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A Numerical Investigation on Scalability and Grid Convergence of Internal Combustion Engine Simulations
Technical Paper
2013-01-1095
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Traditional Lagrangian spray modeling approaches for internal combustion engines are highly grid-dependent due to insufficient resolution in the near nozzle region. This is primarily because of inherent restrictions of volume fraction with the Lagrangian assumption together with high computational costs associated with small grid sizes. A state-of-the-art grid-convergent spray modeling approach was recently developed and implemented by Senecal et al., (ASME-ICEF2012-92043) in the CONVERGE software. The key features of the methodology include Adaptive Mesh Refinement (AMR), advanced liquid-gas momentum coupling, and improved distribution of the liquid phase, which enables use of cell sizes smaller than the nozzle diameter. This modeling approach was rigorously validated against non-evaporating, evaporating, and reacting data from the literature. The current numerical study focuses on further demonstration of the grid-convergent modeling approach for simulating a single-cylinder Cat® compression ignition engine. The simulated injector is characterized with a nominal nozzle exit diameter of 259 μm. Simulations using various minimum grid sizes (ranging from 125 μm to 1000 μm) are compared for engine performance and emissions parameters of interest such as pressure, heat release rate, ignition delay, NOx, HC, and soot emissions. The peak cell-count for the highest resolution simulation was on the order of 34 million. These computationally expensive simulations were facilitated at a high-performance computing facility at Argonne National Laboratory. Scaling studies were also performed. The validity of previously recommended grid settings (ASMEICEF2012-92043) for accuracy/runtime trade-off is further assessed. Efficacy of a simplified combustion model is also compared against a detailed chemical-kinetics-based combustion model.
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Authors
- Sibendu Som - Argonne National Laboratory
- Douglas Longman - Argonne National Laboratory
- Shashi Aithal - Argonne National Laboratory
- Raymond Bair - Argonne National Laboratory
- Marta García - Argonne National Laboratory
- Shaoping Quan - Convergent Science Inc.
- K. J. Richards - Convergent Science Inc.
- P. K. Senecal - Convergent Science Inc.
- Tushar Shethaji - Caterpillar Inc.
- Marcus Weber - Caterpillar Inc.
Topic
Citation
Som, S., Longman, D., Aithal, S., Bair, R. et al., "A Numerical Investigation on Scalability and Grid Convergence of Internal Combustion Engine Simulations," SAE Technical Paper 2013-01-1095, 2013, https://doi.org/10.4271/2013-01-1095.Also In
References
- Som S. , Aggarwal S.K. An Assessment of Atomization Models for Diesel Engine Simulations Atomization and Sprays 2009 19 9 885 903
- Abani N. , Munnannur A. , Reitz R.D. Reduction of Numerical Parameter Dependencies in Diesel Spray Models ASME Journal of Engineering for Gas Turbine and Power 2008 130 1 9
- Abraham , J. What is Adequate Resolution in the Numerical Computations of Transient Jets? SAE Technical Paper 970051 1997 10.4271/970051
- Iyer V. , Abraham J. Penetration and Dispersion of Transient Gas Jets and Sprays Combustion Science and Technology 1997 130 315 334
- Senecal P.K. , Pomraning E. , Richards K. , Som S. Grid convergent spray models for internal combustion engine CFD simulations Proceedings of the ASME 2012 Internal combustion engine division fall technical conference 2012
- Magnussen B.F. , Hjertager B.H. On Mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion Proceedings of the Combustion Institute 1976 16 719 729
- Abraham J. , Bracco F.V. , Reitz R.D. Comparisons of computed and measured premixed charge engine combustion Combustion and Flame 1985 60 309 322
- Xin J. , Montgomery D.T. , Han Z. , Reitz R.D. Computer Modeling of the six-mode emission test cycle of a DI Diesel Engine Journal of Engineering for Gas Turbine and Power 1997 119 683 698
- Oefelein , J. , Dahms , R. , and Lacaze , G. Detailed Modeling and Simulation of High-Pressure Fuel Injection Processes in Diesel Engines SAE Int. J. Engines 5 3 1410 1419 2012 10.4271/2012-01-1258
- Dahms R. , Oefelein J. , Pickett L.M. A dense fluid approximation for the simulation of diesel engine fuel injection processes 23 rd Annual conference on Liquid Atomization and Spray Systems , ILASS2011-161 2011
