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An experimental investigation of the breakup characteristics of secondary atomization of emulsified fuel droplet

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  • Watanabe, Hirotatsu
  • Suzuki, Yoshiyuki
  • Harada, Takuji
  • Matsushita, Yohsuke
  • Aoki, Hideyuki
  • Miura, Takatoshi

Abstract

In this study, the breakup characteristics of secondary atomization of an emulsified fuel droplet were investigated with a single droplet experiment. In the single droplet experiment, the emulsified fuel droplet suspended from a fine wire was inserted into an electric furnace, and then secondary atomization behavior was observed using a high-speed video camera. Moreover, a mathematical model to calculate the generated water vapor at micro-explosion was proposed by using the mass and energy conservation equations under some assumptions. In the proposed model, that can be calculated by using the inner droplet temperature history at micro-explosion. As a result, puffing and micro-explosion occurred even when the fine ceramics fiber was used. The proposed model showed that about 50–70wt% of water in the emulsified fuel changed to water vapor instantaneously at the occurrence of micro-explosion. The mass of water necessary for micro-explosion was shown. The breakup time was closely related to the superheat temperature just before the occurrence of micro-explosion.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:2:p:806-813
    DOI: 10.1016/j.energy.2009.08.021
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    Cited by:

    1. Anufriev, I.S., 2021. "Review of water/steam addition in liquid-fuel combustion systems for NOx reduction: Waste-to-energy trends," Renewable and Sustainable Energy Reviews, Elsevier, vol. 138(C).
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    3. Paweł Niszczota & Marian Gieras, 2021. "Impact of the Application of Fuel and Water Emulsion on CO and NOx Emission and Fuel Consumption in a Miniature Gas Turbine," Energies, MDPI, vol. 14(8), pages 1-15, April.
    4. Zhaowen Wang & Shang Wu & Yuhan Huang & Yulin Chen & Shuguo Shi & Xiaobei Cheng & Ronghua Huang, 2017. "Evaporation and Ignition Characteristics of Water Emulsified Diesel under Conventional and Low Temperature Combustion Conditions," Energies, MDPI, vol. 10(8), pages 1-14, July.
    5. Zhang, Yu & Huang, Ronghua & Huang, Yuhan & Huang, Sheng & Ma, Yinjie & Xu, Shijie & Zhou, Pei, 2018. "Effect of ambient temperature on the puffing characteristics of single butanol-hexadecane droplet," Energy, Elsevier, vol. 145(C), pages 430-441.
    6. 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.
    7. 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.
    8. Shen, Shiquan & Sun, Kai & Che, Zhizhao & Wang, Tianyou & Jia, Ming & Cai, Junqian, 2020. "Mechanism of micro-explosion of water-in-oil emulsified fuel droplet and its effect on soot generation," Energy, Elsevier, vol. 191(C).
    9. Dmitrii V. Antonov & Roman M. Fedorenko & Leonid S. Yanovskiy & Pavel A. Strizhak, 2023. "Physical and Mathematical Models of Micro-Explosions: Achievements and Directions of Improvement," Energies, MDPI, vol. 16(16), pages 1-16, August.
    10. 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.
    11. Jiao, Weizhou & Luo, Shuai & He, Zhen & Liu, Youzhi, 2017. "Emulsified behaviors for the formation of Methanol-Diesel oil under high gravity environment," Energy, Elsevier, vol. 141(C), pages 2387-2396.
    12. Vellaiyan, Suresh, 2020. "Combustion, performance and emission evaluation of a diesel engine fueled with soybean biodiesel and its water blends," Energy, Elsevier, vol. 201(C).
    13. Changchun Xu & Haengmuk Cho, 2021. "Effect of Methanol/Water Mixed Fuel Compound Injection on Engine Combustion and Emissions," Energies, MDPI, vol. 14(15), pages 1-14, July.
    14. Zhang, Wei & Chen, Zhaohui & Shen, Yinggang & Shu, Gequn & Chen, Guisheng & Xu, Biao & Zhao, Wei, 2013. "Influence of water emulsified diesel & oxygen-enriched air on diesel engine NO-smoke emissions and combustion characteristics," Energy, Elsevier, vol. 55(C), pages 369-377.
    15. 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.
    16. 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.
    17. Wang, Zhaowen & Shi, Shuguo & Huang, Sheng & Tang, Jie & Du, Tao & Cheng, Xiaobei & Huang, Ronghua & Chen, Jyh-Yuan, 2018. "Effects of water content on evaporation and combustion characteristics of water emulsified diesel spray," Applied Energy, Elsevier, vol. 226(C), pages 397-407.
    18. Mukhtar, M.N.A. & Hagos, Ftwi Y. & Noor, M.M. & Mamat, Rizalman & Abdullah, A. Adam & Abd Aziz, Abd Rashid, 2019. "Tri-fuel emulsion with secondary atomization attributes for greener diesel engine – A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 111(C), pages 490-506.
    19. Chen, Kang-Shin & Lin, Yuan-Chung & Hsieh, Lien-Te & Lin, Long-Full & Wu, Chia-Chieh, 2010. "Saving energy and reducing pollution by use of emulsified palm-biodiesel blends with bio-solution additive," Energy, Elsevier, vol. 35(5), pages 2043-2048.
    20. Wang, Jigang & Qiao, Xinqi & Ju, Dehao & Wang, Lintao & Sun, Chunhua, 2019. "Experimental study on the evaporation and micro-explosion characteristics of nanofuel droplet at dilute concentrations," Energy, Elsevier, vol. 183(C), pages 149-159.
    21. Han, Kai & Pang, Bo & Zhao, Changlu & Ni, Zhaojing & Qi, Zhengda, 2019. "An experimental study of the puffing and evaporation characteristics of acetone–butanol–ethanol (ABE) and diesel blend droplets," Energy, Elsevier, vol. 183(C), pages 331-340.
    22. Dmitrii V. Antonov & Roman M. Fedorenko & Pavel A. Strizhak, 2022. "Micro-Explosion Phenomenon: Conditions and Benefits," Energies, MDPI, vol. 15(20), pages 1-19, October.

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