Computation of mixing processes related to EGR
2011 (English)In: Proceedings of the 7th International on Turbulence and Shear Flow Phenomena, 2011Conference paper (Refereed)
Turbulent mixing processes related to the application of exhaust gas recirculation (EGR) in internal combustion engines are investigated using different turbulencemodels, i.e. RANS and LES. First, the mixing process in a simplified geometry, a T-junction with circular cross-sections, is considered under steady and pulsating in-flow conditions. The focus lies on the evaluation of the applied models and their effect on the mixing under the given flow conditions. The same turbulence models are then applied to a Diesel engine inlet manifold. It is shown that the EGR distribution to the different cylinders is non-uniformand hence affecting the total emissions from the engine. The non-uniformity of the EGR concentration implies also that the smoothing effect of the URANS model may not be adequate for determining the local temporaland spatial-EGR distribution at the cylinder intakes.
Place, publisher, year, edition, pages
Engineering and Technology Applied Mechanics
IdentifiersURN: urn:nbn:se:kth:diva-48348OAI: oai:DiVA.org:kth-48348DiVA: diva2:457400
QC 201111172011-11-172011-11-172011-11-17Bibliographically approved