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A Phenomenological Model for Soot Formation and Oxidation in Direct-Injection Diesel Engines
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Abstract
The concentration of carbonaceous particulate matter in the exhaust of diesel engines depends on the rates of formation and oxidation of soot in the combustion chamber. Soot forms early in the combustion process when local fuel-rich areas exist, whereas soot oxidation occurs later when more air is entrained into the fuel spray. Based on this understanding, a phenomenological combustion model is established. In the model, the cylinder volume is divided into four zones: a rich fuel spray core, a premixed-burning/burned gas zone, a mixing controlled burning zone and a lean air zone. Soot formation takes place in the mixing controlled burning zone where the local C/O ratio is above the critical value. Soot oxidation occurs in the premixed-burning/burned gas zone as air is entrained. By using a quasi-global chemical reaction scheme, the oxidation of soot particles by different species can be investigated. The model predictions were compared with the measured cylinder pressure and exhaust emission data. A reasonably good agreement was observed. A number of oxidation rates cited in the literature were tested in this model. It was found that the oxidation rate established by Nagle and Strickland-Constable adequately accounted for the apparent soot oxidation rate under diesel engine conditions.
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Li, X. and Wallace, J., "A Phenomenological Model for Soot Formation and Oxidation in Direct-Injection Diesel Engines," SAE Technical Paper 952428, 1995, https://doi.org/10.4271/952428.Also In
References
- Abramowitz G.N. The Theory of Turbulent Jets MIT Press 1963
- Amann C.A. Siegla D.C. “Diesel Particulates - What They Are and Why” Aerosol Science and Technology 1 73 101 1982
- Amsden A. Butler T. O'Rourke P.J. “The KIVA-II Computer Program for Transient Multidimensional Chemically Reactive Flow with Sprays” SAE Paper 872072 1987
- Baulch D.L. Cobos C. Cox R. Frank P. Hayman G. Just T. Kerr J. Murrells T. Pilling M. Troe J. Walker R.W. Warnatz J. “Summary Table of Evaluated Kinetic Data for Combustion Modeling: Supplement 1” Combustion and Flame 98 59 79 1994
- Bradley D. Dixon-Lewis G. Habik S.E. Mushi E.M.J. “The Oxidation of Graphite Powder in Flame Reaction Zones” Twentieth Symposium (Inter.) on Combustion/The Combustion Institute 931 940 1984
- Chiu W.S. Shahed S.M. Lyn W.T. “A Transient Spray Mixing Model for Diesel Combustion” SAE Paper 760128 1976
- Dec J.E. Espey C. “Soot and Fuel Distriutions in a D.I. Diesel Engine via 2-D Imaging” SAE Paper 922307 1992
- Dent J. Mehta P.S. “Phenomenological Combustion Model for a Quiescent Chamber Diesel Engine” SAE Paper 811235 1981
- Dent J.C. “A Basis for the Comparison of Various Experimental Methods for Studying Spray Penetration” SAE Paper 710571 1971
- Dillies B. Karx K. Dec J. Espey C. “Diesel Engine Combustion Modeling Using the Coherent Flame Model in KIVA-II” SAE Paper 930074 1993
- Du C.J. Kittelson D.B. “Total Cylinder Sampling from a Diesel Engine: Part III - Particle Measurements” SAE Paper 830243 1983
- Glassman I. Combustion Academic Press, Inc. second 1987
- Gülder Ö.L. Smallwood G.J. Snelling D.R. “Diesel Spray Structure Investigation by Laser Diffraction and Sheet Illumination” SAE Paper 920577 1992
