D265-12 diesel engine SCR system fluid simulation analysis

Abstract In this paper, a diesel engine after-treatment SCR (Selective Catalytic Reduction) system is investigated to improve NOx emission reduction. Through theoretical analysis and three-dimensional model building, fluid simulation analysis was carried out by using Fluent software. The results show that the system has good fluidity, the pressure drop is less than 10 Kpa, and the denitrification rate reaches 87%. However, there are still problems with eddy current and urea crystallization, which need to be further optimized. The study confirms the effectiveness of the SCR system and points out the direction of improvement.