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Ignition Process of Diesel Spray Based on Behavior of Rotating Gliding Arc in Plasma Reformer

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Abstract

The design of efficient plasma reformers requires both efficient fuel conversion of fuel and chemical energy extraction. In this regard, liquid fuels provide the advantages of high gravimetric and volumetric energy densities, therefore yielding high energy; in particular, diesel is promising for use in plasma reformers. In this study, we investigated the ignition process in a diesel reformer driven by a rotating gliding arc using a high-speed camera. The locations of the flame kernel generated by the arc were clearly identified under different power conditions. At high power, the flame kernel was generated at the nozzle tip, which grew into a fully developed flame. This indicates that the period for fuel vaporization and mixing with air (which is a necessary step prior to chemical reactions and is typically longer than the characteristic chemical reaction time) is extremely short. Moreover, with low oxygen concentrations, we observed a rotating flame kernel. At low power, the flame kernel was generated at a distance from the nozzle tip and the arc. This result indicates that the generation mechanism of the flame kernel in the plasma reformer is not straightforward; flow and arc dynamics also influence the interactions between the arc and fuel droplets.

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Acknowledgements

This research was supported by Technology Development Program to Solve Climate Changes through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT (NRF-2019M1A2A2103681).

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  1. Seongil Choi and Hongjae Kang have contributed equally.

Authors and Affiliations

  1. Department of Plasma Engineering, Korea Institute of Machinery and Materials, 156, Gajeongbuk-ro, Yuseong-gu, Daejeon, 34103, Republic of Korea

    Seongil Choi, Hongjae Kang, Kwan-Tae Kim, Young-Hoon Song & Dae Hoon Lee

  2. School of Environment & Energy Mechanical Engineering, Korea University of Science and Technology, 217, Gajeong-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea

    Seongil Choi, Young-Hoon Song & Dae Hoon Lee

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  1. Seongil Choi
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  2. Hongjae Kang
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Correspondence to Dae Hoon Lee.

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Choi, S., Kang, H., Kim, KT. et al. Ignition Process of Diesel Spray Based on Behavior of Rotating Gliding Arc in Plasma Reformer. Plasma Chem Plasma Process 41, 1021–1037 (2021). https://doi.org/10.1007/s11090-021-10164-9

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