Browse > Article
http://dx.doi.org/10.3795/KSME-B.2010.34.11.999

The Spray Characteristics and Spray Behavior Characteristic in Exhaust Gas Flow of Urea Solution Injector  

Oh, Jung-Mo (Dept. of Mechanical Engineering, Hanyang Univ.)
Han, Young-Deok (Dept. of Mechanical Engineering, Hanyang Univ.)
Kim, Ki-Bum (Dept. of Mechanical Engineering, Hanyang Univ.)
Lee, Ki-Hyung (Dept. of Mechanical Engineering, Hanyang Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.11, 2010 , pp. 999-1004 More about this Journal
Abstract
Recently, many technologies have been developed in order to satisfy stringent emission regulations. However, in the case of diesel engines, the stringent emission regulations with respect to NOx and PM have not yet been satisfied. A dramatic reduction in the NOx and PM emissions could be achieved by using after-treatment systems such as lean NOx trap (LNT) and urea-SCR systems. However, the high temperature in the exhaust pipe affects the spray behavior of the secondary injector, which is used for supplying the Urea-SCR. Because of this high temperature, it is difficult to achieve uniform distribution of the reducing agent in the manifold. In this paper, the characteristics of a urea-SCR injector used for injecting in the exhaust pipe are presented. The purpose of this study was to investigate the spray characteristics of the injector, such as the spray angle, injection quantity, and SMD. In addition, laser diagnostics and high-speed-camera images were used to analyze the injector spray characteristics and to present a distribution of reduction in the transparent manifold.
Keywords
Urea Solution; Diesel Engine; Sauter Mean Diameter(SMD); After-Treatment; Root Mean Square Image(RMS Image);
Citations & Related Records

Times Cited By SCOPUS : 0
연도 인용수 순위
  • Reference
1 Choi, J. H., Choi, Y. S., Cho, I. E. and Lee, S. W., 2007, "A Study on the Distribution of Injected Urea into Exhaust Pipe in the SCR System," KSAE 2007.
2 Oh, J. M., Lee, K. H. and Lee, J. H., 2008, “A Study on the Optimal Injection Conditions for an HC-LNT Catalyst System with a 12-Hole Type Injector," Journal of Thermal Science and Technology, Vol. 3, No. 2, pp. 278-291.   DOI
3 Jeong, H. Y., Lee, K. H. and Ikeda, Y., 2007, "Investigation of the Spray Characteristics for a Secondary Fuel Injection Nozzle Using a Digital Image Processing Method," Meas. Sci. Technol., Vol. 18, pp. 1591-1602.   DOI   ScienceOn
4 Oh, J. M., Lee, K. H. and Jeong, H. Y., 2008, "Study on the Spray Behavior and Diesel Fuel Distribution Characteristics of a Secondary Injector for a Lean NOx Trap Catalyst," Energy & Fuels, Vol. 22, pp. 1527-1534.   DOI   ScienceOn
5 Heywood, J. B., 1988, "Internal Combustion Engine Fundamentals," McGraw Hill.
6 Eastwood, P., 2000, "Critical Topics in Exhaust Gas After-Treatment," Research studies press Ltd.,.
7 Oh, J. T., Seo, J. W., Lee, K. I., Park, J. I., Choi, Y. H. and Lee, J. H., 2007, “Visualization of Urea Mixing Characteristics by Mixer and Diffuser in SCR system,” KSAE 2007.