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Combustion of a single emulsion fuel droplet in a rapid compression machine

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  • Kim, Hyemin
  • Baek, Seung Wook

Abstract

The autoignition and combustion characteristics of a single water/n-decane emulsion droplet were examined using a rapid compression machine. A specific volume ratio of water was added to the n-decane, and a water-in-oil emulsion was formed by ultrasonication. The emulsion droplet was suspended at the tip of a fine thermocouple and placed at the center of the reaction chamber. The time evolutions of droplet temperature and diameter were observed. Droplet combustion was classified into four stages, and the characteristics of each stage varied little with the water volume ratio. Ignition delay increased monotonically with initial droplet diameter and water volume ratio. Increasing the water ratio boosted the intensity of micro explosions, while the rise in droplet temperature was hindered by the specific heat and latent heat of the water. The average burning rate was elevated when the initial droplet diameter increased. However, the burning rate was not affected much by the water volume ratio.

Suggested Citation

  • Kim, Hyemin & Baek, Seung Wook, 2016. "Combustion of a single emulsion fuel droplet in a rapid compression machine," Energy, Elsevier, vol. 106(C), pages 422-430.
    • Handle: RePEc:eee:energy:v:106:y:2016:i:c:p:422-430
    DOI: 10.1016/j.energy.2016.03.006
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    References listed on IDEAS

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    1. Watanabe, Hirotatsu & Suzuki, Yoshiyuki & Harada, Takuji & Matsushita, Yohsuke & Aoki, Hideyuki & Miura, Takatoshi, 2010. "An experimental investigation of the breakup characteristics of secondary atomization of emulsified fuel droplet," Energy, Elsevier, vol. 35(2), pages 806-813.
    2. Nguyen, Kim-Bao & Dan, Tomohisa & Asano, Ichiro, 2015. "Effect of double injection on combustion, performance and emissions of Jatropha water emulsion fueled direct-injection diesel engine," Energy, Elsevier, vol. 80(C), pages 746-755.
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    Cited by:

    1. 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.
    2. Paweł Niszczota & Maciej Chmielewski & Marian Gieras, 2022. "Fuel-Water Emulsion as an Alternative Fuel for Gas Turbines in the Context of Combustion Process Properties—A Review," Energies, MDPI, vol. 15(23), pages 1-21, November.
    3. Dhahad, Hayder A. & Chaichan, Miqdam T. & Megaritis, T., 2019. "Performance, regulated and unregulated exhaust emission of a stationary compression ignition engine fueled by water-ULSD emulsion," Energy, Elsevier, vol. 181(C), pages 1036-1050.
    4. Paweł Niszczota & Marian Gieras, 2021. "Effect of Adding Emulsifier to Fuel on Work Efficiency and Gas Turbine Emissions," Energies, MDPI, vol. 14(17), pages 1-15, August.

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