Macroscopic flame structure in a premixed-spray burner (formation and disappearance processes of droplet clusters and two-stage flame structure)

Shohji Tsushima, Hiroyasu Saitoh, Fumiteru Akamatsu, Masashi Katsuki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In an attempt to elucidate formation and disappearance processes of droplet clusters in spray flames, simultaneous measurements consisting of laser tomography and flame chemiluminescence detection are applied to a premixed-spay burner. The smart combination of measurements provides time-series data-set serving for better understanding of spray flames, which essentially contains inhomogeneity in space and time. It is revealed that preferential flame propagation through a premixed-spray stream plays a significant role in creating droplet clusters and that droplet clusters formed in this manner evanesces from their outer boundaries. Those observation confirms that the premixed-spray flame comprises both premixed-mode flame in upstream region and diffusion-mode flame in downstream region, respectively, i.e., two-stage flame structure previously reported for spray flames stabilized in either counter or stagnation flows.

Original languageEnglish
Pages (from-to)616-623
Number of pages8
JournalJSME International Journal, Series B: Fluids and Thermal Engineering
Volume44
Issue number4
DOIs
Publication statusPublished - 2001 Nov 1

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Keywords

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

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

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