Discussion of a Wrinkled Laminar Flamelet Model in a Diffusion Flame in Grid Turbulence

Hiroyasu Manako, Toshihisa Ueda, Masahiko Mizomoto

Research output: Contribution to journalArticle

Abstract

The temperature has been measured in a field in which laminar hydrogen (6.0 m/s at the center of a burner exit) was injected into a co-flowing air stream (6.0 m/s) with some kinds of grid turbulence. It is shown that the ratio of a laminar flame length to the turbulent one is proportional to the turbulent Reynolds number, Re., (integral scale is considered a characteristic length) in the measured extent (Rel≤ 1 000), and therefore that the integral scale of a reactant flow is an important parameter for the flames in this paper. The width of a flame displacement is estimated from the temperature profiles when the flame is assumed to be a wrinkled laminar flamelet. The width is also measured directly by a flow visualization method. Both the widths obtained by the two different methods agree well with each other. This fact indicates that the turbulent flame in this paper can be treated as a wrinkled laminar flamelet.

Original languageEnglish
Pages (from-to)3080-3086
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume56
Issue number530
DOIs
Publication statusPublished - 1990
Externally publishedYes

Fingerprint

diffusion flames
flames
Turbulence
turbulence
grids
Flow visualization
Fuel burners
Reynolds number
turbulent flames
flow visualization
burners
temperature profiles
Hydrogen
Temperature
Air
air
hydrogen
temperature

Keywords

  • Diffusion Combustion
  • Flame
  • Integral Scale
  • Wrinkled Laminar Flamelet Grid Turbulence

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Discussion of a Wrinkled Laminar Flamelet Model in a Diffusion Flame in Grid Turbulence. / Manako, Hiroyasu; Ueda, Toshihisa; Mizomoto, Masahiko.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 56, No. 530, 1990, p. 3080-3086.

Research output: Contribution to journalArticle

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AB - The temperature has been measured in a field in which laminar hydrogen (6.0 m/s at the center of a burner exit) was injected into a co-flowing air stream (6.0 m/s) with some kinds of grid turbulence. It is shown that the ratio of a laminar flame length to the turbulent one is proportional to the turbulent Reynolds number, Re., (integral scale is considered a characteristic length) in the measured extent (Rel≤ 1 000), and therefore that the integral scale of a reactant flow is an important parameter for the flames in this paper. The width of a flame displacement is estimated from the temperature profiles when the flame is assumed to be a wrinkled laminar flamelet. The width is also measured directly by a flow visualization method. Both the widths obtained by the two different methods agree well with each other. This fact indicates that the turbulent flame in this paper can be treated as a wrinkled laminar flamelet.

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