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Modeling NOx Formation in a Small Bore, Lean Natural Gas, Spark Ignition Engine
Technical Paper
1999-01-3480
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Legislation limiting NOx emissions from natural gas engines dictate a need for greater understanding of the mechanisms governing its formation, and more accurate models for predicting its dependence on the engine design and operating parameters. This work concerns the application of a one-dimensional, multi-zone, thermochemical model for calculating NO formations from a small bore, lean burning, natural gas engine. Because of the potential for significant non equilibrium behavior due to lean operation, high engine speeds and small combustion chamber sizes, detailed chemical kinetic mechanisms are used to integrate the reaction rates over the duration of the product combustion history. The model is used to predict NO emission at two lean conditions: ϕ = 0.91 and ϕ = 0.66. Results show good agreement with the experimental data, with better agreement for the higher equivalence ratio case for conditions which are investigated in detail and are related to the mechanism governing the net formation rate in each case. We show that the richer mixture produces NO by processes which are formation limited in the colder, later burned region, and decomposition limited in the hotter, earlier burned region. In the lean engine, however, NO is formed solely via a formation limited process. The results suggest several avenues to reducing both the absolute value of NO concentration in the exhaust by changing the design and/or operating parameters, as well as the specific NO formation.
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Citation
Golub, A. and Ghoniem, A., "Modeling NOx Formation in a Small Bore, Lean Natural Gas, Spark Ignition Engine," SAE Technical Paper 1999-01-3480, 1999, https://doi.org/10.4271/1999-01-3480.Data Sets - Support Documents
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References
- Newhall, H. 12th International Symposium on Combustion 603 1968
- Lavioe, G. Heywood, J. B. et al. Combustion Science and Technology 1 313 1970
- Aiman, W. 14th International Symposium on Combustion 861 1972
- Heywood, J. B. Higginis et al SAE paper 790291 1979
- Raine, R. R. et al. Combustion and flame 102 241 1995
- Miller, J. A. Bowman, C. T. Mechanism and Modeling of Nitrogen Chemistry in Combustion Progress in Engineering Combustion and Science 15 287 1989
- Bowman, C. T. 24Th International Symposium on Combustion 859 878 1992
- Glarborg, P. Miller, J. A. et al. Combustion and Flame 65 177 202 1986
- Corr et al. Journal of Engineering for Gas Turbines and Power 114 425 434 1992
- Leonard, G. Correa, S. 13th Annual Energy Sources Technology Conference and Exhibition, Fossil Fuel Combustion Symposium New Orleans, LA 69 74 1990
- Flagan, R.C. et al Fundamentals of Air Pollution Engineering Prentice Hall New Jersey 1988
- Hanson, R. K. et al Combustion Chemistry Gardener, W. 361 421 1989
- Daneshyar, H et al Combustion and Flame 21 395 1973
- Komiyama, K. et al SAE paper 730475 1973
- Keck, J. C. et al Combustion and Flame 17 237 1971
- Delichatsios, M. MIT Dept of Mech Eng 1972
- Gad El-Mawla, A. et al 1965
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw Hill New York 1988
- Kee, R. et al. Sandia Report 89-8009 1989
- Lutz, A. et al Sandia Report 87-8248 1987
- Ramos, J. Internal Combustion Engine Modeling Hemisphere New York 1989
- Heywood, J. 14th International Symposium on Combustion 1972
- Blumberg, P et al Combustion Science and Technology 4 73 1971
- Fergusen, C. Internal Combustion Engines Wiley and Sons New York 1986
- Stone, R. Introduction to Internal Combustion Engines 2nd Macmillan Basingstoke 1992
- Van Wylen, 0. Fundamentals of Classical Thermodynamics 1986
- Thijssen, J. H. MIT Dept of Chemical Engineering 1993
- Taylor, C. The Internal Combustion Engine in Theory and Practice MIT press Cambridge 1985
- Borman, G. Kazuie Nishiwaaki Internal Combustion Engine Heat Transfer Progress in Energy and Combustion Science 13 1 1987
- Steinfeld, J.I. et al Chemical Kinetics and Dynamics Prentice Hall New Jersey 1989
- Turk, S.L. MIT Dept of Mechanical Engineering 1972
- Poulos, S. G et al SAE paper 830334 1983