Modifying an Intake Manifold to Improve Cylinder-to-Cylinder EGR Distribution in a DI Diesel Engine Using Combined CFD and Engine Experiments

Siewert, Robert M.; Krieger, Roger; Huebler, M. S.; Baruah, P. C.; Khalighi, Bahram; Weßlau, Markus

doi:10.4271/2001-01-3685

Cited by 32 publications

(14 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Siewert et al developed a methodology to minimize EGR dispersion using CFD as a modelling tool to improve the intake mixing and then engine testing to compare the exhaust emissions for each configuration [15]. A CFD technique was also used by Nandi et al [16] because they found that the available testing techniques were inadequate to make measurements of the actual EGR distribution.…”

Section: Introductionmentioning

confidence: 99%

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Luján

Climent

Plá

et al. 2015

Applied Thermal Engineering

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Luján

Climent

Plá

et al. 2015

Applied Thermal Engineering

View full text Add to dashboard Cite

show abstract

“…In a study of Siewert et al [5], an intake manifold for a passenger car was improved in terms of EGR and air mixing, using both experimental and computational methods. It was shown that they can be used to complement each other.…”

Section: Introductionmentioning

confidence: 99%

Modeling of EGR Mixing in an Engine Intake Manifold Using LES

Sakowitz

Reifarth

Mihăescu

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°1, et téléchargeable ici D o s s i e rDOSSIER Edited by/Sous la direction de : C. Angelberger IFP Energies nouvelles International Conference / Les Rencontres Scientifiques d'IFP Energies nouvelles LES4ICE 2012 -Large Eddy Simulation for Internal Combustion Engine FlowsLES4ICE 2012 -La simulation aux grandes échelles pour les écoulements dans les moteurs à combustion interne Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014) Re´sume´-Mode´lisation du me´lange de EGR dans la tubulure d'admission a`l'aide de la technique de LES -Nous e´tudions le processus de me´lange des gaz d'e´chappement avec l'air dans les moteurs ac ombustion interne. Dans ce but, une simulation des grandes e´chelles (LES, Large Eddy Simulations) de l'e´coulement compressible dans la tubulure d'admission d'un moteur Diesel ag rosse cylindre´e comptant 6 cylindres est re´alise´e. Le taux de recirculation des gaz d'e´chappement (EGR, Exhaust Gas Recirculation) est conside´re´comme un scalaire passif. Les re´sultats obtenus sont valide´s a`l'aide des mesures du taux de EGR effectue´es sur un moteur avec une sonde de mesure de CO 2 . Les conditions aux limites de l'e´coulement pulsatoire sont de´duites de simulations unidimensionnelles et de mesures de pression effectue´es sur le moteur. La qualite´du me´lange est e´value´e a`partir de la re´partition d'un cylindre a`l'autre et des moyennes quadratiques spatiales calcule´es au niveau des sections de sortie. Diffe´rentes me´thodes sont utilise´es pour le calcul des quantite´s moyenne´es. Les re´sultats montrent que les e´volutions spatiales et temporelles de EGR sont diffe´rentes d'un cylindre a`l'autre. La distribution de EGR dans l'orifice d'entre´e du cylindre n'est pas uniforme. Ces facteurs impliquent que les moyennes temporelles ne devraient pas eˆtre utilise´es pour de´crire l'e´volution de la teneur en EGR. De plus, les pulsations de l'e´coulement, au niveau de l'orifice d'entre´e de EGR, ont une forte influence sur la distribution de EGR. En comparant les re´sultats de simulations LES avec les re´sultats expe´rimentaux, nous montrons que les simulations LES permettent une meilleure et plus approfondie compre´hension du processus de me´lange lors d'e´tudes de tels e´coulements turbulents et pulsatoires.Abstract -Modeling of EGR Mixing in an Engine Intake Manifold Using LES -We investigate the mixing process of exhaust gases with fresh air in Internal Combustion Engines (ICE). For this purpose, the flow in an inlet manifold of a six-cylinder heavy-duty Diesel engine is computed using compressible Large Eddy Simulations (LES). The Exhaust Gas Recirculation (EGR) concentration is modeled as a passive scalar. The results are validated by on-engine measurements of the EGR concentration using CO 2 -probes. The boundary conditions for the highly pulsating flow are taken partly from one-dimensional simulations, partly from pressure measurements on the ...

show abstract

“…This phenomenon has been studied by various researchers [16][17][18][19][20][21][22][23][24]. By measuring CO 2 instantaneous concentration at each inlet port during the intake stroke owing to mid-infrared laser absorption spectroscopy, Green [16] has demonstrated that even when operating at a steady condition, the engine's EGR system can produce large temporal variations in the EGR concentration within the flow of fresh charge during the intake stroke, that are different for each cylinder.…”

Section: Introductionmentioning

confidence: 99%

“…By measuring CO 2 instantaneous concentration at each inlet port during the intake stroke owing to mid-infrared laser absorption spectroscopy, Green [16] has demonstrated that even when operating at a steady condition, the engine's EGR system can produce large temporal variations in the EGR concentration within the flow of fresh charge during the intake stroke, that are different for each cylinder. Furthermore, CFD analyses [17][18][20][21] have demonstrated that a standard engine's EGR system results in a highly stratified concentration field within the inlet manifold. Many experimental and numerical studies [17,19,[23][24] have proposed improved inlet manifolds or air-EGR connections in order to improve cylinder-to-cylinder EGR distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, CFD analyses [17][18][20][21] have demonstrated that a standard engine's EGR system results in a highly stratified concentration field within the inlet manifold. Many experimental and numerical studies [17,19,[23][24] have proposed improved inlet manifolds or air-EGR connections in order to improve cylinder-to-cylinder EGR distribution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of EGR unequal distribution from cylinder to cylinder on NOx–PM trade-off of a HSDI automotive Diesel engine

Maiboom

Tauzia

Hétet

2009

Applied Thermal Engineering

View full text Add to dashboard Cite

The influence of cylinder-to-cylinder variation in EGR distribution on the NOx-PM trade-off (while varying EGR rate) is studied on an automotive high-speed direct injection Diesel engine. Experiments have been conducted on an engine test bench with and without air-EGR mixer and demonstrate that variations in cylinder-to-cylinder EGR distribution results in a deteriorated NOx-PM trade-off (increased NOx emissions level at a given PM emissions level, or increased PM emissions level at a given NOx emissions level) compared to the well mixed configuration with equal EGR rate for all the cylinders. A qualitative study as well an original experiment is conducted to explain this emissions increase induced by unequal distribution of EGR. When recirculating hot exhaust gases, the emissions increase is due to cylinder-to-cylinder variations in intake gas composition and temperature.Keywords: Diesel engine; pollutant emissions; exhaust gas recirculation (EGR); unequal cylinder-to-cylinder EGR distribution; EGR maldistribution; NOx-PM trade-off

show abstract

Modifying an Intake Manifold to Improve Cylinder-to-Cylinder EGR Distribution in a DI Diesel Engine Using Combined CFD and Engine Experiments

Cited by 32 publications

References 6 publications

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Exhaust gas recirculation dispersion analysis using in-cylinder pressure measurements in automotive diesel engines

Modeling of EGR Mixing in an Engine Intake Manifold Using LES

Influence of EGR unequal distribution from cylinder to cylinder on NOx–PM trade-off of a HSDI automotive Diesel engine

Contact Info

Product

Resources

About