This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature
Technical Paper
2001-01-0655
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
Recently, the smokeless rich diesel combustion had been demonstrated [1]. This can realize smokeless and NOx-less combustion by using a large amount of cooled EGR under a near stoichiometric and even in a rich operating condition. We focus on the effects of reducing diesel combustion temperature on soot reduction. In this paper, the smoke suppression mechanism in the smokeless rich combustion, where the temperature is reduced by higher EGR rate, is analyzed by the following procedure.
- (1)ϕ (equivalence ratio) - T (temperature) map, which shows soot formation tendencies as a function of ϕ and T, was made using zero dimensional calculations with a detailed chemical kinetic model including PAH (polycyclic aromatic hydrocarbons) formation, soot particle nucleation, growth and surface oxidation.
- (2)The combustion processes of the smokeless and conventional diesel combustion were simulated by the 3D-CFD KIVA2 code.
- (3)In-cylinder conditions of smokeless and conventional combustion predicted by 3D-CFD were plotted on the ϕ -T map to investigate their behaviors and differences on the map.
The following results were obtained.
- (a)According to 3D-CFD, there is little difference in mixture formation between the smokeless and conventional combustion. It is calculated that the temperature of the smokeless combustion with higher EGR rate is significantly reduced compared with that of conventional one.
- (b)The smokeless combustion proceeds so as to avoid soot formation regions on the ϕ -T map in contrast to the conventional one, due to this significant temperature reduction.
- (c)The smoke suppression is realized by the combustion taking place at temperatures below that needed to form soot. In such lower temperature region, the soot formation itself can be suppressed because the reactions forming soot particles from PAH do not progress even if the rich combustion occurs. This shows the reason why the smokeless rich combustion was realized without regard to the improvement of the mixture formation.
Recommended Content
Authors
Citation
Akihama, K., Takatori, Y., Inagaki, K., Sasaki, S. et al., "Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature," SAE Technical Paper 2001-01-0655, 2001, https://doi.org/10.4271/2001-01-0655.Also In
References
- Sasaki, S. Ito, T. Iguchi, S. “Smoke-less Rich Combustion by Low Temperature Oxidation in Diesel Engines” 9.Aachen Colloquium Automobile and Engine Technology 2000 767 2000
- 1998
- Frenklach, M. Taki, S. Durgaprasad, M.B. Matula, R.A. “Soot Formation in Shock-Tube Pyrolysis of Acetylene, Aliene, and 1.3-Butadiene” Combustion and Flame 54 1983 81
- Takatori, Y. Mandokoro, Y. Akihama, K. Nakakita, K. Tsukasaki, Y. Iguchi, S. Yeh, L.I. Dean, A.M. “Effect of Hydrocarbon Molecular Structure on Diesel Exhaust Emissions” SAE paper 982495
- Han, Z. Uludogan, A. Hampson, G.J Reitz, R.D. “Mechanism of Soot and NOx Emission Reduction Using Multiple-Injection in a Diesel Engine” SAE paper 960633
- Beatrice, C. Belardini, P. Bertoli, C. Giacomo N.D. “New Trends IN Combustion System Design OF Light Duty Diesel Engines Inferred BY Threedimentional C.F.D. Computations” SAE paper 982461
- Frenklach, M. Wang, H. “Soot Formation in Combustion” Bockhorn, Springer-Verlag Berlin 165 1994
- Kazakov, A. Foster, D.E. “Modeling of Soot Formation During DI Diesel Combustion Using A Multi-Step Phenomenological Model” SAE paper 982463
- Yoshihara, Y. Kazakov, A. Wang, H. Frenklach, M. “Reduced Model of Soot Formation: Application to the Natural Gas-Fueled Diesel Combustion” Twenty-Fifth Symposium (International) on Combustion The Combustion Institute Pittsburgh 9412 1994