- Gorokhovski M. , Herrmann M. Modeling Primary Atomization Annual Review in Fluid Mechanics 2008 40 343 366
- Granet V. Is Large eddy simulation a suitable tool to study cycle-to-cycle variations in spark ignition engines? Ph.D. thesis INP Toulouse / Cerfacs 2011
- Granet V. , Vermorel O. , Lacour C. , Enaux B. , Dugue V. , Poinsot T. Large eddy simulation and experimental study of cycleto-cycle variations of stable and unstable operating points in a spark ignition engine Combustion and Flame 2012 159 4 1562 1575
- Karypis G. METIS - A Software Package for Partitioning Unstructured Graphs, Partitioning Meshes, and Computing Fill-Reducing Orderings of Sparse Matrices Version 5.0 2011
- Richards K.J. , Senecal P.K. , Pomraning , E. CONVERGE (Version 1.4.1) Manual Convergent Science, Inc. Middleton, WI 2012
- Senecal , P. , Richards , K. , Pomraning , E. , Yang , T. et al. A New Parallel Cut-Cell Cartesian CFD Code for Rapid Grid Generation Applied to In-Cylinder Diesel Engine Simulations SAE Technical Paper 2007-01-0159 2007 10.4271/2007-01-0159
- Som S. Development and validation of spray models for investigating diesel engine combustion and emissions Ph.D. thesis 2009 University of Illinois Chicago
- Yakhot V. , Orszag S.A. Renormalization Group Analysis of Turbulence. I. Basic Theory Journal of Scientific Computing 1996 1 1 3 51
- Reitz , R. and Diwakar , R. Structure of High-Pressure Fuel Sprays SAE Technical Paper 870598 1987 10.4271/870598
- Schmidt D.P. , Rutland C.J. A New Droplet Collision Algorithm Journal of Computational Physics 2000 164 62 80
- Post S. L. , Abraham J. Modeling the outcome of Drop-Drop Collisions in Diesel Sprays International Journal of Multiphase Flow 2002 28 997 1019
- Liu , A. , Mather , D. , and Reitz , R. Modeling the Effects of Drop Drag and Breakup on Fuel Sprays SAE Technical Paper 930072 1993 10.4271/930072
- 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 Report No. LA-11560-MS 1989
- Rhie C.M. Chow W.L. Numerical Study of the Turbulent Flow Past an Airfoil with Trailing Edge Separation AIAA Journal 1983 21 1525 1532
- Issa R.I. Solution of the Implicitly Discretised Fluid Flow Equations by Operator-Splitting Journal of Computational Physics 1985 62 40 65
- Senecal , P. , Pomraning , E. , Richards , K. , Briggs , T. et al. Multi-Dimensional Modeling of Direct-Injection Diesel Spray Liquid Length and Flame Lift-off Length using CFD and Parallel Detailed Chemistry SAE Technical Paper 2003-01-1043 2003 10.4271/2003-01-1043
- Kong S.C. , Sun Y. , Reitz R.D. Modeling Diesel Spray Flame Lift-off, Sooting Tendency, and NOx Emissions Using Detailed Chemistry with Phenomenological Soot Model ASME Journal of Gas Turbine and Power 2005 129 245 251
- Som S. , Aggarwal S.K. Effects of primary breakup modeling on spray and combustion characteristics of compression ignition engines Combustion and Flame 2010 157 1179 1193
- http://www.tfd.chalmers.se/∼valeri/MECH.html
- Som S. , Ramirez A.I. , Longman D.E. , Aggarwal S.K. Effect of nozzle orifice geometry on spray, combustion, and emission characteristics under diesel engines conditions Fuel 2011 90 1267 1276
- http://www.sandia.gov/ecn/
- Raju , M. , Wang , M. , Dai , M. , Piggott , W. et al. Acceleration of Detailed Chemical Kinetics Using Multi-zone Modeling for CFD in Internal Combustion Engine Simulations SAE Technical Paper 2012-01-0135 2012 10.4271/2012-01-0135
- Raju M. , Wang M. , Senecal P.K. , Som S. , Longman D.E. A reduced diesel surrogate mechanism for compression ignition engine applications Proceedings of the ASME 2012 Internal combustion engine division fall technical conference 2012 Canada
- Halstead M. , Kirsh L. , Quinn C. The Autoignition of hydrocarbon fuels at high temperatures and pressures - Fitting of a mathematical model Combustion and Flame 1997 30 45 60
- Heywood J.B. Internal Combustion Engine Fundamentals McGraw-Hill Inc. 1998
- Ramirez A.I. , Som S. , Rutter T.P. , Longman D.E. , Aggarwal S.K. Investigation of the Effects of Rate of Injection on Combustion Phasing and Emission Characteristics: Experimental and Numerical Study Spring Technical Meeting of the Central States Section of the Combustion Institute Dayton April 2012
- Karypis G. , Kumar V. A fast and high quality multilevel scheme for partitioning irregular graphs SIAM Journal on Scientific computing 1999 20 1 359 392
- Abraham , J. What is Adequate Resolution in the Numerical Computations of Transient Jets? SAE Technical Paper 970051 1997 10.4271/970051