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Optical Investigation of Ignition Timing and Equivalence Ratio in Dual-Fuel CNG/Diesel Combustion
Technical Paper
2016-01-0772
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Dual-fuel engines are recognized as a short-medium term solution to reduce fuel consumption and pollutant emissions of CI engines, while maintaining high energy efficiency. Methane (CH4) was chosen as it offers the best compromise between its heating value and H/C ratio. The high auto-ignition temperature of CH4 requires auto-igniting a small quantity of liquid diesel before it initiates the combustion of the mixture. Therefore, new engine operations need to be specifically developed. This investigation explores the impact of time sequences of injection of the liquid fuel on the ignition of homogenous methane/air mixture. Experiments were performed on a Rapid Compression Expansion Machine (RCEM), to reproduce the operating and dynamic conditions encountered in a diesel engine cycle, allowing visualizations of fuel injection and combustion processes through a transparent piston. For the purpose of this work, the RCEM was modified to operate under dual-fuel conditions, while controlling the amount of diesel and methane-gas fueled. Experiments were performed for a wide range of equivalence ratios of the premixed charge. The study of the liquid fuel penetration and its consequence on igniting the homogenous charge was achieved using high-speed optical diagnostics. High-speed Schlieren technique (∼22 kHz) was applied to characterize the diesel spray penetration, as well as the in-cylinder liquid fuel distribution. High-speed shadowgraphy and OH*-chemiluminescence techniques were used to determine ignitions delays. Moreover, the latest diagnostic was used to analyze the flame structure propagation and the heat release evolution.
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Salaun, E., Apeloig, J., Grisch, F., Yvonnet, C. et al., "Optical Investigation of Ignition Timing and Equivalence Ratio in Dual-Fuel CNG/Diesel Combustion," SAE Technical Paper 2016-01-0772, 2016, https://doi.org/10.4271/2016-01-0772.Also In
References
- Karim G. Dual fuel Diesel engines CRC Press, Taylor & Francis Group Boca Raton, FL 2015
- Ando H. Lean burn combustion engines IMechE Seminar Publications 1996
- Soylu S. Examination of combustion characteristics and phasing strategies of a natural gas HCCI engine Energy Convers Management 46 101 19 2005 10.1016/j.enconman.2004.02.013
- Takashima , Y. , Tanaka , H. , Sako , T. , and Furutani , M. Evaluation of Engine Performance and Combustion in Natural Gas Engine with Pre-Chamber Plug under Lean Burn Conditions SAE Int. J. Engines 8 1 221 229 2015 10.4271/2014-32-0103
- Weaver , C. and Turner , S. Dual Fuel Natural Gas/Diesel Engines: Technology, Performance, and Emissions SAE Technical Paper 940548 1994 10.4271/940548
- Gibson C. , Polk A. , Shoemaker N. , Srinivasan K. et al. Comparison of propane and methane performance and emissions in a turbocharged direct injection dual fuel engine Trans ASME, J. Eng. Gas Turbines Power 133 9 092806 2011 10.1115/1.4002895
- Poonia , M. , Ramesh , A. , and Gaur , R. Experimental Investigation of the Factors Affecting the Performance of a LPG - Diesel Dual Fuel Engine SAE Technical Paper 1999-01-1123 1999 10.4271/1999-01-1123
- Papagiannakis R. and Hountalas D. Experimental investigation concerning the effect of natural gas percentage on performance and emissions of a DI dual fuel diesel engine Appl. Thermal Eng. 23 353 365 2003 10.1016/j.ijhydene.2013.11.124
- Stewart J. , Clarke A. , and Chen R. An experimental study of the dual-fuel performance of a small compression ignition diesel engine operating with three gaseous fuels Proc. IMechE Part D: J Automobile Engineering 221 8 943 956 2007 10.1243/09544070JAUTO458
- Abd Alla , G. , Soliman , H. , Badr , O. , and Abd Rabbo , M. Effect of Pilot Fuel Quantity on the Performance of a Dual Fuel Engine SAE Technical Paper 1999-01-3597 1999 10.4271/1999-01-3597
- Lata D. and Misra A. Analysis of ignition delay period of a dual fuel engine with hydrogen and LPG as secondary Fuels Int. J. Hydrogen Energy 36 5 3746 3756 2010 10.1016/j.ijhydene.2010.12.075
