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Optimization of Multi Stage Direct Injection-PSCCI Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 9, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The more and more stringent regulations on emissions lead the automotive companies to develop innovative solutions for new powertrain concepts, including the employment of advanced combustion strategies and mixture of fuels with different thermochemical properties. HCCI combustion coupled with the partial direct injection of the charge is a promising technique, in order to control the performance and emissions and to extend the operating range.
In this work an in-house developed multi-dimensional CFD software package has been used to analyze the behavior of a multi stage direct injection - partially stratified charge compression ignition engine fueled with PRF97. A combustion model based on the partially stirred reactor concept to include the influence of turbulence on chemistry has been employed. Specifically, a skeletal kinetic reaction mechanism for PRF oxidation, with a dynamic adaptive chemistry technique to reduce the computational cost of the simulations has been used. Most of the fuel is injected during the intake stroke, in order to get a homogeneous mixture of fuel and air, whereas the remaining part is injected at the end of the compression stroke, in order to stratify fuel and temperature distributions in the chamber. The delay of fuel injection leads to a lower average temperature in the chamber, thus controlling the heat release rate and NOx emissions.
The numerical model has been validated by comparing the results with experimental data available in the literature. Several simulations were performed to optimize the operations of the engine by changing the timing and duration of DI into the chamber and the ratio between the amount of fuel injected during the delayed stage and the amount of early-injected fuel.
CitationViggiano, A. and Magi, V., "Optimization of Multi Stage Direct Injection-PSCCI Engines," SAE Technical Paper 2019-24-0029, 2019.
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- Viggiano, A. and Magi, V. , “A Comprehensive Investigation on the Emissions of Ethanol HCCI Engines,” Applied Energy 93:277-287, 2012, doi:10.1016/j.apenergy.2011.12.063.
- Bendu, H. and Murugan, S. , “Homogeneous Charge Compression Ignition (HCCI) Combustion: Mixture Preparation and Control Strategies in Diesel Engines,” Renewable and Sustainable Energy Reviews 38:732-746, 2014, doi:10.1016/j.rser.2014.07.019.
- Berntsson, A. W. and Denbratt, I. , “HCCI Combustion Using Charge Stratification for Combustion Control,” SAE Technical Paper 2007-01-0210, 2007, doi:10.4271/2007-01-0210.
- Zheng, Z. and Yao, M. , “Charge Stratification to Control HCCI: Experiments and CFD Modeling with n-Heptane as Fuel,” Fuel 88:354-365, 2009, doi:10.1016/j.fuel.2008.09.002.
- DelVescovo, D., Kokjohn, S., and Reitz, R. , “The Effects of Charge Preparation, Fuel Stratification, and Premixed Fuel Chemistry on Reactivity Controlled Compression Ignition (RCCI) Combustion,” SAE Int. J. Engines 10(4):1491-1505, 2017, doi:10.4271/2017-01-0773.
- Viggiano, A. and Magi, V. , “An Investigation on the Performance of Partially Stratified Charge CI Ethanol Engines,” in SAE 2011 World Congress and Exhibition, 2011, doi:10.4271/2011-01-0837.
- Benajes, J., García, A., Monsalve-Serrano, J., and Villalta, D. , “Benefits of E85 Versus Gasoline as Low Reactivity Fuel for an Automotive Diesel Engine Operating in Reactivity Controlled Compression Ignition Combustion Mode,” Energy Conversion and Management 159:85-95, 2018, doi:10.1016/j.enconman.2018.01.015.
- Li, C., Xu, L., Bai, X., Tunestal, P. et al. , “Effect of Piston Geometry on Stratification Formation in the Transition from HCCI to PPC,” SAE Technical Paper 2018-01-1800, 2018, doi:10.4271/2018-01-1800.
- Brands, T., Hottenbach, P., Koss, H., Grunefeld, G. et al. , “Effects of Mixture Stratification on Ignition and Combustion in a GCAI Engine,” SAE Int. J. Engines 7(2):714-729, 2014, doi:10.4271/2014-01-1270.
- Magi, V. , “REC-2000: A Multidimensional Code for Transient, Two-Phase, Turbulent Reacting Flows,” Engine Research Laboratory Report, School of Mechanical Engineering, Purdue University, 2000.
- Coskun, G., Soyhan, H. S., Demir, U., Turkcan, A. et al. , “Influences of Second Injection Variations on Combustion and Emissions of an HCCI-DI Engine: Experiments and CFD Modelling,” Fuel 136:287-294, 2014, doi:10.1016/j.fuel.2014.07.042.
