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Relative Impact of Chemical and Physical Properties of the Oil-Fuel Droplet on Pre-Ignition and Super-Knock in Turbocharged Gasoline Engines
Technical Paper
2016-01-2278
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A conceptual approach to help understand and simulate droplet induced pre-ignition is presented. The complex phenomenon of oil-fuel droplet induced pre-ignition has been decomposed to its elementary processes. This approach helps identify the key fluid properties and engine parameters that affect the pre-ignition phenomenon, and could be used to control LSPI. Based on the conceptual model, a 3D CFD engine simulation has been developed which is able to realistically model all of the elementary processes involved in droplet induced pre-ignition. The simulation was successfully able to predict droplet induced pre-ignition at conditions where the phenomenon has been experimentally observed.
The simulation has been able to help explain the observation of pre-ignition advancement relative to injection timing as experimentally observed in a previous study [6]. The results indicate that retarded injection timing leads to shorter time for mixing and subsequently relatively higher inhomogeneity and local equivalence ratios which leads to shorter ignition delay. This implies that beyond temperature and pressure, vaporization and mixing of the components of the fluid ejected from the piston crevice also affects pre-ignition.
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Gupta, A., Shao, H., Remias, J., Roos, J. et al., "Relative Impact of Chemical and Physical Properties of the Oil-Fuel Droplet on Pre-Ignition and Super-Knock in Turbocharged Gasoline Engines," SAE Technical Paper 2016-01-2278, 2016, https://doi.org/10.4271/2016-01-2278.Also In
References
- Vangraefschepe, F., and Zaccardi J. M.. "Analysis of destructive abnormal combustions appearing at high load and low engine speed on high performance gasoline engines." In The Spark Ignition Engine of the Future, SIA Congress. 2007.
- Amann, M. and Alger, T., "Lubricant Reactivity Effects on Gasoline Spark Ignition Engine Knock," SAE Int. J. Fuels Lubr. 5(2):760-771, 2012, doi:10.4271/2012-01-1140.
- Zahdeh, A., Rothenberger, P., Nguyen, W., Anbarasu, M. et al., "Fundamental Approach to Investigate Pre-Ignition in Boosted SI Engines," SAE Int. J. Engines 4(1):246-273, 2011, doi:10.4271/2011-01-0340.
- Peters, N., Kerschgens, B., and Paczko, G., "Super-Knock Prediction Using a Refined Theory of Turbulence," SAE Int. J. Engines 6(2):953-967, 2013, doi:10.4271/2013-01-1109.
- Amann, M., Alger, T., and Mehta, D., "The Effect of EGR on Low-Speed Pre-Ignition in Boosted SI Engines," SAE Int. J. Engines 4(1):235-245, 2011, doi:10.4271/2011-01-0339.
- Qi, Y., Xu, Y., Wang, Z., and Wang, J., "The Effect of Oil Intrusion on Super Knock in Gasoline Engine," SAE Technical Paper 2014-01-1224, 2014, doi:10.4271/2014-01-1224.
- Long, Y., Wang Z., Qi Y., Xiang S. et al., "Effect of Oil and Gasoline Properties on Pre-Ignition and Super-Knock in a Thermal Research Engine (TRE) and an Optical Rapid Compression Machine (RCM)," SAE Technical Paper 2016-01-0720, 2016, doi:10.4271/2016-01-0720.
- Takeuchi, K., Fujimoto, K., Hirano, S., and Yamashita, M., "Investigation of Engine Oil Effect on Abnormal Combustion in Turbocharged Direct Injection - Spark Ignition Engines," SAE Int. J. Fuels Lubr. 5(3):1017-1024, 2012, doi:10.4271/2012-01-1615.
- Wang, Z., Qi, Y., Liu, H., Long, Y. et al., "Experimental Study on Pre-Ignition and Super-Knock in Gasoline Engine Combustion with Carbon Particle at Elevated Temperatures and Pressures," SAE Technical Paper 2015-01-0752, 2015, doi:10.4271/2015-01-0752.
- Okada, Y., Miyashita, S., Izumi, Y., and Hayakawa, Y., "Study of Low-Speed Pre-Ignition in Boosted Spark Ignition Engine," SAE Int. J. Engines 7(2):584-594, 2014, doi:10.4271/2014-01-1218.
- CONVERGENT SCIENCE., Inc. CONVERGE, CFD Software, (Version 2.3) Convergent Science, Inc. Middleton, WI, USA, 2015
- Senecal, P., Pomraning, E., Richards, K., Briggs, T. et al., "Multi-Dimensional Modeling of Direct-Injection Diesel Spray Liquid Length and Flame Lift-off Length using CFD and Parallel Detailed Chemistry," SAE Technical Paper 2003-01-1043, 2003, doi:10.4271/2003-01-1043.
- Liu, Yao-Dong, Jia Ming, Xie Mao-Zhao, and Pang Bin. "Enhancement on a skeletal kinetic model for primary reference fuel oxidation by using a semidecoupling methodology." Energy & Fuels 26, no. 12 (2012): 7069-7083.
- Kawanabe, H. and Ishiyama, T., "A Study on a Reduced Kinetic Model for n-Cetane and Heptamethylnonane Based on a PRF Reduced Kinetic Model," SAE Technical Paper 2012-01-1576, 2012, doi:10.4271/2012-01-1576.
- Westbrook, Charles K., Pitz William J., Herbinet Olivier, Curran Henry J., and Silke Emma J.. "A comprehensive detailed chemical kinetic reaction mechanism for combustion of n-alkane hydrocarbons from n-octane to n-hexadecane." Combustion and Flame 156, no. 1 (2009): 181-199.
- Wang, Zhi, Liu Hui, Song Tao, Qi Yunliang, He Xin, Shuai Shijin, and Wang JianXin. "Relationship between super-knock and pre-ignition." International Journal of Engine Research 16, no. 2 (2015): 166-180.