Prediction of Spray Behavior Injected by Urea SCR Injector and the Reaction Products（Fourth Report）

- Experimental Analysis of Urea Concentration Distribution Under High Temperature Flow Condition -

Abstract

Urea SCR system is effective post treatment device of diesel engine to remove NOx in exhaust gas. The purpose of this study is constructing simulation model capable of predicting spray behavior and NH₃ concentration distribution. In order to achieve the purpose, it is necessary to clarify urea solution spray behavior injected by Urea SCR injector and concentration distribution of NH₃ generated by chemical reaction in experimental analysis. In this report, NH₃ and HNCO concentration distribution were measured by FTIR, and urea concentration distribution was calculated.