A Two-Zone Multigrid Model for SI Engine Combustion Simulation Using Detailed Chemistry

An efficient multigrid (MG) model was implemented for spark-ignited (SI) engine combustion modeling using detailed chemistry. The model is designed to be coupled with a level-set-G-equation model for flame propagation (GAMUT combustion model) for highly efficient engine simulation. The model was explored for a gasoline direct-injection SI engine with knocking combustion. The numerical results using the MG model were compared with the results of the original GAMUT combustion model. A simpler one-zone MG model was found to be unable to reproduce the results of the original GAMUT model. However, a two-zone MG model, which treats the burned and unburned regions separately, was found to provide much better accuracy and efficiency than the one-zone MG model. Without loss in accuracy, an order of magnitude speedup was achieved in terms of CPU and wall times. To reproduce the results of the original GAMUT combustion model, either a low searching level or a procedure to exclude high-temperature computational cells from the grouping should be applied to the unburned region, which was found to be more sensitive to the combustion model details.

[1]  R. Reitz,et al.  Improved combustion submodels for modelling gasoline engines with the level set G equation and detailed chemical kinetics , 2009 .

[2]  Rolf D. Reitz,et al.  Multidimensional Simulation of the Influence of Fuel Mixture Composition and Injection Timing in Gasoline-Diesel Dual-Fuel Applications , 2008 .

[3]  Andreas M. Lippert,et al.  Modeling ignition phenomena in spray-guided spark-ignited engines , 2009 .

[4]  C. Law,et al.  Toward accommodating realistic fuel chemistry in large-scale computations , 2009 .

[5]  Rolf D. Reitz,et al.  Validation of Advanced Combustion Models Applied to Two-Stage Combustion in a Heavy Duty Diesel Engine , 2009 .

[6]  S M Aceves,et al.  A fully coupled computational fluid dynamics and multi-zone model with detailed chemical kinetics for the simulation of premixed charge compression ignition engines , 2005 .

[7]  Rolf D. Reitz,et al.  An adaptive multi-grid chemistry (AMC) model for efficient simulation of HCCI and DI engine combustion , 2009 .

[8]  N. Peters,et al.  Pollutant formation modelling in natural gas SI engines using a level set based flamelet model , 2008 .

[9]  Long Liang,et al.  A dynamic adaptive chemistry scheme for reactive flow computations , 2009 .

[10]  Rolf D. Reitz,et al.  Acceleration of the chemistry solver for modeling DI engine combustion using dynamic adaptive chemistry (DAC) schemes , 2010 .

[11]  R. Reitz,et al.  Validation of engine combustion models against detailed in-cylinder optical diagnostics data for a heavy-duty compression-ignition engine , 2007 .

[12]  Rolf D. Reitz,et al.  Modeling Knock in Spark-Ignition Engines Using a G-equation Combustion Model Incorporating Detailed Chemical Kinetics , 2007 .

[13]  R. J. Kee,et al.  Chemkin-II : A Fortran Chemical Kinetics Package for the Analysis of Gas Phase Chemical Kinetics , 1991 .

[14]  Sauber Petronas.  Supercomputing in F1 - Unlocking the Power of CFD , 2005 .

[15]  A. A. Amsden,et al.  KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves , 1997 .

[16]  M. Metghalchi,et al.  Burning Velocities of Mixtures of Air with Methanol, Isooctane, and Indolene at High Pressure and Temperature , 1982 .

[17]  Rolf D. Reitz,et al.  Development of an Ignition and Combustion Model for Spark-Ignition Engines , 2000 .

[18]  Norbert Peters,et al.  On unsteady premixed turbulent burning velocity prediction in internal combustion engines , 2007 .

[19]  Yu Shi,et al.  Engine Development Using Multi-dimensional CFD and Computer Optimization , 2010 .

[20]  Yu Shi,et al.  Optimization of a HSDI Diesel Engine for Passenger Cars Using a Multi-Objective Genetic Algorithm and Multi-Dimensional Modeling , 2009 .

[21]  Long Liang,et al.  A Dynamic Multi-Zone Partitioning Scheme for Solving Detailed Chemical Kinetics in Reactive Flow Computations , 2009 .

[22]  Frediano V. Bracco,et al.  Comparisons of computed and measured premixed charge engine combustion , 1985 .

[23]  Rolf D. Reitz,et al.  An ignition and combustion model based on the level-set method for spark ignition engine multidimensional modeling , 2006 .

[24]  Song-Charng Kong,et al.  Modeling Premixed and Direct Injection SI Engine Combustion Using the G-Equation Model , 2003 .

[25]  Rolf D. Reitz,et al.  Optimization of a high-speed direct-injection diesel engine at low-load operation using computational fluid dynamics with detailed chemistry and a multi-objective genetic algorithm , 2010 .

[26]  N. Peters.  The turbulent burning velocity for large-scale and small-scale turbulence , 1999, Journal of Fluid Mechanics.

[27]  R. Reitz,et al.  Use of Detailed Chemical Kinetics to Study HCCI Engine Combustion With Consideration of Turbulent Mixing Effects , 2002 .

[28]  Rolf D. Reitz,et al.  Modeling the Effects of In-Cylinder Flows on HSDI Diesel Engine Performance and Emissions , 2008 .

[29]  R. Reitz,et al.  Development and Validation of a Reduced Reaction Mechanism for HCCI Engine Simulations , 2004 .

[30]  Rolf D. Reitz,et al.  Optimization study of the effects of bowl geometry, spray targeting, and swirl ratio for a heavy-duty diesel engine operated at low and high load , 2008 .

[31]  Rolf D. Reitz,et al.  Development of a Flame Propagation Model for Dual-Fuel Partially Premixed Compression Ignition Engines , 2006 .

[32]  R. Reitz,et al.  A reduced chemical kinetic model for IC engine combustion simulations with primary reference fuels , 2008 .

[33]  Song-Charng Kong,et al.  Development of a Semi-implicit Solver for Detailed Chemistry in Internal Combustion Engine Simulations , 2007 .