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An improved formulation of the Bray-Moss-Libby (BML) model for SI engine combustion modelling

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conference contribution
posted on 04.09.2017 by Chathura P. Ranasinghe, Weeratunge Malalasekera
In this paper an improved version of the BML model has been developed so that it could be applied to wall-bounded combustion modelling, eliminating the wall flame acceleration problem. Based on the Kolmogorov-Petrovski-Piskunov (KPP) analysis and fractal theory, a new dynamic formulation has been proposed to evaluate the mean flame wrinkling scale making necessary allowance for spatial inhomogeneity of turbulence. A novel empirical correlation has been derived based on experimentally estimated flame image data to quantify the quenching rates near solid boundaries. The proposed modifications were then applied to simulate premixed combustion in two spark ignition engines with different operating conditions. Results show that the present improvements have been successful in eliminating the wall flame acceleration problem found with the original BML model, while accurately predicting the in-cylinder pressure rise, mass burn rates and heat release rates.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

MCS-10: Tenth Mediterranean Combustion Symposium, Naples, Italy

Citation

RANASINGHE, C.P. and MALALASEKERA, W., 2017. An improved formulation of the Bray-Moss-Libby (BML) model for SI engine combustion modelling. Presented at the Tenth Mediterranean Combustion Symposium (MCS-10), Naples, Italy, 17-21st September.

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

03/07/2017

Publication date

2017

Notes

This is a conference paper.

Language

en

Location

Naples, Italy.

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