This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
On Non-Equilibrium Turbulence Corrections in Multidimensional HSDI Diesel Engine Computations
Technical Paper
2001-01-0997
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
The introduction of high-pressure injection systems in D.I. diesel engines has highlighted already known drawbacks of in-cylinder turbulence modeling. In particular, the well known equilibrium hypothesis is far from being valid even during the compression stroke and moreover during the spray injection and combustion processes when turbulence energy transfer between scales occurs under non-equilibrium conditions. The present paper focuses on modeling in-cylinder engine turbulent flows. Turbulence is accounted for by using the RNG k-ε model which is based on equilibrium turbulence assumptions.
By using a modified version of the Kiva-3 code, different mathematically based corrections to the computed macro length scale are proposed in order to account for non-equilibrium effects. These new approaches are applied to a simulation of a recent generation HSDI Diesel engine at both full load and partial load conditions representative of the emission EUDC cycle.
The numerical results show that the proposed corrections improve the physical behavior of the combustion model by a self-scaling of the eddy-turnover time depending on the engine operating conditions. The overall achievement is the extension of modeling reliability over a wider range of operating conditions and in particular over those that are of interest in the European emission test cycle.
Authors
Topic
Citation
Bianchi, G., Pelloni, P., Zhu, G., and Reitz, R., "On Non-Equilibrium Turbulence Corrections in Multidimensional HSDI Diesel Engine Computations," SAE Technical Paper 2001-01-0997, 2001, https://doi.org/10.4271/2001-01-0997.Also In
References
- Hessel, R. Zhu, G. S. Yi, Y. Reitz, R.D. “The Influence of Physical Input Parameter Uncertainties on Multi-Dimensional Model Predictions of Diesel Engine Performance and Emissions” SAE Paper 2000-01-1178 2000
- Patterson, M. A. Kong, S.C. Hampson G.J. Reitz R.D. “Modeling the effects of fuel injection characteristics on Diesel engine soot and NOx emissions” SAE Paper N. 940523 1994
- Nagle, J. Strickland-Constable, R.F. “Oxidation of carbon between 1000-2000 C” Proc. of the Fifth Carbon Conf. 1 Pergammon Press 154 1962
- Han, Z. Reitz, R. D. Corcione, F. E. Valentino, G. “Interpretation of k-ε computed turbulence length-scale prediction for engine flows” Proceedings of 26th Symposium On Combustion The combustion Institute 2717 2723 1996
- Tanner, F.X. Reitz, R.D. “Scaling Aspects of the Characteristic Time Combustion mOdel in the Simulation of Diesel Engines” SAE Paper 1999-01-1175 1999
- Bianchi, G.M. Michelassi V. Reitz R.D. “Modeling the isotropic turbulence dissipation in engine flows by using the linear k-ε model” Proceedings of the Fall ASME ICE International Conference Ann Arbor (U.S) October 1999
- Tanner, F.X. Zhu, G.S. Reitz, R.D. “Non-equilibrium Turbulence considerations for Combustion Process in the Simulation of DI Diesel Engines” SAE Paper 2000-01-0586 2000
- Corcione, F.E Mattarelli, E. Bianchi, G.M. Pelloni, P. Luppino, F “Numerical Study of the Combustion Chamber Shape for Common Rail HSDI Diesel Engines” SAE Paper 2000-01-1179 2000
- Mansour, N.N. “Dispersion of Stratified Charges in the Engine Cylinder during the Compression Stroke” Flows in Internal Combustion Engines” Uzkan T. 35 43 ASME New York 1982
- Morel, T Mansour, N. N “Modeling of Turbulence In Internal Combustion Engines” SAE Paper 820040 1982
