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Effects of ratio and dwell of split injection on fuel spray and mixture formation process under evaporating, non-reacting condition
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 19, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The effects of split injections of a diesel spray was evaluated in a constant volume chamber under evaporating, non-reacting condition. Laser absorption scattering (LAS) technique was utilized for the mixture concentration measurement, using a diesel surrogate fuel consists of n-tridecane and 2.5% of 1-methylnaphthalene in volume basis. While fixing the total injected fuel mass of 5.0 mg/hole, the effects of split ratio in mass basis and the dwell time (or injection interval) were investigated. Among the split ratios conducted in the current study (3,7, 5:5 and 7:3), the split ratio of 7:3 was the optimum for lean mixture formation regarding the overall distribution of the equivalence ratio at end-of-injection (EOI) timing. The air entrainment wave at the EOI timing of the first injection allowed the fuel at the vicinity of the nozzle to become leaner at a faster rate. It was thought that, the split ratio of 7:3 provided an adequate amount of fuel quantity and vapor penetration to fit into the fuel-lean region formed from the first injection. The increase of the dwell time provided longer time for leaner mixture formation of the first injection, but the improvement was small. Therefore, the shortest dwell of 120 μs was reasonable for lean mixture formation of the second spray. It showed similar equivalence ratio distribution compared to any other longer dwell time conditions under the absence of combustion.
CitationKim, J., Kakami, S., Nishida, K., and Ogata, Y., "Effects of ratio and dwell of split injection on fuel spray and mixture formation process under evaporating, non-reacting condition," SAE Technical Paper 2019-01-2323, 2019, https://doi.org/10.4271/2019-01-2323.
Data Sets - Support Documents
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- Busch, S., Zha, K., Miles, P.C., “Investigations of closely coupled pilot and main injections as a means to reduce combustion noise in a small bore direct injection Diesel engine”, Int J Engine Res 16(1):13-22, 2015
- Busch, S., Zha, K., Miles, P.C., “Investigations of closely coupled pilot and main injections as a means to reduce combustion noise”, in Thermo and fluid dynamics processes in direct injection engines, THIESEL, Sep 9th-12th, 2014.
- Yang, K., Nishida, K., Ogata, Y., Yamakawa, H., “Characteristics of fuel evaporation, mixture formation and combustion of 2D cavity impinging spray under high-pressure split injection”, Fuel 234:746-756, 2018
- Maier, R., Warga, J., Pauer, T., Gerhardt, J., Krüger, M., “The Next Generation BOSCH Common Rail Injectors with Digital Rate Shaping - A Key Factor for Meeting Future Requirements”, in Internationales Wiener Motorensymposium 2012
- Wang, Z., Xu, H., Jiang, C., Wyszynski, M.L., “Experimental study on microscopic and macroscopic characteristics of diesel spray with split injection”, Fuel 174 (2016)140-152
- Cung, K., Moiz, A., Johnson, J., Lee, S.Y., Kweon, C.B., Montanaro, A., “Spray-combustion interaction mechanism of multiple-injection under diesel engine conditions”, Proc Combust Ins 35:3061-3068, 2015.
- Skeen, S., Manin, J., Pickett, L.M., “Visualization of ignition processes in high-pressure sprays with multiple injections of n-Dodecane”, SAE Int. J. Engines, Vol. 8(2):696-715, 2015
- Skeen, S., Manin, J., Pickett, L.M., “Simultaneous formaldehyde PLIF and high-speed schlieren imaging for ignition visualization in high-pressure spray flames”, Proc Combust Ins 35:3167-3174, 2015
- Dec, JE., “Advanced compression-ignition engines-understanding the in-cylinder processes”, Proc Combust Ins 32:2727-2742, 2009.
- Yin, L., Lundgren, M., Wang, Z., Stamatoglou, P., Richter, M., Andersson, O., Tunestal, P., “High efficient internal combustion engine using partially premixed combustion with multiple injections”, Appl Energy 233-234:516-523, 2019
- Kim, J., Kong, L., Nishida, K., Ogata, Y. et al., “Comparison of Fuel Concentration Distribution Of Diesel Spray Between Single- And Multi-hole Injectors Under Evaporating, Non-reacting Condition”, in ICLASS 2018, 14th Triennial International Conference on Liquid Atomization and Spray Systems, Chicago, IL, USA, July 22-26, 2018
- Zhang, Y., Ito, T. and Nishida, K., “Characterization of Mixture Formation in Split-Injection Diesel Sprays via Laser AbsorptionScattering (LAS) Technique”, SAE Technical Paper 2001-01-3498, 2001
- Zhang, Y., Nishida, K., Yoshizaki, T., “Quantitative measurement of droplets and vapor concentration distributions in diesel sprays by processing UV and visible images”, SAE Technical Paper 2001-01-1294, 2001
- Matsuo, T., Li, K., Itamochi, M., Nishida, K. et al., “Tracer LAS technique for quantitative mixture concentration measurement of evaporating diesel spray”, in ILASS Asia 2014, 17th Annual conference on liquid atomization and spray systems - Asia, Shanghai, China.
- Kamimoto, T., Yokota, H., and Kobayashi, H., “A new technique for the measurement of sauter mean diameter of droplets in unsteady dense sprays”, SAE Technical Paper 890316, 1989.
- Pickett, L., Manin, J., Genzale, C., Siebers, D. et al., “Relationship Between Diesel Fuel Spray Vapor Penetration/Dispersion and Local Fuel Mixture Fraction”, SAE Int. J. Engines 4(1):764-799, 2011
- Siebers, D.L., “Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization”, SAE Technical Paper 1999-01-0528
- Naber, J.D., Siebers, D.L., “Effects of gas density and vaporization on penetration and dispersion of diesel sprays”, SAE Technical Paper 960034, 1996
- Musculus, M. and Kattke, K., “Entrainment Waves in Diesel Jets”, SAE Int. J. Engines 2(1):1170-1193, 2009
- Kook, S., Pickett, L., and Musculus, M., "Influence of Diesel Injection Parameters on End-of-Injection Liquid Length Recession," SAE Int. J. Engines 2(1):1194-1210, 2009
- Bin Abdullah, M.F.E., Toyama, Y., Takahara, K., Saruwatari, S. et al., “Optical Diagnostics of Inversed-Delta Rate Shaping Diesel Spray Flame towards Reduction of Late Combustion,” SAE Technical Paper 2018-01-1793, 2018, doi:10.4271/2018-01-1793
- Bruneaux, G., “Mixing process in high pressure diesel jets by normalized laser induced exciplex fluorescence, Part I: free jet”, SAE Technical Paper 2005-01-2100, 2005.
- Bruneaux, G., “Mixing Process in High Pressure Diesel Jets by Normalized Laser Induced Exciplex Fluorescence Part II: W all Impinging Versus Free Jet”, SAE Technical Paper 2005-01-2097, 2005
- Siebers, D.L. and Higgins, B.S., “Flame lift-off on direct-injection diesel sprays under quiescent conditions,” SAE Technical Paper 2001-01-0530, 2001.
- Lachaux, T., Musculus, M.P.B., “In-cylinder unburned hydrocarbon visualization during low-temperature compression-ignition engine combustion using formaldehyde PLIF”, Proc Combust Ins 31:2921-2929, 2007.
- Heywood, J.B., “Internal combustion engines fundamental” McGrawHill