Authors : Namwook Kim, Munseok Choe and Dooseuk Choi
Abstract: The purpose of this study is to analyze the influence of mixer blade angle change in urea-SCR system on the system through post treatment technology that aims to reduce nitrogen oxide and optimize mixer shape. A model to analyze mixer and exhaust pipeline was made by using CATIA V5 to conduct flow analysis and then analysis was made by using ANSYS program. Water instead of urea was used for easy analysis. Variables in unit of 5° across a range from 0-45° were given in mixer blade angle from 1,000-4,000 rpm. Analysis showed that, the more mixer blade angle increased, the more uniform distribution of pressure and velocity was and the less back pressure at the front end in mixer was analysis of flow uniformity index showed that changed mixer blade angle lessened phenomena that flow uniformity index reduces in a section that swirl occurs compared to existing model and it increased gradually in a mixed section. It was ascertained that when changing mixer blade angle by 30, uniformity was high and back pressure was low which suggests that 30° model is the optimized level.
Namwook Kim, Munseok Choe and Dooseuk Choi, 2018. Analysis on Flow Characteristic According to the Shape Change of Mixer Blade in Urea-SCR System. Journal of Engineering and Applied Sciences, 13: 2845-2849.