- Kmimoto, T. Bae, M. “High Combustion Temperature for the Reduction of Particulate in Diesel Engines” SAE paper 880423
- Nakakita, K. Kondoh, T. Watanabe, S. “A Study on Diesel Combustion with High-Pressure Fuel Injection” Transaction of the Japan Society of Mechanical Engineers 60-577 1994 3198
- Mims, C. A. Mauti, R. Dean, A. M. Rose, K. D. “Radical Chemistry in Methane Oxidative Coupling-Tracing of Ethylene Secondary Reactions with Computer Models and Isotopes” J. Phys. Chem. 98 13357 1994
- Beatrice, C. Belardini, P. Bertoli, C. Cameretti, M.C. Cirillo, N.C. “Fuel Jet Models for Multidimensional Diesel Combustion Calculation:An Update” SAE paper 950086
- Halsted, M.P. Kirsch, L.J. Quinn, C. P. “The Autoiginition of Hydrocarbon Fuels at High Temperatures and Pressurees-Fitting of a Mathematical Model” Combustion and Flame 30 45 1997
- Kong, S.-C. Han, Z. Reitz, R.D. “The Development and Application of a Diesel Ignition and Combustion Model for Multidimensional Engines Simulation” SAE paper 950278
- Xin J. Montgometry, D. Han, Z. Reitz, R.D. “Multidimensional Modeling of Combustion for a Six-Mode Emissions Test Cycle on a DI Diesel Engine” Journal of Engineering for Gas Turbines and Power 119 683 1997
- Thring, R. H. “Homogeneous-Charge Compression-Ignition(HCCI) Engines” SAE paper 892068
- Ryan, T.W. III Callahan, T.J. “Homogeneous Charge Compression Ignition of Diesel Fuel” SAE paper 961160
- Kämer M. Abthoff J. Duvinage F. Krutzsch B. Liebscher T. “Possible Exhaust Gas After treatment Concepts for Passenger Car Diesel Engines with Sulphur-free Fuel” SAE paper 1999-01-1328
- Ptt E. Splisteser G. Bosse R. König A. Quissek E.-J. Kutschera I. “Potential of NOx-Trap Catalyst Appication for DI-Diesel Engines” 20th Vienna Motor Symposium
- Cartus T Strigl T Neunteufl K. Herzog P. “The clean and efficient HSDI-diesel using NOx-adsorber technology” 21th Viena Motor Symposium
- Sasaki, S. Ito, T. Iguchi, S. “Smoke-less Rich Combustion by Low Temperature Oxidation in Diesel Engines” 9.Aachen Colloquium Automobile and Engine Technology 2000 767 2000
- Mims, C. A. Mauti, R. Dean, A. M. Rose, K. D. “Radical Chemistry in Methane Oxidative Coupling-Tracing of Ethylene Secondary Reactions with Computer Models and Isotopes” J. Phys. Chem. 98 13357 1994
- B2 Dean, A. M. Bozzelli, J. W. “Combustion Chemistry of Nitrogen” in Gas-Phase Combustion Chemistry Gardiner, W. C. Jr. 125 341 2000
- Baulch, D. L. Cobos, C. J. Cox, R. A. Esser, C. Frank, P. Just, T. Kerr, J. A. Pilling, M. J. Troe, J. Walker, R. W. Warnatz, J. 1992 “Evaluated Kinetic Data For Combustion Modeling.” J. Phys. Chem. Ref. Data 21 411 734
- Tsang, W. Hampson, R. F. 1986 “Chemical Kinetic Data Base for Combustion Chemistry. Part 1. Methane and Related Compounds.” J. Phys. Chem. Ref. Data 15 1087 1279
- Lay, T. H. Bozzelli, J. W. Dean, A. M. Ritter, E. R. “Hydrogen Atom Bond Increments for Calculation of Thermodynamic Properties of Hydrocarbon Radical Species” J. Phys. Chem. 99 14514 14527 1995
- GRI 1995
- B7 Frenklach, M. Warnatz, “Detailed Modeling of PAH Profiles in a Sooting Low-Pressure Acetylene Flame” J. Combust. Sci. Tech. 51 265 283 1987
- Frenklach, M. Wang, H. “Soot Formation in Combustion” Bockhorn, Springer-Verlag Berlin 165 192 1994
- Markatou, P. Wang, H. Frenklach, M. Combust. Flame 93 467 482 1993
- Frenklach, M. Wang, H. Twenty-Third Symposium (International) on Combustion The Combustion Institute Pittsburgh 1559 1556 1991
- Kazakov, A. Frenklach, M. “Dynamic Modeling of Soot Particle Coagulation and Aggregation: Implementation With the Method of Moments and Application to High-Pressure Laminar Premixed Flames” Combust. Flame 114 484 501 1998