- Carlucci A. , Laforgia D. , Saracino R. , and Toto G. Combustion and emissions control in diesel-methane dual fuel engines: the effects of methane supply method combined with variable in-cylinder charge bulk motion Energy Conversion Manag. 52 8-9 3004 3017 2011 10.1016/j.enconman.2011.04.012
- Gatts T. , Liu S. , Liew C. , Ralston B. et al. An experimental investigation of incomplete combustion of gaseous fuels of a heavy-duty diesel engine supplemented with hydrogen and natural gas Int. J. Hydrogen Energy 37 9 7848 7859 2012 10.1016/j.ijhydene.2012.01.088
- Goldsworthy L. Combustion behaviour of a heavy duty common rail marine diesel engine fumigated with propane Exp. Thermal Fluid Sci. 42 93 106 2012 10.1016/j.expthermflusci.2012.04.016
- Kusaka J. , Okamoto T. , Daisho Y. , Kihara R. et al. Combustion and Exhaust Gas Emission Characteristics of a Diesel Engine Dual-Fueled with Natural Gas JSAE 21 489 496 2000 10.1016/S0389-4304(00)00071-0
- Badr O. , Karim G. and Liu B. An Examination of the Flame Spread Limits in a Dual Fuel Engine Applied Thermal Engineering 19 107 1080 1999 10.1016/S1359-4311(98)00108-2
- Dronniou , N. , Kashdan , J. , Lecointe , B. , Sauve , K. et al. Optical Investigation of Dual-fuel CNG/Diesel Combustion Strategies to Reduce CO2 Emissions SAE Int. J. Engines 7 2 873 887 2014 10.4271/2014-01-1313
- Sahoo B. , Sahoo N. , and Saha U. Effect of Engine Parameters and Type of Gaseous Fuel on the Performance of Dual-Fuel Gas diesel Engines - A Critical Review Renewable and Sustainable Energy Reviews 13 1151 1184 2009 10.1016/j.bbr.2011.03.031
- Serrano D. and Lecointe B. Exploring the Potential of Dual Fuel diesel-CNG Combustion for Passenger Car Engine Proceedings of the FISITA 2012 World Automotive Congress 2012 10.1007/978-3-642-33777-2_11
- Ishiyama , T. , Kang , J. , Ozawa , Y. , and Sako , T. Improvement of Performance and Reduction of Exhaust Emissions by Pilot-Fuel-Injection Control in a Lean-Burning Natural-Gas Dual-Fuel Engine SAE Int. J. Fuels Lubr. 5 1 243 253 2012 10.4271/2011-01-1963
- Königsson , F. , Stalhammar , P. , and Angstrom , H. Characterization and Potential of Dual Fuel Combustion in a Modern Diesel Engine SAE Technical Paper 2011-01-2223 2011 10.4271/2011-01-2223
- Elliot M. and Davis R. Dual fuel combustion in diesel engines Ind. Eng. Chem. 43 2854 2863 1953 10.1021/ie50504a056
- Ding , X. and Hill , P. Emissions and Fuel Economy of a Prechamber Diesel Engine with Natural Gas Dual Fuelling SAE Technical Paper 860069 1986 10.4271/860069
- Karim , G. An Examination of Some Measures for Improving the Performance of Gas Fuelled Diesel Engines at Light Load SAE Technical Paper 912366 1991 10.4271/912366
- Egúsquiza , J. , Braga , S. , Braga , C. , Villela , A. et al. Experimental Investigation of the Natural Gas / Diesel Dual-Fuel Combustion Using a Rapid Compression Machine SAE Technical Paper 2011-36-0360 2011 10.4271/2011-36-0360
- Kikusato , A. , Fukasawa , H. , Nomura , K. , Kusaka , J. et al. A Study on the Characteristics of Natural Gas Combustion at a High Compression Ratio by Using a Rapid Compression and Expansion Machine SAE Technical Paper 2012-01-1651 2012 10.4271/2012-01-1651
- Schlatter , S. , Schneider , B. , Wright , Y. , and Boulouchos , K. Experimental Study of Ignition and Combustion Characteristics of a Diesel Pilot Spray in a Lean Premixed Methane/Air Charge using a Rapid Compression Expansion Machine SAE Technical Paper 2012-01-0825 2012 10.4271/2012-01-0825
- Zhao , H. Laser Diagnostics and Optical Measurement Techniques in Internal Combustion Engines Warrendale SAE International 2012 10.4271/R-406
- Espey , C. and Dec , J. The Effect of TDC Temperature and Density on the Liquid-Phase Fuel Penetration in a D. I. Diesel Engine* SAE Technical Paper 952456 1995 10.4271/952456
- Siebers , D. Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization SAE Technical Paper 1999-01-0528 1999 10.4271/1999-01-0528
- Pastor J.V. , García-Oliver J.M. , Nerva J.-G. , and Giménez B. Fuel effect on the liquid-phase penetration of an evaporating spray under transient diesel-like conditions Fuel 90 11 2011 3369 3381 10.1016/j.fuel.2011.05.006