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A Study of the Knocking Mechanism in Terms of Flame Propagation Behavior Based on 3D Numerical Simulations
ISSN: 1946-3936, e-ISSN: 1946-3944
Published April 20, 2009 by SAE International in United States
Citation: Teraji, A., Kakuho, A., Tsuda, T., and Hashizume, Y., "A Study of the Knocking Mechanism in Terms of Flame Propagation Behavior Based on 3D Numerical Simulations," SAE Int. J. Engines 2(1):666-673, 2009, https://doi.org/10.4271/2009-01-0699.
The aim of this study is to gain a better understanding of the mechanism of knocking with respect to flame propagation behavior based on 3D simulations conducted with the Universal Coherent Flamelet Model. Flame propagation behavior under the influence of in-cylinder flow was analyzed on the basis of the calculated results and experimental visualizations. Tumble and swirl flows were produced in the cylinder by inserting various baffle plates in the middle of the intake port. A comparison of the measured and calculated flame propagation behavior showed good agreement for various in-cylinder flow conditions. The results indicate that in-cylinder flow conditions vary the flame propagation shape from the initial combustion period and strongly influence the occurrence of knocking.