Fractal analysis of turbulent premixed flames in closed combustion chamber (2nd report, cross-sectional structure near the chamber wall)

Sadami Yoshiyama, Yoshisuke Hamamoto, Eiji Tomita, Toshiaki Nishijima

Research output: Contribution to journalArticle

Abstract

The cross-sectional flame images were measured during the late stage of flame propagation in closed combustion chamber. The initial flame had larger wrinkles and the late flame had smaller structure as the flame propagated in the chamber. The fractal analysis of the flame boundaries was performed. The fractal dimension increased and inner cutoff scale decreased with the increase of mixture density. It was found that the fractal dimension is expressed as a function of the turbulence intensity, laminar burning velocity and mixture density during the flame propagation.

Original languageEnglish
Pages (from-to)1865-1870
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number647
Publication statusPublished - Jul 2000

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turbulent flames
premixed flames
Fractal dimension
combustion chambers
Combustion chambers
Fractals
flames
fractals
chambers
flame propagation
Turbulence
cut-off
turbulence

Keywords

  • Combustion
  • Fractal
  • Laser tomography
  • Premixed combustion
  • Premixed flame
  • Turbulent flame

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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AU - Yoshiyama, Sadami

AU - Hamamoto, Yoshisuke

AU - Tomita, Eiji

AU - Nishijima, Toshiaki

PY - 2000/7

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N2 - The cross-sectional flame images were measured during the late stage of flame propagation in closed combustion chamber. The initial flame had larger wrinkles and the late flame had smaller structure as the flame propagated in the chamber. The fractal analysis of the flame boundaries was performed. The fractal dimension increased and inner cutoff scale decreased with the increase of mixture density. It was found that the fractal dimension is expressed as a function of the turbulence intensity, laminar burning velocity and mixture density during the flame propagation.

AB - The cross-sectional flame images were measured during the late stage of flame propagation in closed combustion chamber. The initial flame had larger wrinkles and the late flame had smaller structure as the flame propagated in the chamber. The fractal analysis of the flame boundaries was performed. The fractal dimension increased and inner cutoff scale decreased with the increase of mixture density. It was found that the fractal dimension is expressed as a function of the turbulence intensity, laminar burning velocity and mixture density during the flame propagation.

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KW - Laser tomography

KW - Premixed combustion

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