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LES Based Modeling and Simulation of Spray Dynamics including Gasoline Direct Injection (GDI) Processes using KIVA-4 Code
Technical Paper
2012-01-1257
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In the GDI engines, the accuracy of the numerical results and their contribution to the design analysis and optimization tasks strongly depend on the predictive capabilities of the physical processes. While most of the studies apply RANS concept, in this contribution LES methodology is suggested as suitable unsteady approach for simulating spray dynamics including GDI processes using KIVA-4 CFD-code. A comprehensive model is integrated in a Eulerian-Lagrangian framework allowing to describe the spray evolving from the injector nozzle and propagating within the combustion chamber. It includes sub-models to account for various relevant sub-processes. The atomization is described using combined primary and secondary atomization sub-models. Instead of performing costly level set method or VOF technique, a LISA-based sub-model is applied for the primary atomization. The secondary atomization is modeled by a TAB model. The novelty of the proposed methodology is to include droplet-droplet interaction processes via an appropriate collision sub-model that is independent of mesh size and type. Thereby, it takes into account different regimes, such as, bouncing, separation, stretching separation, reflective separation and droplet coalescence. A resulting droplet distribution is then tracked in Lagrangian way. The droplet evaporation is described by an appropriate evaporation model and the turbulent dispersion by the filtered velocity only. The spray module is coupled to LES of the carrier phase in which a Smagorinsky model is used for the filtered flow field. The SGS scalar flux in scalar transport equations (of mass fraction and temperature) is captured by a simple gradient assumption. Comparisons of the simulation results in terms of spray profile with experiments for different injection times demonstrate that the essential features of the spray dynamics are reproduced to a good accuracy.
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Authors
Citation
Nishad, K., Pischke, P., Goryntsev, D., Sadiki, A. et al., "LES Based Modeling and Simulation of Spray Dynamics including Gasoline Direct Injection (GDI) Processes using KIVA-4 Code," SAE Technical Paper 2012-01-1257, 2012, https://doi.org/10.4271/2012-01-1257.Also In
References
- Martin, D. Pischke, P. Kneer, R. “Investigation of the Influence of Multiple Gasoline Direct Injections on Macroscopic Spray Quantities at Different Boundary Conditions by Means of Visualization Techniques,” Int. J. Eng. Res. 11 6 439 454 2010
- Herrmann, M. Gorokhovski, M. “Modeling Primary Atomization” Ann. Rev. Fluid Mech. 40 1 343 366 2008
- Spyrou, N. Choi, D. Sadiki, A. Janicka, J. “Large Eddy Simulation of the Break-up of Kerosene Jet in Cross-Flow” Int. Conf. Multi. Flow, 2010 Tampa, FL May 30 June 4 2010
- Befrui, B. Corbinelli, G. Robart, D. Reckers, W. et al. “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
- Herrmann, M. “Detailed Numerical Simulations of the Primary Atomization of a Turbulent Liquid Jet in Cross-Flow,” J. Engg. Gas Tur. Power 132 6 061506 061515 2010
- Pischke, P. Martin, D. Kneer, R. Combined Spray Model for Gasoline Direct Injection Hollow-Cone Sprays Atomization and Sprays 20 4 335 364 2010
- Rutland, C. I. “LES for Internal Combustion Engines-A Review,” Int. J. Eng. Res. 12 6 421 451 2011
- Menter, F. R. Egorov, Y. “The Scale Adaptive Simulation Method for Unsteady Flow Prediction, Part 1: Theory and Model Description,” Flow Turb. Comb. 85 1 139 165 2010
- Temmerman, L. Hadziabdic, H. Leschziner, M. A. Hanjalic, A. “A Hybrid Two-Layer URANS-LES Approach for Large Eddy Simulation at High Reynolds Numbers,” Int. J. Heat Fluid Flow 26 2 173 190 2005
- Janicka, J. Sadiki, A. “Large Eddy Simulation of Turbulent Combustion System,” Proceedings of the Combustion Institute 30 1 537 547 2005
- Apte, S. V. Mahesh, K. Moin, P. “Large Eddy Simulation of Evaporating Spray in Coaxial Combuster,” Proceedings of the Combustion Institute 32 2 2247 2256 2009
- Goryntsev, D. Sadiki, A. Klein, M. Janicka, J. “Large Eddy Simulation Based Analysis of the Effects of Cycle-to-Cycle Variations on Air-Fuel Mixing in Realistic DISI IC-Engines,” Proceedings of the Combustion Institute 30 1 537 547 2009
- Nishad, K. P. Sadiki, A. “LES and RANS Comparison Study of Atomization Process in Hollow Cone Gasoline Injector Using KIVA-4 Code,” ILASS Europe, Estoril, Portugal 5 7 Sep. 2011
- Nishad, K. Sadiki, A. Janicka, J. “A Comprehensive Modeling and Simulation of Gasoline Direct Injection using KIVA-4 code,” SAE Technical Paper 2011-01-1899 2011 10.4271/2011-01-1899
- Torres, D. Trujillo, M. “KIVA-4: An Unstructured ALE Code for Compressible Gas Flow with Sprays,” J. Comp. Physics 219 2 943 975 2006
- 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, New Mexico)” 12 20 1989
- Senecal, P. Schmidt, D. Nouar, I. Rutland, C. Reitz, R. Corradini, M. “Modeling of High Speed Viscous Liquid Sheet Atomization,” Int. J. Multiphase Flow 25 6-7 1073 1097 1999
- O'Rourke, P. Amsden, A. “The Tab Method for Numerical Calculation of Spray Droplet Breakup,” SAE Technical Paper 872089 1987 10.4271/872089
- Dombrowski, N. Johns, W. R. “The Aerodynamic Instability and Disintegration of Viscous Liquid Sheets,” Chem. Engng Sci. 18 3 203 214 1963
- O'Rourke, P. “Collective Drop Effects in Vaporizing Liquid Sprays,” Ph.D. Thesis Department of Mechanical and Aerospace Engineering, Princeton University Princeton, NJ 1981
- Munnannur, A. Reitz, R. “A New Predictive Model for the Fragmenting and Non-Fragmenting Binary Droplet Collisions,” Int. J. Multiphase Flow 33 8 873 896 2007
- Schmidt, D. P. Rutland, C. J. “Reducing Grid Dependency in Droplet Collision Modeling,” J. Engg. Gas Tur. Power 126 2 227 233 2004
- Smagorinsky, J. “General Circulation Experiments with the Primitive Equations. I. The Basic Experiment,” Monthly Weather Review 91 3 99 164 1963
- Chrigui, M. Zghal, A. Sadiki, A. Janicka, J. “Spray Evaporation and Dispersion of N-heptane Droplets within Premixed Flame,” Int. J. Heat Mass Tran. 46 8-9 869 880 2010
- Faeth, G. M. “Current Status of Droplet and Liquid Combustion,” Prog. Energy Combust. Sci. 3 4 191 224 1977
- Martin, D. Stratmann, J. Pischke, P. Kneer, R. et al. “Experimental Investigation of the Interaction of MultipleGDI Injections using Laser Diagnostics,” SAE Int. J. Engines 3 1 372 388 2010 10.4271/2010-01-0596