This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Using Large Eddy Simulations to Study Mixing Effects in Early Injection Diesel Engine Combustion
Technical Paper
2006-01-0871
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Early direct injection with HCCI like properties is characterized by the presence of an ignition dwell - the interval between end of fuel injection and start of combustion, during which fuel-air mixing occurs. Previous work by Jhavar and Rutland (2005) has focused on investigating different methods to affect fuel-air mixing during the ignition dwell. That study helped to evaluate the relative influence of various mixing control strategies to achieve ignition control. In this study, we attempt to look into the mixture preparation process in more detail. Therefore, turbulence is studied using Large Eddy Simulation (LES) models in place of Reynolds Averaged Navier Stokes (RANS) models. While LES is computationally more expensive than RANS, it depicts the flow structure more accurately. Therefore, it can be applied to engines in order to gain a better representation of local mixing as well as accurately simulate unsteady flow behavior in engines. In this study, various LES models have been added to the KIVA-3V code. Early injection cases have been simulated on a CAT 3401 engine mesh and comparisons made with RANS results. LES results show more detailed flow structure and therefore enable a more accurate study of mixing. Multiple cycle cases have also been simulated and compared to identify cycle to cycle variations. A grid sensitivity study for LES has also been performed. In addition to this, LES has been added to KIVA-CHEMKIN for more accurate flow representation. Currently the DOLFA technique (Haworth et al. 2003) is being added with KIVA-CHEMKIN to speed up kinetics calculations.
Recommended Content
Authors
Topic
Citation
Jhavar, R. and Rutland, C., "Using Large Eddy Simulations to Study Mixing Effects in Early Injection Diesel Engine Combustion," SAE Technical Paper 2006-01-0871, 2006, https://doi.org/10.4271/2006-01-0871.Also In
Homogeneous Charge Compression Ignition (HCCI) Combustion 2006
Number: SP-2005; Published: 2006-04-03
Number: SP-2005; Published: 2006-04-03
References
- Abraham J Bracco FV Reitz RD 1985 “Comparison of computed and measured premixed charged engine combustion” Combustion and Flame 60 1985
- Amsden AA 1997 “ KIVA-3V: A block-structured KIVA program for engines with vertical or canted valves ” Los Alamos National Laboratories 1997
- Celik I Yavuz I Smirnov A 2001 “Large eddy simulations of in-cylinder turbulence for internal combustion engines: a review” Int. J. Engine Research 2 2 119 148
- Christensen M Johansson B Einewall P 1997 “Homogeneous charge compression ignition (HCCI) using isooctane, ethanol and natural gas - a comparison with spark ignition operation” SAE paper 972874
- Chumakov S 2001 “Large-Eddy Simulation Models for Subgrid Scalar Transport” University of Wisconsin Madison
- Germano M Piomelli U Moin P Cabot WH 1991 “A Dynamic Subgrid-Scale Eddy Viscosity Model” Physics of Fluids 3 7 1760 1765
- Galperin B Orszag SA 1993 “ Large Eddy Simulation of Complex Engineering and Geophysical Flows ” Cambridge University Press
- Halstead MP Kirsch LJ Quinn CP 1997 “The autoignition of hydrocarbon fuels at high temperatures and pressures - fitting of a mathematical model” Combustion and Flame 30 45 60
- Haworth DC 1999 “Large-Eddy Simulation of In-Cylinder Flows” Oil & Gas Science and Technology 54 2 175 185
- Haworth DC Veljkovic I Plassmann PE 2003 “A Scientific On-line Database for Efficient Function Approximation” Lecture Notes in Computer Science 2667 2003 643 653
