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Numerical Analysis of Combustion and Emissions Formation in a Heavy Duty DME Engine
Technical Paper
2012-01-0156
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
When using dimethyl ether (DME) to fuel diesel engines at high load and speed, applying high amounts of exhaust gas recirculation (EGR) to limit NOX emissions, carbon monoxide (CO) emissions are generally high. To address this issue, the combustion and emission processes in such engines were analyzed with the three-dimensional CFD KIVA3V code. The combustion sub-mechanism (76 species and 375 reactions) was validated by comparing simulated ignition delays and flame velocities to reference data under diesel-like and atmospheric conditions, respectively. In addition, simulated and experimentally determined rate of heat release (RoHR) curves and emission data were compared for a heavy-duty single-cylinder DME engine (displaced volume, 2.02 liters) with DME-adapted piston and nozzle geometries. The simulated RoHR curves captured the main features of the experimentally measured curves, but deviated in the premixed (higher peak) and late combustion phases (too high). The simulated NOX and CO emissions under EGR conditions were predicted well. However, CO emissions were too high under non-EGR conditions, probably because the CFD code does not capture the latest part of the combustion process accurately. Parametric equivalence ratio-temperature distributions (plotted on emission maps of CO, formaldehyde, methane, NO and soot), crank-angle-resolved emissions and RoHR curves indicate that as load and speed increase larger fractions of in-cylinder masses are located in relatively rich regions during the diffusion combustion phase, thus promoting the formation of CO, formaldehyde and methane. Consequently, to reduce these emissions the combustion system must be able to limit the formation of excessively rich conditions during later parts of the diffusion combustion phase, which can be achieved by entraining larger amounts of air in the sprays and adapting the piston bowl geometry to increase flame/air interfaces.
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Salsing, H., Golovitchev, V., and Denbratt, I., "Numerical Analysis of Combustion and Emissions Formation in a Heavy Duty DME Engine," SAE Technical Paper 2012-01-0156, 2012, https://doi.org/10.4271/2012-01-0156.Also In
References
- Sorenson, S. C. Mikkelsen, S-E. “Performance and Emissions of a 0.273 Liter Direct Injection Engine Fuelled with Neat Dimethyl Ether,” SAE Technical Paper 950064 1995 10.4271/950064
- Fleisch, T. Charbonneau, P. Mikkelsen, S-E. McCandless, J. C. et al. “A New Clean Diesel Technology: Demonstration of ULEV Emissions on a Navistar Diesel Engine Fueled with Dimethyl Ether,” SAE Technical Paper 950061 1995 10.4271/950061
- Kapus, P. E. Cartellieri, W. P. “ULEV Potential of a DI/TCI Diesel Passenger Car Engine Operated on Dimethyl Ether,” SAE Technical Paper 952754 2005 10.4271/952754
- Hansen, J. B. Voss, B. Joensen, F. Sigurðardóttir, I. D. “Large Scale Manufacture of Dimethyl Ether - a New Alternative Diesel Fuel from Natural Gas,” SAE Technical Paper 950063 1995 10.4271/950063
- Consonni, S. Katofsky, R. E. Larson, E. D. “A gasification-based biorefinery for the pulp and paper industry” Chemical Engineering Research and Design 87 9 1293 1317 2009 10.1016/j.cherd.2009.07.017
- “Well-to-Wheels Analysis of Future Automotive Fuels and Powertrain in the European Context” http://ies.jrc.ec.europa.eu/uploads/media/WTW_Report_010307.pdf August 2011
