Title: A new advanced approach to the design of combustion chambers in diesel engines

Authors: Arturo De Risi, Teresa Donateo, Domenico Laforgia

Addresses: CREA Department of Engineering for Innovation, University of Lecce, via per Arnesano 73100, Lecce, Italy. ' CREA Department of Engineering for Innovation, University of Lecce, via per Arnesano 73100, Lecce, Italy. ' CREA Department of Engineering for Innovation, University of Lecce, via per Arnesano 73100, Lecce, Italy

Abstract: An innovative methodology aimed at reducing emissions and improving fuel consumption has been developed for the design of internal combustion engines. The method allows the design of new combustion chambers by means of a fully automated procedure based on computational fluid dynamics (CFD) simulations, genetic algorithms and clustering. Four different engine operating conditions, i.e. load and speed values, were considered in the design of the combustion chamber. The results of the optimisation were used to understand the effect of the five geometrical parameters on the mechanism of formations of soot and NO_x by analysing the distribution of temperature and equivalence ratio within the optimised chambers.

Keywords: computational fluid dynamics; CFD; combustion chamber design; engine design; genetic algorithm; optimisation; diesel engines; vehicle emissions; clustering; simulation.

DOI: 10.1504/IJVD.2006.009667

International Journal of Vehicle Design, 2006 Vol.41 No.1/2/3/4, pp.165 - 187

Published online: 04 May 2006 *

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