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http://dx.doi.org/10.5916/jkosme.2013.37.5.510

Effect of injection pressure on the atomization characteristics of a liquid sheet-type swirl injector for Urea-SCR system  

Kim, Duckjin (Korea Automotive Technology Institute)
Yang, Donguk (Jeonbuk Institute of Automotive Technology)
Lee, Jeekeun (Division of Mechanical System Engineering, College of Engineering, Chonbuk National University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.37, no.5, 2013 , pp. 510-519 More about this Journal
Abstract
In this study, the spray characteristics of a pressure swirl atomizer classified into a liquid sheet-type swirl nozzle for Urea-SCR system were investigated experimentally with the variation of injection pressure. The length to diameter ratio ($l_o/d$) of the nozzle was 3.1, and the swirler was set inside the nozzle tip to give injecting fluid angular momentum. The injection duration of the nozzle was controlled by PWM (pulse width modulation) modes. The development processes of the spray were imaged by a 2-D PIV system, and the change of spray angle was measured. The atomization characteristics, including axial velocity and SMD, were measured using a 2-D PDA system with the injection pressures at room temperature and ambient pressure conditions. As the experimental results, the injection pressure had a significant impact on the spray structure showing a different shape around the spray leading edge, and the smaller SMD was observed with increasing injection pressures, which was similar to that of the previous work.
Keywords
Pressure-swirl injector; Spray; Atomization; PDPA (Phase Doppler Particle Analyzer); SMD (Suter mean diameter);
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Times Cited By KSCI : 1  (Citation Analysis)
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1 J. K. Lee, K. Nishida, B. J. Rho, Y. K. Lee, and E. S. Kim, "Breakup process of initial spray of D.I. gasoline injector by LIF imaging technique," 13th International Symposium on Applications of Laser Techniques to Fluid Mechanics, 2006.
2 H. Lefebvre, Atomization and Sprays, New York: Hemisphere Publishing Corporation, pp. 215-217, 1989.
3 S. Y. Lee, Atomization of the Liquid, Seoul: Minumsa Co., pp. 194-196. 1996.
4 S. M. Kang, J. K. Lee, and B. J. Rho, "Effect of assist air flowrate on the atomization characteristics in a dual air supplying twin-fluid swirl nozzle," Proceedings of Fall Conference of The Korean Society of Mechanical Engineers, pp. 11-16, 2007.
5 D. W. Yang, J. K. Kim, K. N. Kim, D. J. Kim, and J. K. Lee, "Breakup characteristics of liquid sheet type swirl injector using LIF technique," Proceedings of Fall Conference of The Korean Society of Mechanical Engineers, pp. 2930-2936, 2010.
6 Y. Y. Ham, S. W. Kim, and H. S. Jang, "A study on the effect of the air-assist injection nozzle configurations on DeNOx characteristics in Urea-SCR system," Transaction of The Korean Society of Automotive Engineers, vol. 17, no. 6, pp. 67-63, 2009.
7 Y. Nakayama, "Action of the fluid in the air micrometer: first report, characteristics of small diameter nozzle and orifice," Bull. Japan Society of Mechanical Engineers, vol. 4, pp. 516-524, 1961.   DOI
8 K. D. Kim, W. H. Youn, B. S. Kim, J. S. Ha, K. H, Ahn, and J. T. Kim, "Performance simulation for the variation of fuel injection nozzle configurations in medium speed diesel engine," Journal of the Korean Society of Marine Engineering, vol. 30, no 6, pp. 662-668, 2006 (in Korean).
9 B. J. Rho, S. J. Kang, and J. H. Oh, "Swirl effect on the spray characteristics of a twin-fluid jet," The Korean Society of Mechanical Engineers International Journal, vol. 12, no. 5, pp. 899-906, 1998.
10 S. Y. Lee, Atomization of the Liquid, Minumsa Co., pp. 166-167. 1996.
11 S. M. Jeng, M. A. Jog, and M. A. Benjamin, "Computational and experimental study of liquid sheet emanating from simplex fuel nozzle," The American Institute of Aeronautics and Astronautics Joumal, vol. 36, no. 2, 1998.
12 J. K. Lee, K. Nishida, and M. Yamakawa, "An analysis of ambient air entrainment into split injection D.I. gasoline spary by LIF-PIV technique," Society of Automotive Engineers Technical Paper, 2002-01-2662, 2002.
13 K. Narayanaswamy and Y. He, "Modeling of copper-zeolite and iron-zeolite selective catalytic reduction (SCR) catalysts at steady state and transient conditions," Society of Automotive Engineers Technical Paper 2008-01-0615, 2008.
14 J. Thompson, J. O. De Beeck, E. Joubert, and T. Wilhelm, "Case studies of urea SCR integration on passenger cars monitoring of urea inside the tank during hot and cold environment test missions," Society of Automotive Engineers Technical Paper 2008-01-1181, 2008.
15 H. Weltens, H. Bressler, F. Terres, H. Neumaier, and D. Rammoser, "Optimization of catalytic converter gas flow distribution by CFD prediction," Society of Automotive Engineers Technical paper 930780, 1993.
16 S. J. Jeong, S. J. Lee, W. S. Kim, and C. B, Lee, "Simulation on the optimum shape and location of urea injector for Urea-SCR system of heavy-duty diesel engine to prevent $NH_{3}$ slip," Society of Automotive Engineers Technical Paper, 2005-01-3886, 2005.
17 Å. Johansson, U. Wallin, M. Karlsson, A. Isaksson, and P. Bush, "Investigation on uniformity indices used for diesel exhaust aftertreatment systems," Society of Automotive Engineers Technical Paper 2008-01-0613, 2008.
18 T. Kowatari, Y. Hamada, and K. Amou, "A study of a new aftertreatment system(1): A new dosing device for enhancing low temperature performance of Urea-SCR," Society of Automotive Engineers Technical Paper, 2006-01-0642, 2006.
19 A. Nishioka, Y. Sukegawa, K. Katogi, H. Mamada, and T. Kowatari, "A study of a new aftertreatment system(2): control of urea solution spray for Urea-SCR," Society of Automotive Engineers Technical Paper, 2006-01-0644, 2006.
20 Z. Huang, Z. Zhu, Z. Liu, and Q. Liu, "Formation and reaction of ammonium sulfate salts on V2O5/AC catalyst during selective catalytic reduction of nitric oxide by ammonia at low temperatures," Journal of Catalysis, vol. 214, pp. 213-219, 2003.   DOI   ScienceOn
21 J. Girard, R. Snow, G. Cavataio, and Christine Lambert, "The influence of ammonia to NOx ratio on SCR performance," Society of Automotive Engineers Technical Paper 2007-01-1581, 2007.
22 T. V. Johnson, "Diesel emission control in review," Society of Automotive Engineers 2007-01-0233, 2007.