large-eddy simulation of diesel spray combustion with exhaust gas recirculation
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ID: 164970
2013
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Abstract
A Large-Eddy Simulation (LES) study of the transient combustion in the spray H experiment
investigated in the frame of the Engine Combustion Network (ECN) is presented. Combustion
is modeled using a LES formulation of the ADF-PCM approach, the principle of which is to
tabulate approximated diffusion flames based on the flamelet equation to account for
complex chemical effects. The liquid phase is resolved with an Eulerian mesoscopic
approach coupled with the DITurBC model for the injection.
The structure of the combustion resulting from the n-heptane liquid fuel jet is
investigated and compared to the literature. A very good reproduction of experimental
findings by the presented LES approach is reported for small EGR rates. Albeit the
qualitative effect of increasing the EGR rate is captured, the quantitative quality of the
LES predictions deteriorates with increasing EGR rate. One possible explanation for this
poor reproduction of EGR effects might be related to the fact that the used semi-detailed
scheme was not validated for high EGR rates.
| Reference Key |
j.2013oillarge-eddy
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|---|---|
| Authors | ;Tillou J.;Michel J.-B.;Angelberger C.;Bekdemir C.;Veynante D. |
| Journal | addiction (abingdon, england) |
| Year | 2013 |
| DOI |
10.2516/ogst/2013139
|
| URL | |
| Keywords |
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