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Effect of Lube Oil Film Thickness on Spray/Wall Impingement with Diesel, M20 and E20 Fuels
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Spray impacting on a lube oil film with a finite thickness is a common phenomenon in IC engines and plays a critical role in the fuel-air mixture process and combustion. With the use of early injection strategy to achieve HCCI combustion mode in diesel engines, this phenomenon becomes more and more prominent. In addition, oxygenated fuels such as methanol and ethanol are regarded as alternative fuel and additives to improve the overall performance of HCCI engine. Therefore, a better understanding about the role of lube oil film thickness in methanol-diesel and ethanol-diesel blended fuels spray/wall impingement is helpful for accumulating experimental data to establish a more accurate spray/wall impingement model and optimize the combustion in HCCI engines. In this paper, the effect of lube oil film thickness on the characteristics of spray/wall impingement of different fuels are investigated in a constant volume bomb test system. Fuels include diesel, methanol (20v%)-diesel (80v%) blended fuels(M20),ethanol(20v%)-diesel(80v%) blended fuels(E20). With the novel measurement methods, the information about film thickness and adhered fuel ratio was obtained. In general, the results demonstrate that the initial lube oil film influence the wall film distribution after impingement. With the increase of initial lube oil film thickness, the diffusion and merge interaction between spray droplets and oil film become obvious which intensify the phenomenon of the dilution of oil film. But due to the low-density and high-volatile property of M20 and E20 fuels compared to diesel, the level of diffusion and merge interaction between alcohol-diesel blended fuels spray and lube oil film is lower than that of diesel which means using alcohol-diesel blended fuels can mitigate the problem of lube oil dilution and local rich mixture during spray/wall impingement process.
CitationGe, M., Liang, X., Yu, H., Wang, Y. et al., "Effect of Lube Oil Film Thickness on Spray/Wall Impingement with Diesel, M20 and E20 Fuels," SAE Technical Paper 2017-01-0847, 2017, https://doi.org/10.4271/2017-01-0847.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
- Yao, M., Zheng Z., and Liu H., Progress and recent trends in homogeneous charge compression ignition (HCCI) engines. Progress in Energy and Combustion Science, 2009. 35(5): p. 398-437,doi:10.1016/j.pecs.2009.05.001
- Naber, J. and Reitz, R., "Modeling Engine Spray/Wall Impingement," SAE Technical Paper 880107, 1988, doi:10.4271/880107.
- Watkins A.P., Wang D.M., A new model for diesel spray impaction on walls and comparison with experiment//COMODIA 90 Proceedings of International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engines, 1990: 243-248.
- Park, K. and Watkins A.P., Comparison of wall spray impaction models with experimental data on drop velocities and sizes. International Journal of Heat and Fluid Flow, 1996. 17(4): p. 424-438, doi:10.1016/0142-727X(96)00049-5
- Mundo, C., Sommerfeld M., and Tropea C., Experimental studies of the deposition and splashing of small liquid droplets impinging on a flat surface. 1994.
- Bai, C.X., Rusche H., and Gosman A.D., Modeling of gasoline spray impingement. Atomization & Sprays, 2002. 12(1-3): p. 1-28, doi: 10.1615/AtomizSpr.v12.i123.10
- Lee, S.H. and Hong S.R., Development of a new spray/wall interaction model. International Journal of Multiphase Flow, 2000. 26(7): p. 1209-1234, doi: 10.1016/S0301-9322(99)00080-4
- Kalantari, D. and Tropea C., Spray impact onto flat and rigid walls: Empirical characterization and modelling. International Journal of Multiphase Flow, 2007. 33(5): p. 525-544, doi: 10.1016/j.ijmultiphaseflow.2006.09.008
- Saito, A.; Kawamura, K.; Watanabe, S.; Takahashi, T.; Tuzuki, N. Analysis of impinging spray characteristics under high-pressure fuel injection (1st report, measurements of impinging spray characteristics). Trans. Jpn. Soc. Mech. Eng. Part B 1993, 59, 3290-3295.
- Akop, M.Z.; Zama, Y.; Furuhata, T.; Arai, M. Characteristics of adhesion of diesel fuel on impingement disk wall. Part 1: Effect of Impingement area and inclination angle of disk. At. Sprays 2013, 23, 725-744, doi: 10.1615/AtomizSpr.2013008113
- Akop, M.Z.; Zama, Y.; Furuhata, T.; Arai, M. Characteristics of adhesion of diesel fuel on impingement disk wall. Part 2: Droplet Weber number and adhered fuel mass. At. Sprays 2014, 24, 651-671, doi: 10.1615/AtomizSpr.2014008445
- Brown, D.R., A study of the behaviour of a thin sheet of moving liquid. Journal of Fluid Mechanics, 1961. 10(2): p. 297-305,doi:10.1017/S002211206100024X
- Wang A. B., Chen C. C., and Hwang W. C., ‘‘Very thin plane film generator and visualization of droplet impinging on the film’’ (in Chinese), Proceedings of the 16th National Conference of Mechanical Engineering, Hsin-Chu, Taiwan, 3-4 December 1999 (unpublished), p. 190.
- Wang AB, Chen CC. Splashing impact of a single drop onto very thin liquid films. Physics of Fluids, 2000.12(12):2155-8, doi:10.1063/1.1287511
- Yu, H., et al., Experimental investigation on wall film ratio of diesel, butanol/diesel, DME/diesel and gasoline/diesel blended fuels during the spray wall impingement process. Fuel Processing Technology, 2017. 156: p. 9-18,doi: 10.1016/j.fuproc.2016.09.029
- Yu, H., et al., Experimental investigation on spray-wall impingement characteristics of n-butanol/diesel blended fuels. Fuel, 2016. 182: p. 248-258,doi: 10.1016/j.fuel.2016.05.115
- Infralytic GmbH. Oil-Thickness Sensor NG Operating Manual; Version 1.6.3; Infralytic GmbH:Marburg, Germany, 2011.
- Yu, H., et al., Experimental Investigation on Wall Film Distribution of Dimethyl Ether/Diesel Blended Fuels Formed during Spray Wall Impingement. Energies, 2016. 9(11),doi:10.3390/en9110949