than that of diesel under 5 bar, 600 °C condition.

Keywords: water-diesel emulsion; diesel; droplet; viscosity; combustion; micro-explosion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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