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Experimental Study on the Stabilization Mechanism of Diffusion Flames in a Curved Impinging Spray Combustion Field in a Narrow Region

Author

Listed:
  • Hideo Kawahara

    (Department of Shipping Technology, National Institute of Technology, Oshima College, 1091-1 Komatsu, Suo Oshima, Oshima, Yamaguchi 742-2193, Japan)

  • Konosuke Furukawa

    (Department of Shipping Technology, National Institute of Technology, Oshima College, 1091-1 Komatsu, Suo Oshima, Oshima, Yamaguchi 742-2193, Japan)

  • Koichiro Ogata

    (Department of Mechanical Engineering, National Institute of Technology, Oita College, 1666 Maki, Oita City 870-0152, Japan)

  • Eiji Mitani

    (SSC Co., Ltd., Tomomachi Ushiroji 26-216, Fukuyama, Hiroshima 720-0202, Japan)

  • Koji Mitani

    (SSC Co., Ltd., Tomomachi Ushiroji 26-216, Fukuyama, Hiroshima 720-0202, Japan)

Abstract

HVAF (High Velocity Air Flame) flame spraying can generate supersonic high-temperature gas jets, enabling thermal spraying at unprecedented speeds. However, there is a problem with the energy cost of this device. This study focused on combustors that used cheap liquid fuel (kerosene) as the fuel for HVAF. In this research, we have developed a compact combustor with a narrow channel as a heat source for the HVAF heat atomizer. Using this combustor, the stability of the flame formed in the combustor, the morphology of the flame, and the temperature behavior in the combustion chamber were investigated in detail. As a result, the magnitude of the swirling airflow had a great influence on the structure of the flame formed in the combustor, and the stable combustion range of the combustor could be determined. As the swirling air flow rate changes, the equivalent ratio of the entire combustor changes significantly, and the flame structure also transition from the premixed flame to the diffusion flame. From this study, it was confirmed that the temperature inside the combustor has great influence on the flame structure.

Suggested Citation

  • Hideo Kawahara & Konosuke Furukawa & Koichiro Ogata & Eiji Mitani & Koji Mitani, 2021. "Experimental Study on the Stabilization Mechanism of Diffusion Flames in a Curved Impinging Spray Combustion Field in a Narrow Region," Energies, MDPI, vol. 14(21), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7171-:d:670188
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