- Abraham, J., Khan, A., and Magi, V. , “Jet-Jet and Jet-Wall Interactions of Transient Jets from Multi-Hole Injectors,” SAE Technical Paper 1999-01-0513, 1999, doi:10.4271/1999-01-0513.
- Magi, V., Iyer, V., and Abraham, J. , “The K − 𝜀 Model and Computed Spreading Rates in Round and Plane Jets,” Numerical Heat Transfer, Part A: Applications 40(4):317-334, 2001, doi:10.1080/104077801753238130.
- Iyer, V. A., Abraham, J., and Magi, V. , “Exploring Injected Droplet Size Effects on Steady Liquid Penetration in a Diesel Spray with a Two-Fluid Model,” International Journal of Heat and Mass Transfer 45(3):519-531, 2001, doi:10.1016/S0017-9310(01)00168-5.
- Owston, R., Magi, V., and Abraham, J. , “A Numerical Study of Thermal and Chemical Effects in Interactions of N-Heptane Flames with a Single Surface,” Combustion and Flame 148(3):127-147, 2007, doi:10.1016/j.combustflame.2006.10.006.
- Owston, R., Magi, V., and Abraham, J. , “Wall Interactions of Hydrogen Flames Compared with Hydrocarbon Flames,” SAE Technical Paper 2007-01-1466, 2007, doi:10.4271/2007-01-1466.
- Viggiano, A. and Magi, V. , “Dynamic Adaptive Chemistry Applied to Homogeneous and Partially Stratified Charge CI Ethanol Engines,” Applied Energy 113:848-863, 2014, doi:10.1016/j.apenergy.2013.08.002.
- Launder, B. E. and Spalding, D. B. , “The Numerical Computations of Turbulent Flows,” Computer Methods in Applied Mechanics and Engineering 3(2):269-289, 1974, doi:10.1016/0045-7825(74)90029-2.
- Grasso, F. and Magi, V. , “Numerical Methodologies for the Compressible Navier-Stokes Equations for Two-Phase Flows,” Modern Research Topics in Aerospace Propulsion, Springer-Verlag, New York, ISBN: 0-387-97417-2:227-250, 1991.
- Li, Z., Cuoci, A., Sadiki, A., and Parente, A. , “Comprehensive Numerical Study of the Adelaide Jet in Hot-Coflow Burner by Means of RANS and Detailed Chemistry,” Energy 139:555-570, 2017, doi:10.1016/j.energy.2017.07.132.
- Kong, S. C. and Reitz, R. D. , “Numerical Study of Premixed HCCI Engine Combustion and its Sensitivity to Computational Mesh and Model Uncertainties,” Combustion Theory and Modelling 7(2):417-433, 2003, doi:10.1088/1364-7830/7/2/312.
- Magnussen, B. and Hjertager, B. , “On Mathematical Modeling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion,” Symposium (International) on Combustion 16(1):719-729, 1977, doi:10.1016/S0082-0784(77)80366-4.
- Stone, H. L. , “Iterative Solution of Implicit Approximations of Multidimensional Partial Differential Equations,” SIAM Journal on Numerical Analysis 5(3):530-558, 1968, doi:10.1137/0705044.
- Hairer, E. and Wanner, G. , “Solving Ordinary Differential Equations II. Stiff and Differential-Algebraic Problems,” Springer Series in Computational Mathematics 14, Springer-Verlag 1996.
- Tsurushima, T. , “A New Skeletal PRF Kinetic Model for HCCI Combustion,” Proc. Combust. Inst 32(2):2835-2841, 2009, doi:10.1016/j.proci.2008.06.018.
- Saxena, P. and Williams, F. A. , “Numerical and Experimental Studies of Ethanol Flames,” Proc. Combust. Inst. 31(1):1149-1156, 2007, doi:10.1016/j.proci.2006.08.097.
- Ferrari, G. , Motori a combustion interna (Società Editrice Esculapio, 2016).
- Heywood, J. , Internal combustion engine fundamentals (New York: McGraw-Hill Inc, 1988).
- Kitamura, T., Ito, T., Senda, J., and Fujimoto, H. , “Mechanism of Smokeless Diesel Combustion with Oxygenated Fuels Based on the Dependence of the Equivalence Ration and Temperature on Soot Particle Formation,” International Journal of Engine Research 3(4):223-248, 2002, doi:10.1243/146808702762230923.