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Modélisation quasi-dimensionnelle multizone de la phase de combustion dans un moteur à essence.

Communication avec acte
Author
KAPRIELIAN, Leslie
133641 Technocentre Renault [Guyancourt]
DEMOULIN, Marc
133641 Technocentre Renault [Guyancourt]
CINNELLA, Paola
ccDARU, Virginie
134975 Laboratoire de Dynamique des Fluides [DynFluid]

URI
http://hdl.handle.net/10985/7435
Date
2013

Abstract

Quasi-dimensional models are needed in early design stages to evaluate engines sizing. They are based on principles of Thermodynamics and experimental correlations. Here, we improve the accuracy of the classical quasi-dimensional two-zone model by means of two successive modi cations. First, a third zone is added near the walls : in this zone, the gases burn more slowly due to heat losses to the walls. It allows to correctly simulate the attenuation of the combustion when the ame comes near the walls.Secondly, a multi-zone model is built to take into account temperature and concentration gradients in the ame. The models are validated by comparing heat release rates distributions predicted by the two-zone, the three-zone and the multi-zone models against experimental data.

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