Macroscopic flame structure in a premixed-spray burner (2nd report, flame propagation speed and droplet cluster disappearance speed)

Shohji Tsushima, Hiroyasu Saito, Fumiteru Akamatsu, Masashi Katsuki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Both flame propagation speed and droplet cluster disappearance speed in a premixed-spray burner system are experimentally investigated by image processing analysis in an effort to evaluate two-stage flame structure observed in the premixed-spray flame. It is confirmed that flame speed concerned with premixed-mode combustion in the spray flame is approximately 2.0 m/s in average while mean disapperance speed of droplet clusters, which are dominated by diffusion-controlled combustion-mode downstream of the flame, is evaluated as much as 0.45 m/s. Although both speed, Which are supposed to depend on local properties of the spray itself and flow conditions surrounding droplet clusters, are scattered in experiments, it was clarified that both characteristics of premixed-mode and diffusion-mode combustion in spray flames are of much difference in nature.

Original languageEnglish
Pages (from-to)2734-2739
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number650
Publication statusPublished - 2000 Oct
Externally publishedYes

Fingerprint

flame propagation
burners
Fuel burners
sprayers
flames
Image processing
image processing
Experiments

Keywords

  • Combustion
  • Droplet cluster
  • Flame propagation
  • Group combustion
  • Laser
  • Laser tomography
  • Liquid fuel
  • Spray flame

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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abstract = "Both flame propagation speed and droplet cluster disappearance speed in a premixed-spray burner system are experimentally investigated by image processing analysis in an effort to evaluate two-stage flame structure observed in the premixed-spray flame. It is confirmed that flame speed concerned with premixed-mode combustion in the spray flame is approximately 2.0 m/s in average while mean disapperance speed of droplet clusters, which are dominated by diffusion-controlled combustion-mode downstream of the flame, is evaluated as much as 0.45 m/s. Although both speed, Which are supposed to depend on local properties of the spray itself and flow conditions surrounding droplet clusters, are scattered in experiments, it was clarified that both characteristics of premixed-mode and diffusion-mode combustion in spray flames are of much difference in nature.",
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AU - Akamatsu, Fumiteru

AU - Katsuki, Masashi

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N2 - Both flame propagation speed and droplet cluster disappearance speed in a premixed-spray burner system are experimentally investigated by image processing analysis in an effort to evaluate two-stage flame structure observed in the premixed-spray flame. It is confirmed that flame speed concerned with premixed-mode combustion in the spray flame is approximately 2.0 m/s in average while mean disapperance speed of droplet clusters, which are dominated by diffusion-controlled combustion-mode downstream of the flame, is evaluated as much as 0.45 m/s. Although both speed, Which are supposed to depend on local properties of the spray itself and flow conditions surrounding droplet clusters, are scattered in experiments, it was clarified that both characteristics of premixed-mode and diffusion-mode combustion in spray flames are of much difference in nature.

AB - Both flame propagation speed and droplet cluster disappearance speed in a premixed-spray burner system are experimentally investigated by image processing analysis in an effort to evaluate two-stage flame structure observed in the premixed-spray flame. It is confirmed that flame speed concerned with premixed-mode combustion in the spray flame is approximately 2.0 m/s in average while mean disapperance speed of droplet clusters, which are dominated by diffusion-controlled combustion-mode downstream of the flame, is evaluated as much as 0.45 m/s. Although both speed, Which are supposed to depend on local properties of the spray itself and flow conditions surrounding droplet clusters, are scattered in experiments, it was clarified that both characteristics of premixed-mode and diffusion-mode combustion in spray flames are of much difference in nature.

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