- Wetterlund, E. Pettersson, K. Harvey, S. “Systems analysis of integrating biomass gasification with pulp and paper production - Effects on economic performance, CO2 emissions and energy use” Energy 36 2 932 941 2011 10.1016/j.energy.2010.12.017
- An, B-I. Sato, Y. Lee, S-W. Takayanagi, T. “Effects of Injection Pressure on Combustion of a Heavy Duty Diesel Engine With Common Rail DME Injection Equipment,” SAE Technical Paper 2004-01-1864 2004 10.4271/2004-01-1864
- Brusstar, M. J. Hamady, F. J. Schaefer, R. M. “Low Engine-Out NOx Emissions with DME Using High Pressure Injection,” SAE Technical Paper 2007-01-4093 2007 10.4271/2007-01-4093
- “DME Combustion Improvement with a High-Pressure Common-Rail Fuel Injection System” Engine Technology Progress in Japan - Alternative Fuels and Engines, ETPJ number 12005105 2005
- Salsing, H. Denbratt, I. “Performance of a Heavy Duty DME Diesel Engine - an Experimental Study,” SAE Technical Paper 2007-01-4167 2007 10.4271/2007-01-4167
- Salsing, H. Yudanov, S. Denbratt, I. “Development of a Heavy Duty DME Combustion System” 2011
- Patterson, M. A. Reitz, R. D. “Modeling the Effects of Fuel Spray Characteristics on Diesel Engine Combustion and Emission,” SAE Technical Paper 980131 1998 10.4271/980131
- Golovitchev, V. I. Nordin, N. Jarnicky, R. Chomiak, J. “3-D Diesel Spray Simulations Using a New Detailed Chemistry Turbulent Combustion Model,” SAE Technical Paper 2000-01-1891 2000 10.4271/2000-01-1891
- Kim, H.J. Suh, H.K. Lee, C.S. “A study on an application of a hybrid break-up model for dimethyl ether atomization in a common-rail injection system” Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 223 10 1351 1359 2009 10.1243/09544070JAUTO1159
- Curran, H.J. Pitz, W.J. Westbrook, C.K. Dagaut, P. Boettner, J-C. Cathonnet, M. A. “A Wide Range Modeling Study of Dimethyl Ether Oxidation” Intern. Journ. Chem. Kinetics 30 3 229 241 1998 10.1002/(SICI)1097-4601(1998)30:3<229::AID-KIN9>3.0.CO;2-U
- Edgar, B. L. Dibble, R. W. Naegeli, D. W. “Auto-ignition of Dimethyl Ether and Dimethoxy Methane Sprays at High Pressures,” SAE Technical Paper 971677 1997 10.4271/971677
- Burcat database ftp://ftp.technion.ac.il/pub/supported/aetdd/thermodvnamics/BURCAT.THR Sep. 2011
- Lutz, A.E. Kee, R.J. Miller, J.A. “SENKIN: A Fortran Program for Predicting Homogeneous Gas Phase Chemical Kinetics with Sensitivity Analysis” SAND Report SAND87-8248 1994
- Daly, C.A. Djebaili-Chaumeix, N. Paillard, C. Simmie, J.M. Wuermel, J. “Burning Velocities of Dimethyl Ether + Air” Internal Report of Department of Chemistry National University of Ireland 2001
- Yudanov, S. “Fuel injection system suitable for low-viscosity fuels” US Patent. 7 549 410B2 2009
- Konno, M. Kajitani, S. Suzuki, Y. “Unburned Emissions from a DI Diesel Engine Operated with Dimethyl Ether” Proceedings of The 15 th Internal Combustion Engine Symposium Seoul, Korea July 13 16 1999
- Akihama, K. Takatori, Y. Inagaki, K. Sasaki, S. Dean, A. “Mechanism of the Smokeless Rich Diesel Combustion by Reducing Temperature,” SAE Technical Paper 2001-01-0655 2001 10.4271/2001-01-0655
- Bergman, M. Golovitchev, V.I. “Application of Transient Temperature vs. Equivalence Ratio Emission Maps to Engine Simulations,” SAE Technical Paper 2007-01-1086 2007 10.4271/2007-01-1086
- Gordon, S. McBride, B.J. “Computer Program for Calculating of Complex Chemical Equilibrium Compositions and Applications I. Analysis” NASA Reference Publication 1311 1994
- Mueller, C. J. “The Quantification of Mixture Stoichiometry When Fuel Molecules Contain Oxidizer Elements or Oxidizer Molecules Contain Fuel Elements,” SAE Technical Paper 2005-01-3705 2005 10.4271/2005-01-3705
- Salsing, H. “DME Combustion in Heavy Duty Diesel Engines” Ph.D. thesis Department of Applied Mechanics, Chalmers University of Technology Gothenburg 2011