Abstract
The cross-sectional images of turbulent premixed flames of homogeneous fuel-air mixture in an engine cylinder were obtained by a laser tomography, and the fractal characteristics were investigated. It was observed that in an engine cylinder under high pressure condition, the turbulent flame was a smaller and more complicated structure, comparing with that under the lower pressure condition in a closed combustion chamber. The fractal dimension increases with the increase of the turbulence intensity and mixture density. The fractal dimension is expressed as a function of the increase ratio of mixture density and the ratio of turbulence intensity to laminar burning velocity. The inner cutoff scale of turbulent flames is expressed as a function of Karlovitz number.
Original language | English |
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Pages (from-to) | 3479-3484 |
Number of pages | 6 |
Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
Volume | 64 |
Issue number | 626 |
DOIs | |
Publication status | Published - Oct 1998 |
Keywords
- Combustion
- Fractal
- Laser aided diagnostics
- Laser tomography
- Premixed combustion
- Premixed flame
- Spark ignition engine
- Turbulent flame
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering