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Optical Investigation of the Impact of Pilot Ratio Variations on Natural Gas Diesel Dual-Fuel Combustion
Technical Paper
2019-01-1159
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Experiments were performed on a small-bore optically accessible engine to investigate diesel pilot ignition (DPI) and reactivity controlled compression ignition (RCCI) dual-fuel combustion strategies with direct injection of natural gas and diesel. Parametric variations of pilot ratio were performed. Natural luminosity and OH chemiluminescence movies of the combustion processes were captured at 28.8 and 14.4 kHz, respectively. These data were used to create ignition maps, which aided in comparing the propagation modes of the two combustion strategies. Lower pilot ratios resulted in lower initial heat release rates, and the initial ignition sites were generally smaller and less luminous; for increased pilot ratios the initial portion of the heat release was larger, and the ignition sites were large and bright. Comparisons between diesel pilot ignition and reactivity controlled compression ignition showed differences in combustion propagation mechanisms. DPI displayed a steady combustion propagation speed with regularly sized ignition sites. These sites grow into wedges that follow the shape of the diesel jets. From there, the combustion spreads to the spaces between the wedges and fills the field of view. RCCI has more dispersed ignition sites that do not necessarily correspond to the location of the diesel jets. These sites tend to grow rapidly, which suggests autoignition is the dominant combustion propagation mechanism.
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Dahl, K., Ghandhi, J., and Rothamer, D., "Optical Investigation of the Impact of Pilot Ratio Variations on Natural Gas Diesel Dual-Fuel Combustion," SAE Technical Paper 2019-01-1159, 2019, https://doi.org/10.4271/2019-01-1159.Data Sets - Support Documents
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References
- Karim G. A. The Dual Fuel Engine Automotive Engine Alternatives Evans R. L. Boston, MA Springer 1987
- Karim , G.A. Dual-Fuel Diesel Engines CRC Press 2015
- Papagiannakis , R.G. , Rakopoulos , C.D. , Hountalas , D.T. , and Rakopoulos , D.C. Emission Characteristics of High Speed, Dual Fuel, Compression Ignition Engine Operating in a Wide Range of Natural Gas/Diesel Fuel Proportions Fuel 89 1397 1406 2010
- Serrano , D. , Obiols , J. , and Lecointe , B. Optimization of Dual Fuel Diesel-Methane Operation on a Production Passenger Car Engine - Thermodynamic Analysis SAE Technical Paper, 2013-01-2505 2013 10.4271/2013-01-2505
- Liu , J. , Yang , F. , Wang , H. , Ouyang , M. , and Hao , S. Effects of Pilot Fuel Quantity on the Emissions Characteristics of a CNG/Diesel Dual Fuel Engine with Optimized Pilot Injection Timing Applied Energy 110 201 206 2013
- Badr , O. , Karim , G.A. , and Liu , B. An Examination of the Flame Spread Limits in a Dual Fuel Engine Applied Thermal Engineering 19 1071 1080 1999
- Magno , A. , Mancaruso , E. , and Vaglieco , B.M. Combustion Analysis of Dual Fuel Operation in Single Cylinder Research Engine Fuelled with Methane and Diesel SAE Technical Paper, 2015-24-2461 2015 10.4271/2015-24-2461
- Reitz , R.D. and Duraisamy , G. Review of High Efficiency and Clean Reactivity Controlled Compression Ignition (RCCI) Combustion in Internal Combustion Engines Progress in Energy and Combustion Science 46 12 71 2015
- Kokjohn , S.L. , Hanson , R.M. , Splitter , D.A. , and Reitz , R.D. Fuel Reactivity Controlled Compression Ignition (RCCI): A Pathway to Controlled High-Efficiency Clean Combustion International Journal of Engine Research 12 209 226 2011
- Kokjohn , S.L. , Hanson , R.M. , Splitter , D.A. , and Reitz , R.D. Experiments and Modeling of Dual-Fuel HCCI and PCCI Combustion Using In-Cylinder Fuel Blending SAE Int. J. Engines 2 24 39 2009
- Nieman , D.E. , Dempsey , A.B. , and Reitz , R.D. Heavy-Duty RCCI Operation Using Natural Gas and Diesel SAE Int. J. Engines 5 270 285 2012
- Carlucci , A.P. , Laforgia , D. , Saracino , R. , and Toto , G. Study of Combustion Development in Methane-Diesel Dual Fuel Engines, Based on the Analysis of In-Cylinder Luminance SAE Technical Paper, 2010-01-1297 2010 10.4271/2010-01-1297
- Dronniou , N. , Kashdan , J. , Lecointe , B. , Sauve , K. , and Soleri , D. Optical Investigation of Dual-Fuel CNG/Diesel Combustion Strategies to Reduce CO2 Emissions SAE International Journal of Engines 7 873 887 2014
- Khosravi , M. , Rochussen , J. , Yeo , J. , Kirchen , P. et al. 2016
- Kokjohn , S. , Reitz , R.D. , Splitter , D. , and Musculus , M. Investigation of Fuel Reactivity Stratification for Controlling PCI Heat-Release Rates Using High-Speed Chemiluminescence Imaging and Fuel Tracer Fluorescence SAE International Journal of Engines 5 248 269 2012
- Tang , Q. , Liu , H. , and Yao , M. Simultaneous Measurement of Natural Flame Luminosity and Emission Spectra in a RCCI Engine under Different Fuel Stratification Degrees SAE International Journal of Engines 10 1155 1162 2017
- Mancaruso , E. and Vaglieco , B.M. UV-Visible Imaging of PCCI Engine Running with Ethanol/Diesel Fuel 2012
- Dahl , K.R. 2018
- Bowditch , F.W. A New Tool for Combustion Research - a Quartz Piston Engine SAE Technical Paper 610002 1961 10.4271/610002
- Gaydon , A.G. The Spectroscopy of Flames London, New York Chapman and Hall; Halsted Press Division 1974
- Arias-Castro , E. and Donoho , D.L. Does Median Filtering Truly Preserve Edges Better than Linear Filtering? The Annals of Statistics 37 1172 1206 2009