Fractal Dimension Growth Model for SI Engine Combustion

2004-01-1993

06/08/2004

Event
2004 SAE Fuels & Lubricants Meeting & Exhibition
Authors Abstract
Content
Time-resolved continuous images of wrinkling flame front cross-sections were acquired by a laser-light sheet technique in an optically accessible spark ignition engine. The test engine was operated at various engine speeds and compression ratios. The fractal dimension of the curve, D2, was measured in a time series for each cycle. Analysis of the data shows that as the flame propagates the fractal dimension, D2, is close to unity a short time after spark ignition and then increases. Examination of the relationship between the growth rate of the fractal dimension, ΔD2t, and D2 reveals that the higher D2 is, the lower ΔD2t becomes. An Empirical equation for ΔD2t was derived as a function of the ratio of the turbulence intensity to the laminar burning velocity and pressure. This model was tested in an SI engine combustion simulation, and results compared favorably with experimental data.
Meta TagsDetails
DOI
https://doi.org/10.4271/2004-01-1993
Pages
13
Citation
Suzuki, K., and Nishiwaki, K., "Fractal Dimension Growth Model for SI Engine Combustion," SAE Technical Paper 2004-01-1993, 2004, https://doi.org/10.4271/2004-01-1993.
Additional Details
Publisher
Published
Jun 8, 2004
Product Code
2004-01-1993
Content Type
Technical Paper
Language
English