Study of Geometrical Parameter Influence on Air/EGR Mixing

2003-01-1796

05/19/2003

Event
2003 JSAE/SAE International Spring Fuels and Lubricants Meeting
Authors Abstract
Content
The present work deals with the understanding and optimisation of air-EGR mixture phenomena since EGR strategy already showed its benefits on combustion and particularly on NOx emissions. Such benefits can be only observed with an accurate regulation system limiting EGR cylinder-to-cylinder maldistribution, otherwise a risk of opposite effect may appears (no NOx reduction with increasing of particulate emission).
Given the complexity to get EGR cylinder-to-cylinder distributions on « real » engine working conditions and to understand mixing process which occurs upstream cylinder head, a simplify bench has been built in co-operation with the Institute of Fluid Mechanics from Toulouse (IMFT) in order to characterise Air/EGR mixing owing to optical diagnostic (PIV, PLIF). EGR cylinder-to-cylinder distribution is also measured by a thermal method.
In order to improve knowledge on mixing process and to create a data base for further 3D unsteady CFD simulations, parametrical study was carried out concerning EGR rate, camshaft speed (600 rpm, 1200 rpm and 1500rpm) and geometrical parameters. Classification of studied configurations and analysis of their influence on mixture in manifold (somewhere representative of cylinder-to-cylinder distribution) is then proposed.
Meta TagsDetails
DOI
https://doi.org/10.4271/2003-01-1796
Pages
23
Citation
William, J., Dupont, A., Bazile, R., and Marchal, M., "Study of Geometrical Parameter Influence on Air/EGR Mixing," SAE Technical Paper 2003-01-1796, 2003, https://doi.org/10.4271/2003-01-1796.
Additional Details
Publisher
Published
May 19, 2003
Product Code
2003-01-1796
Content Type
Technical Paper
Language
English