Observation of stagnation-flow premixed-spray flame structure by high-speed imaging and local chemiluminescence measurement (Effects of oxygen concentration in gaseous phase on flame behavior)

Hiroyasu Saitoh, Fumiteru Akamatsu, Masashi Katsuki

Research output: Contribution to journalArticle


We conducted an experimental observation of polydisperse premixed-spray flames of kerosene in a stagnation flow. For monitoring behaviors of fuel droplet and flame we adopted laser sheet visualization consisting of a high-speed digital CCD camera and Ar-ion laser, and OH-radical and CH-band emissions detected from local region in the vicinity of propagating flame by using a light-collecting probe. Three flames with different oxygen concentration in gaseous phase (21%, 19% and 17%) were examined. These flames had the same initial droplet size-distribution measured by Phase Doppler Anemometry at the burner exit, and all the other experimental conditions were kept same except oxygen concentration. In the case of oxygen concentration of 21%, various shape of spray boundary was formed depending on time, and combustion reaction zone overlapped considerably with spray area. On the other hand, in the case of 17%, the flame showed relatively flat-shaped spray boundary. Furthermore, we compared these flame behaviors and structures with those of premixed-spray flames we had observed before.

Original languageEnglish
Pages (from-to)1943-1950
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Issue number684
Publication statusPublished - 2003 Aug



  • Chemiluminescence
  • Combustion
  • Flame propagation
  • Flame structure
  • Laser
  • Liquid fuel
  • Premixed-spray flame
  • Spray combustion
  • Stagnation flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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