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

Author

Listed:
  • 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)

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.

Suggested Citation

  • Jonghan Won & Seung Wook Baek & Hyemin Kim & Hookyung Lee, 2019. "The Viscosity and Combustion Characteristics of Single-Droplet Water-Diesel Emulsion," Energies, MDPI, vol. 12(10), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:10:p:1963-:d:233442
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    References listed on IDEAS

    as
    1. Donggi Lee & Jonghan Won & Seung Wook Baek & Hyemin Kim, 2018. "Autoignition Behavior of an Ethanol-Methylcellulose Gel Droplet in a Hot Environment," Energies, MDPI, vol. 11(8), pages 1-11, August.
    2. Elsanusi, Osama Ahmed & Roy, Murari Mohon & Sidhu, Manpreet Singh, 2017. "Experimental Investigation on a Diesel Engine Fueled by Diesel-Biodiesel Blends and their Emulsions at Various Engine Operating Conditions," Applied Energy, Elsevier, vol. 203(C), pages 582-593.
    3. Reham, S.S. & Masjuki, H.H. & Kalam, M.A. & Shancita, I. & Rizwanul Fattah, I.M. & Ruhul, A.M., 2015. "Study on stability, fuel properties, engine combustion, performance and emission characteristics of biofuel emulsion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1566-1579.
    4. Zhang, Xiaoqing & Li, Tie & Wang, Bin & Wei, Yijie, 2018. "Superheat limit and micro-explosion in droplets of hydrous ethanol-diesel emulsions at atmospheric pressure and diesel-like conditions," Energy, Elsevier, vol. 154(C), pages 535-543.
    5. Won, Jonghan & Baek, Seung Wook & Kim, Hyemin, 2018. "Autoignition and combustion behavior of emulsion droplet under elevated temperature and pressure conditions," Energy, Elsevier, vol. 163(C), pages 800-810.
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    Cited by:

    1. Svetlana Kropotova & Pavel Strizhak, 2021. "Collisions of Liquid Droplets in a Gaseous Medium under Conditions of Intense Phase Transformations: Review," Energies, MDPI, vol. 14(19), pages 1-27, September.
    2. Olga Gaidukova & Pavel Strizhak, 2021. "Critical Conditions for the Ignition of a Gel Fuel under Different Heating Schemes," Energies, MDPI, vol. 14(21), pages 1-16, October.

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