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Effect of Combustion System Parameters on DI Diesel Engine Performance and Exhaust Emissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 27, 2013 by SAE International in United States
Annotation ability available
Event: 8th SAEINDIA International Mobility Conference & Exposition and Commercial Vehicle Engineering Congress 2013 (SIMCOMVEC)
In Direct Injection (DI) diesel engines, combustion gets affected by change in in-cylinder air motion and Fuel injection system characteristics. Computational Fluid Dynamics (CFD) based models give detailed insight into the combustion phenomena. The present work investigates the effect of different combustion chamber geometries and fuel injection system parameters on engine emissions and performance aiming to improve trade-off between NOx and smoke. AVL FIRE CFD software is used in this work. Research engine having 9 liter capacity of heavy duty application has been selected for the study. Seven hole injector is used with mechanical fuel injection system having 1000 bar maximum pressure capability. Inputs required to model complex combustion process in the AVL FIRE are derived from one dimensional engine simulation software AVL BOOST. Experimental data required for making simulation models has been collected using experimental set up compliant to standards ISO 8178 which has been designed for off-road application. A basic reentrant bowl modeled and meshed in the software. After matching the simulation and experimental results of base cavity; flow and local emission generation phenomena have been studied. Various cavity shapes have been designed by maintaining the same cavity volume. Designed cavities simulated in the AVL FIRE. Combustion chamber giving the best results used further to study the effect of fuel injection system parameters. Best results obtained from combustion chamber shape and fuel injection system combination verified experimentally. This study reveals approach of using engine simulation tools in improving fuel economy and engine out emissions.
CitationKamat, P., Aghav, Y., Gokhale, N., Helchel, V. et al., "Effect of Combustion System Parameters on DI Diesel Engine Performance and Exhaust Emissions," SAE Technical Paper 2013-01-2745, 2013, https://doi.org/10.4271/2013-01-2745.
- Piexoto Vinicious Combustion Optimization of a Diesel Engine with EGR system using 1D and 3D simulation tools ECM 2009 fourth european combustion conference 2009
- De Risi A. , Manieri D. F. and Laforgia D. A Theoretical Investigation on the Effects of Combustion Chamber Geometry and Engine Speed on Soot and NOx Emissions ASME 1999
- de Risi , A. , Donateo , T. , and Laforgia , D. Optimization of the Combustion Chamber of Direct Injection Diesel Engines SAE Technical Paper 2003-01-1064 2003 10.4271/2003-01-1064
- Shi , Y. and Reitz , R. Assessment of Optimization Methodologies to Study the Effects of Bowl Geometry, Spray Targeting and Swirl Ratio for a Heavy-Duty Diesel Engine Operated at High-Load SAE Int. J. Engines 1 1 537 557 2008 10.4271/2008-01-0949
- Colin O. and Benkenida A. The 3-Zones Extended Coherent Flame Model (ECFM3Z) for Computing Premixed/Diffusion Combustion Oil and Gas Science - Rev. IFP 59 6 593 609 2009
- AVL FIRE Engine Simulation Reference Manuals 2009
- Bockhorn , H. Soot Formation in Combustion Mechanisms and Models Springer
- Lakshminarayanan P.A. , Aghav Y. V. Modeling Diesel Combustion 1st Springer 2009