- El Thary, S. H. Haworth, D. C “Directions in Turbulence Modeling for in-Cylinder Flows in Reciprocating Engines” Journal of Propulsion and Power 8 5 1040 1048 1992
- Moriyoshi, Y. Kobayashi, H. Kamomoto, T. “Experimental Evaluation of the Turbulence Model in Numerical Simulation of In-Cylinder Air Motion” JSAE Review 10 2 April 1989
- Chan, M. Das, S. Reitz, R.D. “Modeling Multiple Injection and EGR Effects od Diesel Engine Emissions” SAE Paper 972864 1997
- Zanforlin, S Reitz, R.D. Gentili, R “Studying the Roles of Kinetics and Turbulence in the Simulation of Diesel Combustion by Means of an Extended Characteristic-Time-Model” SAE Paper 1999-01-1177 1999
- 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
- Amsden, A.A. O'Rourke, P.J. Butler, T.D. “Kiva-3: A KIVA Program with Bock-Structured Mesh for Complex Geometries,” Los Alamos National Labs 1993
- Gonzales, D. Borman, M. A. Reitz R. D. “Modeling Diesel Engine Spray Vaporization and Combustion” SAE Paper 920579 1992
- Abraham, J. “What is the Adequate Resolution in the Numerical Computation of Transient Jets?” SAE Paper, 970051 1997
- Beard, F. Duclos, J.M. Habchi, C. Bruneaux, G. Mokkadem, K. Baritaud, T. “Extension of The Langragian-Eulerian Liquid Spray Modeling - Application to High Pressure Evaporating Diesel Sprays” SAE Paper 2000-01-1893 2000
- Bianchi, G.M. Pelloni, P. “Modeling the Diesel Spray Breakup by Using a Hybrid Model” SAE Paper 1999-01-0226 , SAE International Congress Detroit 1999
- Bianchi, G.M. Pelloni, P. “A Cavitation-Induced Atomization Model for High.-Pressure Diesel Spray Simulations” Technical Paper 99SI044, 32 nd International ISATA Conference Wien June 1999
- Corcione, F.E Allocca, L. Pelloni, P. Bianchi, G.M. Luppino, F Ivaldi, D. “Modeling atomization and drop breakup of high-pressure Diesel Sprays” Proceedings of the Spring ASME ICE International Conference St. Antonio (U.S) April 2000
- Reitz, R. D. Diwakar, R. “Structure of High-Pressure Fuel Sprays” SAE Paper 870598 1987
- Huh, K.Y. Gosman, A.D. “A Phenomenological Model of Diesel Spray Atomization” Proceedings of The International Conference on Multiphase Flows September 24-27 Tsukuba, Japan 1991
- Arcoumanis, C Gavaises, M. French, B. “Effect of Fuel Injection on the Structure of Diesel Sprays,” SAE Paper 970799 1997
- Fath, A. Munch, K.U. Leipertz, A. “Spray Break-Up Process of Diesel Fuel Investigated Close to the Nozzle” Proceedings of ICLASS-'97 August 18-22 Seoul, Korea 1997
- 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
- Bianchi, G.M. Cantore, G. Michelassi, V. Parmeggiani, P. “On application of non-linear k-e models for Internal Combustion Engine flows” Proceedings of the Fall ASME ICE International Conference Ann Arbor (U.S) October 1999
- Leschziner, M. A. “Turbulence Modelling for Complex Flows - Necessary and Avoidable Compromises” Proceedings 7 th Symposium on CFD Bejiing 1997
- Suga, K. “Development and application of a cubic eddy-viscosity model of turbulence” Int. J. Heat and Fluid Flow 17 2 1996
- Durbin, P.A. Speziale, C. G. “Local anisotropy in strained turbulence at high Reynolds numbers” Journal of Fluids Engineering 113 3 December 1991
- Borgnakke, C Xiao, Y. “Compressible Turbulence Predicted by Reynolds Stress Models” SAE Paper 910260 1991
- El Tahry, S.H. “k-ε Equation for Compressible Reciprocating Flows” J. Energy 7 4 July-August 1983
- Coleman, G. N. Mansour, N. N “Modeling the rapid spherical compression of isotropic turbulence” Phys. Fluids 3 9 September 1991
- Wu, G. T. Ferziger, J.H. Chapman D.R. Stanford University, Department of Mechanical Engineering 1991