This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Flame-Kernel Model for Analysis of Fiber-Optic Instrumented Spark Plug Data
Annotation ability available
Sector:
Language:
English
Abstract
A flame-kernel model is formulated for the analysis of data obtained using a recently developed spark plug equipped with fiber-optic flame-arrival detectors. The detectors measure the elapsed time from ignition to flame arrival at the detector locations for each engine cycle. The model, which assumes a flame kernel of elliptical cross section undergoing growth and convective displacement at constant rates, is used to estimate those rates from cycle-resolved measurements. It is shown that convection-rate estimation, ostensibly an interpolation of detector signals, in some cases involves an extrapolation that is sensitive to model assumptions. Implications concerning experimental procedure and data interpretation are discussed.
Authors
Citation
Kerstein, A. and Witze, P., "Flame-Kernel Model for Analysis of Fiber-Optic Instrumented Spark Plug Data," SAE Technical Paper 900022, 1990, https://doi.org/10.4271/900022.Also In
References
- Witze P. O. Hall M. J. Wallace J. S. “Fiber-Optic Instrumented Spark Plug for Measuring Early Flame Development in Spark Ignition Engines,” SAE Paper 881638 1988
- Keck J. C. Heywood J. B. Noske G. “Early Flame Development and Burning Rates in Spark Ignition Engines and Their Cyclic Variability,” Trans. SAE, Reciprocating Engines-Spark Ignition and Diesel 96 162 1987
- Jefferson T. H. “TJMAR1-A Fortran Subroutine for Nonlinear Least Squares Parameter Estimation,” Sandia National Laboratories Report SLL-73-0305 1974
- Witze P. O. Hall M. J. Bennett M. J. “Cycle-Resolved Measurements of Flame Kernel Growth and Motion Correlated with Combustion Duration,” 1990 SAE International Congress and Exposition Detroit February 1990