This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Initial Conditions in Multidimensional Combustion Simulations of HSDI Diesel Engines
Technical Paper
1999-01-1180
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The effects of numerical methodology in defining the initial conditions and simulating the compression stroke in D.I. diesel engine CFD computations are studied. Lumped and pointwise approaches were adopted in assigning the initial conditions at IVC. The lumped approach was coupled with a two-dimensional calculation of the compression stroke. The pointwise methodology was based on the results of an unsteady calculation of the intake stroke performed by using the STAR-CD code in the realistic engine and port geometry. Full engine and 60 deg. sector meshes were used in the compression stroke calculations in order to check the accuracy of the commonly applied axi-symmetric fluid dynamics assumption. Analysis of the evolution of the main fluid dynamics parameters revealed that local conditions at the time of injection strongly depend on the numerical procedure adopted. Combustion computations, made with a modified version of the KIVA code, showed that differences in local temperature or equivalence ratio distribution play a key role in emission predictions even if their influence on the main combustion parameters is low.
Recommended Content
Authors
Topic
Citation
Bianchi, G., Richards, K., and Reitz, R., "Effects of Initial Conditions in Multidimensional Combustion Simulations of HSDI Diesel Engines," SAE Technical Paper 1999-01-1180, 1999, https://doi.org/10.4271/1999-01-1180.Also In
References
- Duclos, J.M. Bruneaux, G. Baritaud, T.A. “3D Modelling of Combustion and Pollutants in a 4-Valve SI Engine; Effect of Fuel and Residual Distribution and Spark Location” SAE Paper 961964 1996
- Fuchs, T.R. Rutland, C.J. “Intake Flow Effects on Combustion and Emissions in a Diesel Engine” SAE Paper 980508
- Boretti, A.A. et al “Advanced Tools for Intake and Exhaust Port Design in Four Valve Spark Ignition Engine” ATA Congress on “High Performnace Spark Ignition Engines for Passengers Cars” Milan, Italy November 1992
- Boretti, A.A. Cantore, G. Mattarelli, E. “Numerical Correlation of Combustion Evolution and Port and Combustion Chamber Shape in high Speed, Four Valve Spark Ignition Engine” SAE Paper 942534 1994
- Pinchon P. Le Coz J. Henriot S. “An Experimental and Computational Analysis of the Flow Field in a Four-Valve Spark Ignition Engine - Focus on Cycle-Resolved Turbulence” SAE Paper 900056 1990
- El Tahry S. H. “A Numerical Study on the Effects of Fluid Motion at Inlet-Valve Closure on Subsequent Fluid Motion in a Motored Engine” SAE Paper 820035 1982
- Cantore, G. Bianchi, G.M. Guerrini, G. Papetti, F “Multidimensional modeling of in-cylinder flows and combustion of a four valve S.I. competition engine” Proceedings of the 3rd International Conference ICE September 1997 Capri (Italy)
- Cantore G. Borghi M. Mattarelli E. Boretti A. A. Bianchi G. M. Chinni L. “Numerical simulation of turbulent combustion in a four valve spark ignition engine with CRI/TurboKIVA 2.0 code” Proceedings of Spring Technical Conference - Internal Combustion Engine Division of ASME Marietta (Ohio, U.S.) April 1995
- Bo, T. Clerides, D. Gosman, A. D. Theodossopoulos, P. “Prediction of the Flow and Spray Processes in an Automobile DI Diesel Engine” SAE Paper 970882
- Schindler, K-P “Multidimensional modelling of Diesel Engines” SAE Paper 920591 1992
- Tanner, F.X. Weisser, G. “Simulation of Liquid Jet Atomization of Fuel Sprays by Means of a Cascade Drop Breakup Model” SAE Paper 980808 1998
- Weisser, G. Tanner, F.X. Boulouchos, K “Towards CRDF-Simulation of Large Diesel Engines: Modeling Approach for Key Processes” Proceed. 3-rd Int. ICE Conference Capri, Italy Sep. 17-20 1997
- Amsden, A.A. O'Rourke, P.J. Butler, T.D. “KIVA-II A Computer Program for Chemically Reactive Flows with Sprays,” Los Alamos National Labs 1989
- Yakhot, V. Orsag, S. A. “Renormalized Group Analysis of Turbulence. I. Basic. Theory” Journal of Scientific Computing 1 1986
- Han, Z. Reitz, R. D. “Turbulence Modeling of Internal Combustion Engines Using RNG k-ε Models” Combustion Science and Technology 106 267 295 1995
- Kong, S.-C Han, Z. Reitz, R. D. “The Development and Application of a Diesel Engine and Combustion Model for Multidimensional Engine Simulation” SAE 950278 1995
- Abraham, J. Bracco, F.V. Reitz, R. D. “Comparison of Computed and Measured Premixed Charged Engine Combustion,” Combustion and Flame 60 1985
- Su, T.F. Patterson, M.A. Reitz, R.D. Farrell, P.V. “Experimental and Numerical Studies of High Pressure Multiple Injection Sprays” SAE Paper 960861 1996
- Patterson, M. A. Reitz R. D. “Modeling the Effects of Fuel Spray Characteristics on Diesel Engine Combustion and Emissions” SAE Paper 980131 1998
- Tennison, P. Georjon, T. L. Farrell, P. V. Reitz, R. D. “An Experimental and Numerical Study of Sprays from Common Rail Injection System for Use in HSDI Diesel Engines” SAE 980810 1998
- Ricart, L. Reitz, R.D. Dec, J. “Comparison of Predicted Diesel Spray Liquid Penetration and Vapor Fuel Distribution with In-Cylinder Optical Measurements” ASME Fall Technical- Conference, Paper No. 97-ICE52 29 2 1997
- Reitz, R. D. Diwakar, R. “Structure of High-Pressure Fuel Sprays” SAE Paper 870598 1987
- Reitz, R. D. Bracco, F.V Mechanism of Atomitazion of Liquid Jet” Phys. Fluids 25 2 1730 1741 1982
- Han, Z. Uludogan, Ali Hampson, G.J Reitz, R.D. “Mechanism of Soot and NOx Emissions Reduction Using Multiple Injection in a Diesel Engine” SAE Paper 960633 1996
- Liu, A.B. Mather, D. Reitz R.D. Modeling the effects of drop drags and breakup on fuel sprays” SAE Paper 930072
- Patterson, M.A. Kong, S.C. Hampson, G.J. Reitz R.D. “Modeling the Effects of Fuel Injection Characteristics on Diesel Soot and NOx Formation SAE Paper 940523 1994
- Levich, V. G. “Physicochemical Hydrodynamics” Prentice Hall Inc New Jersey 1962
- Han, Z Reitz, R.D. Corcione, F.E. Valentino, G. “Interpretation of K-ε Computed Turbulence Length Scale Prediction For Engine Flows” 26 th Symposium (International) on Combustion, The Combustion Institute 2717 2723 1996
- Gonzales, M. D. Lian, Z. W. Reitz, R. D. “Modeling Diesel Engine Spray Vaporization and Combustion,” SAE Paper 920579 1992
- Dec, J. E. “A conceptual Model of DI Diesel Combustion Besed on Laser Sheet Imaging” SAE Technical Paper 970873 1997
- Das, S. Dent, J. C. “Simulation of the Mean Flow in the Cylinder of a Motored 4-Valved Spark Ignition Engine” SAE 952384 1995