- Hinze JO 1975 “ Turbulence, 2 nd Edition ” McGraw Hill New York 1975
- Jhavar R Rutland CJ 2005 “Effects of Mixing on Early Injection Diesel Combustion” SAE Paper 2005-01-0154
- Kee RJ Rupley FM Miller JA 1989 “ CHEMKIN II: A Fortran Chemical Kinetics Package for the Analysis of Gas Phase Chemical Kinetics ” Sandia National Laboratory Report 1989
- Klingbeil AE 2002 “Particulate and NOx reduction in a heavy-duty diesel engine using high levels of exhaust gas recirculation and very early or very late start of injection” University of Wisconsin Madison
- Kong SC Han Z Reitz RD 1995 “The development and application of a diesel engine and combustion model for multidimensional engine simulation” SAE Paper 950278
- Menon S 1996 “Effect of Subgrid Models on the Computed Interscale Energy Transfer in Isotropic Turbulence” Computer and Fluids 25 2 165 180
- Miyamoto T Hayashi AK Harada A Sasaki S Akagawa H Tsujimura K 1998 “Numerical simulation of premixed lean diesel combustion in a DI engine” Proceeding of the Fourth International Symposium COMODIA 98 179 184
- Narayanaswamy K 2005
- Patel A Kong SC Reitz RD 2004 “Development and validation of a reduced reaction mechanism for HCCI engine simulations” SAE Paper 2004-01-0558
- Piomelli U 1999 “Large-eddy simulations: achievements and challenges” Prog. Aerospace Sci. 35 335 362
- Pomraning E 2000 “Development of Large Eddy Simulation Turbulence Models” University of Wisconsin Madison
- Pope SB 2000 “ Turbulent Flows ” Cambridge University Press 2000
- Ragab SA Piomelli U 1993 “ Engineering Applications of Large Eddy Simulations ” ASME Publication 162 1993
- Richards K 2001
- Rodi W Ferziger JH Breuer M Pourquie M 1997 “Status of large eddy simulation: results of a workshop” Trans. ASME, J. Fluids Engng 119 248 262
- Ryan TW Callahan TJ 1996 “Homogeneous charge compression ignition of diesel fuel” SAE Paper 961160
- Shethaji T Rutland CJ Barths H El Tahry SH Lippert A 2005 “Assessment of RANS and LES Turbulence Models: Turbulent Flow Past a Backward-Facing Step and Multidimensional Simulation of In-Cylinder Flows” SAE Paper 2005-01-0202
- Sjoberg M Edling LO Eliassen T Magnusson L Angstrom HE 2002 “GDI HCCI: Effects of injection timing and air swirl of fuel stratification, combustion and emissions formation” SAE Paper 2002-01-0106
- Smagorinsky J 1963 “General Circulation Experiments with the Primitive Equations” Monthly Weather Review 93 1963
- Sone K Menon S 2003 “Effect of Subgrid Modeling on the In-Cylinder Unsteady Mixing Process in a Direct Injection Engine” Journal of Engineering for Gas Turbines and Power 125 435 443
- Spalart PR Jou WH Strelets M Allmaras SR 1997 “Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach” 1 st AFOSR Int. Conf. On DNS/LES “ Advances in DNS/LES ” Liu C Liu Z Greyden Press Columbus OH 1997
- Xu H Fu H Williams H Shilling I 2002 “Modeling study of combustion and gas exchange in a HCCI (CAI) engine” SAE Paper 2002-01-0114
- Zhang Y Rawat R Schmidt G Haworth D Veljkovic I Plassmann P 2005 “Acceleration of detailed chemistry calculation in multi-dimensional engine modeling using DOLFA” 15 th International Multidimensional Engine Modeling User's Group Meeting 2005
- Zhao F Asmus TW Assanis DN Dec JE Eng JA Najt PM 2003 “ Homogeneous Charge Compression Ignition (HCCI) Engines ” Society of Automotive Engineers Inc. 2003
- Zhu Y Reitz RD 1999 “A 1-D gas dynamics code for subsonic and supersonic flows applied to predict EGR levels in a heavy-duty diesel engine” Int. J. of Vehicle Design 22 3 4 227 252