- Heywood J.B. Internal Combustion Engine Fundamentals McGraw-Hill, Inc. 1988
- Hiroyasu H. Kadota T. Arai M. “Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emissions (part 1)” Bulletin of the JSME 26 214-12 April 1983
- Kamimoto T. Chang Y.J. Kobayashi H. “Rate of Heat Release and Its Prediction of a Diesel Flame in a Rapid Compression Machine” SAE Paper 841076 1984
- Kee R. Miller J. Jefferson T.H. “CHEMKIN: A General-Purpose, Problem-Independent, Transportable, Fortran Chemical Kinetics Code Package”. 1980
- Khan I.M. Wang C.H.T. “Coagulation and Combustion of Soot Particles in Diesel Engines” Combustion and Flame 17 0 409 1971
- Kittelson D.B. Pipho M.J. Ambs J.L. Luo L. “In-Cylinder Measurements of Soot Production in a Direct-Injection Diesel Engine” SAE Paper 880344 1988
- Kittelson D.B. Sun R. Blachshear P.L.J. Brehob D.D. “Oxidation of Soot Agglomerates in a Direct Injection Diesel Engine” SAE Paper 920111 1992
- Kuniyoshi H. Tanabe H. Takeshi Sato G. Fujimoto H. “Investigation on the Characteristics of Diesel Fuel Spray” In New Diesel Engines, Combustion,and Emissions Research in Japan 77 93 SAE SP468 1980 SAE Paper 800968
- Lewis J.B. “Thermal Gas Reactions of Graphite” 129 199 Academic Press 1970
- Li X.B. Soot Formation and Oxidation in DI Diesel Engines The University of Toronto 1995
- Li X.B. Wallace J.S. “In-Cylinder Measurement of Temperature and Soot Concentration Using the Two-Color Method” SAE Paper 950848 1995
- Matsuoka S. Yoshizaki T. “Model Verification of Burned Gas Re-Entrainment Phenomenon and the Soot Formation Mechanism in Diesel Combustion (Free Spray Flame in Rapid Compression Chamber)” SAE Paper 890440 1989
- Morel T. Keribar R. “Heat Radiation in D.I. Diesel Engines” SAE Paper 860445 1986
- Nagle J. Strickland- Constable R.F. “Oxidation of Carbon between 1000-2000C” Proceedings of Fifth Conference on Carbon 1 154 1962
- Newman J.A. Brzustowksi T.A. “Behavior of a Liquid Jet Near the Thermodynamic Critical Region” AIAA Journal 9 1595 1971
- Ng H.K. Borman G.L. “The Effects of Fuel Aromatic Structure on Diesel Combustion” International Symposium on Diagnostics and Modeling of Combustion in Reciprocation Engines Tokyo 1985
- Patterson M. Kong S.-C. Hampson G.J. Reitz R.D. “Modeling the Effects of Fuel Injection Characteristics on Diesel Engine Soot and NO x Emissions” SAE Paper 940523 1994
- Shiozaki T. “Observation of Combustion Process in D.I. Diesel Engine via High Speed Direct and Schilieren Photography” SAE 1980 Transactions 89 91 103 1980 SAE Paper 800025
- Slack M.W. Grillo A.R. “Shock Tube Investigation of Methane-Oxygen Ignition Sensitized by NO 2 ” Combustion and Flame 40 155 172 1981
- Takeuchi K. Senda J. Shikuya AI. “Transient Characteristics of Fuel Atomization and Droplet Size Distribution in Diesel Fuel Spray” SAE Paper 830449 1983
- Thermodynamics Research Center, The Texas A & M Univ. TRC Thermodynamic Tables, Hydrocarbons 1985
- Wade W. Hunter C. Trinker F. Cikanek H. “Reduction of NO x and Particulate Emissions in the Diesel Combustion Process” Trans. of the ASME, J. of Eng. for Gas Turbs. and Pwr. 109 426 434 1987
- Warnatz J. “Chemistry of High Temperature Combustion of Alkanes up to Octane” Twentieth Symposium (Inter.) on Combustion/The Combustion Inst. 845 856 1984
- Westbrook C.K. Dryer F.L. “Simplified Reaction Mechanisms for the Oxidation of Hydrocarbon Fuels in Flames” Combustion Science and Technology 27 31 43 1981