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Exploring the Use of Multiple Injectors and Split Injection to Reduce DI Diesel Engine Emissions
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Abstract
This research uses computational modeling to explore methods to increase diesel engine power density while maintaining low pollutant emission levels. Previous experimental studies have shown that injection-rate profiles and injector configurations play important roles on the performance and emissions of particulate and NOx in DI diesel engines. However, there is a lack of systematic studies and fundamental understanding of the mechanisms of spray atomization, mixture formation and distribution, and subsequently, the combustion processes in spray/spray and spray/swirl interaction and flow configurations. In this study, the effects of split injections and multiple injector configurations on diesel engine emissions are investigated numerically using a multidimensional computer code. In order to be able to explore the effects of enhanced fuel-air mixing, the use of multiple injectors with different injector locations, spray orientations and impingement angles was studied. The interaction of the spray with the geometry of the combustion chamber was also systematically studied. The potential for the use of multiple injectors to increase engine power density and to significantly reduce particulate and NOx emissions in DI diesel engines is revealed. This work demonstrates that multidimensional modeling can now be used to gain insight into the combustion process and to provide direction for exploring new engine concepts.
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Uludogan, A., Xin, J., and Reitz, R., "Exploring the Use of Multiple Injectors and Split Injection to Reduce DI Diesel Engine Emissions," SAE Technical Paper 962058, 1996, https://doi.org/10.4271/962058.Also In
References
- Tow, T. C. Pierpont, D. A. Reitz, R. D. “Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty DI Diesel Engine,” SAE Paper 940897 1994
- Montgomery, D. T. Reitz, R. D. “Six-Mode Cycle Evaluation of the Effect of EGR and Multiple Injections on Particulate and NOx Emissions from a DI Diesel Engine,” SAE Paper 960316 1996
- Han, Z. Uludogan, A. Hampson, G. Reitz, R. D. “Mechanism of Soot and NOx Emission Reduction Using Multiple-injection in a Diesel Engine,” SAE Paper 960633 1996
- Reitz, R. D. Rutland, C. J. “Development and Testing of Diesel Engine CFD Models,” Prog. Energy Combust. Sci. 21 173 196 1995
- Sinko, K.M. Shih, S. Chehroudi, B. “Emission Characteristics of a Dual-injector Diesel Fuel Injection System” SAE Paper 960839 1996
- Amsden, A. A. O'Rourke, P. J. Butler, T. D. “KIVA-II -A Computer Program for Chemically Reactive Flows with Sprays,” Los Alamos National Laboratory 1989
- Kong, S. C. Reitz, R. D. “Multidimensional Modeling of Diesel Ignition and Combustion Using a Multistep kinetics Model,” Journal of Engineering for Gas Turbine and Power 115 781 789 1993
- Xin, J. Montgomery, D. T. Han, Z. Reitz, R. D. “Computer Modeling of the Six-Mode Emissions Test Cycle of a DI Diesel Engine,” Journal of Engineering for Gas Turbine and Power 1996
- Reitz, R. D. “Modeling Atomization Processes in High-Pressure Vaporizing Sprays,” Atomization and Spray Technology 3 309 1987
- Abraham, J. Bracco, F. V. Reitz, R. D. “Comparisons of Computed and Measured Premixed Charge Engine Combustion,” Combustion and Flame 60 309 322 1985
- Reitz, R. D. Bracco, F. V. “Global Kinetics Models and Lack of Thermodynamics,” Combustion and Flame 53 141 143 1983
- Halstead, M. P. Kirsch, L. J. Quinn, C. P. “The Autoignition of Hydrocarbon Fuels at High Temperatures and Pressures - Fitting of a Mathematical Model,” Combustion and Flame 30 45 60 1977
- Han, Z. Reitz, R. D. “Turbulence Modeling of Internal Combustion Engines Using RNG K-e Models,” Combustion Science and Technology 106 267 295 1995
- Han, Z. Reitz, R.D. “A Temperature Wall Function Formulation for Variable-Density Turbulence Flows with Application to Engine Convective Heat Transfer Modeling,” International Journal of Heat and Mass Transfer 1996
- Westenberg, A. A. “Kinetics of NO and CO in Lean, Premixed Hydrocarbon-Air Flames,” Combustion Science and Technology 4 59 64 1971
- Hiroyasu, H. Kadota, T. “Models for Combustion and Formation of Nitric Oxide and Soot in DI Diesel Engines,” SAE Paper 760129 1976
- Nagle, J. Strickland-Constable, R. F. “Oxidation of Carbon between 1000-2000 C,” Proceeding of the fifth Carbon Conference 1 154 1962
- Patterson, M. A. Kong, S.-C. Hampson, G. J. Reitz, R. D “Modeling the Effects of Fuel Injection Characteristics on Diesel Engine Soot and NOx Emissions,” SAE Paper 940523 1994
- Mather, D.K. Reitz, R.D. “Modeling the Use of Air-injection for Emissions Reduction in a Direct-injected Diesel Engine” SAE Paper 952359 1995