Towards universal EDC-based combustion model for compression ignited engine simulations

The new EDC model formulation based on the operator-splitting procedure applied to the mass conservation equations for species participating in reversible chemical reactions which can be interpreted as representing combustion in a partially stirred reactor (PaSR) volume is presented. The model has been implemented in the KIVA-3V code, and examples of the model application to spray and gas combustion are illustrated, first, by the results of the 3-D modeling of the Diesel DI Volvo D12C engine. The combustion mechanism of diesel oil surrogate included of 68 species (including soot aromatic precursors) participating in 280 reversible reactions. Mean features of diesel spray engine combustion under conditions of delayed injection when auto-ignition has much in common with HCCI process are predicted in accordance with experimental data. As another application, the results of the 2-D simulations on a relatively coarse (∼1000 cells) grid for a combustion chamber of a natural gas fueled MHI HCCI model engine are presented and discussed. The reaction mechanism consisting of 45 species participating in 230 reactions has been used in the analysis. The calculated averaged pressure and temperature vs Ca histories were predicted in reasonable agreement with MHI experimental data.

[1]  Charles Meneveau,et al.  The fractal facets of turbulence , 1986, Journal of Fluid Mechanics.

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

[3]  Anders Karlsson.  Modeling Auto-Ignition, Flame Propagation and Combustion in Non-Stationary Turbulent Sprays , 1995 .

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

[5]  Denis Veynante,et al.  Turbulent combustion modeling , 2002, VKI Lecture Series.

[6]  J. Chomiak,et al.  3-D Diesel Spray Simulations Using a New Detailed Chemistry Turbulent Combustion Model , 2000 .

[7]  G. B. Skinner,et al.  Shock tube investigation of ignition inethane-oxygen-argon mixtures , 1971 .

[8]  A. A. Amsden,et al.  KIVA3. A KIVA Program With Block-Structured Mesh for Complex Geometries , 1993 .

[9]  Dennis L. Siebers,et al.  A Study of the Autoignition Process of a Diesel Spray via High Speed Visualization , 1992 .

[10]  Jacques Villermaux,et al.  Representation du melange imparfait de deux courants de reactifs dans un reacteur agite continu , 1975 .

[11]  C. Westbrook,et al.  A Comprehensive Modeling Study of n-Heptane Oxidation , 1998 .

[12]  R. Reitz,et al.  Modeling and Experiments of HCCI Engine Combustion Using Detailed Chemical Kinetics with Multidimensional CFD , 2001 .

[13]  S. H. Jo,et al.  Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines , 1979 .

[14]  G. B. Skinner,et al.  Shock-tube investigation of ignition in methane--oxygen--argon mixtures. [Temperature from 1500 to 2150/sup 0/K and pressures of 2 to 10 atm] , 1971 .

[15]  B. Hjertager,et al.  On mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion , 1977 .

[16]  J. Chomiak,et al.  Evaluation of Ignition Improvers for Methane Autoignition , 1998 .