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Large Eddy Simulation of Stratified Combustion in Spray-guided Direct Injection Spark-ignition Engine
Technical Paper
2018-01-1420
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Stratified combustion in gasoline engines constitutes a promising means of achieving higher thermal efficiency for low to medium engine loads than that achieved with combustion under standard homogeneous conditions. However, creating a charge that leads to a stable efficient low-emission stratified combustion process remains challenging. Combustion through a stratified charge depends strongly on the dynamics of the turbulent fuel-air mixing process and the flame propagation. Predictive simulation tools are required to elucidate this complex mixing and combustion process under stratified conditions. For the simulation of mixing processes, combustion models based on large-eddy turbulence modeling have typically outperformed the standard Reynolds averaged Navier-Stokes methods. Therefore, we investigated spray-guided stratified combustion in a single cylinder engine using large-eddy turbulence modeling with a variant of the flame speed closure (FSC) model for premixed turbulent combustion. This model reveals the influence of the mixture composition on the flame speed. The effect of fluctuations in the composition were accounted for by using a presumed probability density function (PDF) approach for the mixture fraction. The fuel injection process was modeled with a standard Lagrangian spray model. More importantly, the measured in-cylinder pressure traces for three different loading cases with varying injection and ignition timings (leading to different levels of stratification) were accurately reproduced by the simulation. High-speed video images were used to evaluate the ability of the model to accurately simulate flame propagation under stratified conditions. The influence of mixture fluctuations on flame propagation was also investigated.
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Wadekar, S., Oevermann, M., and Lipatnikov, A., "Large Eddy Simulation of Stratified Combustion in Spray-guided Direct Injection Spark-ignition Engine," SAE Technical Paper 2018-01-1420, 2018, https://doi.org/10.4271/2018-01-1420.Data Sets - Support Documents
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References
- Lipatnikov , A.N. and Chomiak , J. Turbulent Flame Speed and Thickness: Phenomenology, Evaluation, and Application in Multi-dimensional Simulations Prog. Energy Combust. Sci. 28 1 74
- Drake , M.C. and Haworth , D.D. Advanced Gasoline Engine Development Using Optical Diagnostics and Numerical Modeling Proc. Combust. Inst. 31 99 124
- Dahlander , P. and Hemdal , S. High-Speed Photography of Stratified Combustion in an Optical GDI Engine for Different Triple Injection Strategies SAE Technical Paper 2015-01-0745 2015 10.4271/2015-01-0745
- Zhao , F. , Lai , M.C. , and Harringt , D.L. Flow Turbulence Combust 10.1016/ S0360-1285(99)00004-0
- Lipatnikov , A. and Chomiak , J. A Simple Model of Unsteady Turbulent Flame Propagation SAE Technical Paper 972993 1997 10.4271/972993
- Battistoni , M. , Xue , Q. , and Som , S. 10.2516/ogst/201524
- Fan , L. and Reitz , R.D. 10.1615/AtomizSpr.v10.i3-5.30
- Befrui , B. , Corbinelli , G. , Robart , D. , and Reckers , W. LES Simulation of the Internal Flow and Near-Field Spray Structure of an Outward-Opening GDi Injector and Comparison with Imaging Data SAE Technical Paper 2008-01-0137 2008 10.4271/2008-01-0137
- A. N. Lipatnikov Stratified Turbulent Flames: Recent Advances in Understanding the Influence of Mixture Inhomogeneities on Premixed Combustion and Modeling Challenges Progress in Energy and Combustion Science , Volume 62 2017 Pages 87 132 10.1016/j.pecs.2017.05.001
- Smagorinsky , J. General Circulation Experiments with the Primitive Equations: i. the Basic Experiment Mon. Wea. Rev. 91 3 99 164 1963
- Huang , C. , Yasari , E. , and Lipatnikov , A. A Numerical Study on Stratified Turbulent Combustion in a Direct-Injection Spark-Ignition Gasoline Engine Using an Open-Source Code SAE Technical Paper 2014-01-1126 2014 10.4271/2014-01-1126
- Zimont , V.L. Theory of Turbulent Combustion of a Homogeneous Fuel Mixture at High Reynolds Number Combust. Explos. Shock Waves 15 305 311 1979
- Ogink , R. and Golovitchev , V. Gasoline HCCI Modeling: An Engine Cycle Simulation Code with a Multi-zone Combustion Model SAE Technical Paper 2002-01-1745 2002
- Lucchini , T. , Della Torre , A. , D'Errico , G. , and Montenegro , G. Automatic Mesh Generation for CFD Simulations of Direct-Injection Engines SAE Technical Paper 2015-01-0376 2015 10.4271/2015-01-0376
- Janas , P. , Wlokas , I. , Böhm , B. , and Kempf , A. Flow Turbulence Combust 10.1007/s10494-016-9744-3
- Jasak , H. and Tukovic , Z. Automatic Mesh Motion for the Unstructured Finite Volume Method Transactions of FAMENA 30 2 1 20 2006
- Stefan Pischinger and John B. Heywood 10.1016/S0082-0784(06)80361-9
- Reitz , R.D. Modeling Atomization Processes in High Pressure Vaporizing Sprays Atomization Spray Technol. 3 309 337 1987
- Lipatnikov , A.N. and Huang , C. Modelling of the Influence of Mixture Fraction Fluctuations on Burning Rate in Partially Premixed Turbulent Flames Combust. Sci. Technol. 187 594 626 2015
- Baumann , M. , di Mare , F. , Janicka , J. On the Validation of Large Eddy Simulation Applied to Internal Combustion Engine Flows Part ii: Numerical Analysis Flow Turbul. Combust . 92 1-2 299 317 2014
- Zhao , Z.W. , Conley , J.P. , Kazakov , A. , and Dryer , F.L. Burning Velocities of Real Gasoline Fuel at 353 K and 500 K SAE Technical Paper 2003-01-3265
- Rutland , C.J. International Journal of Engine Research 10.1177/1468087411407248
- Pitsch , H. Large-Eddy Simulation of Turbulent Combustion Annu. Rev. Fluid Mech. 38 453 482 2006 10.1146/annurev.fluid.38.050304.092133