The Open Mechanical Engineering Journal

2014, 8 : 643-647
Published online 2014 December 31. DOI: 10.2174/1874155X01408010643
Publisher ID: TOMEJ-8-643

Numerical Simulation to Reduce NO of Diesel Engine Urea-SCR System

Zhang Hui , Xu Boyan and Wang Chuansheng
School of Mechanical Engineering, Qingdao University of Science and Technology, Singling Road, Qingdao, 266042, China.

ABSTRACT

By using computational fluid dynamics and chemical reaction dynamics method, the mathematical model of SCR (selective catalytic reduction) system was established. On the basis of the verified feasibility, by CFD numerical analytical method, the reducing agent inside the catalysts concentration distribution was compared under different added urea schemes. Jet direction and the form of fuel injector were studied on the basis of the effects of reducing agent concentration distribution. The simulation result shows good agreement with the experimental data. The simulated results can be utilized in optimization design of the diesel SCR catalyst.

Keywords:

NO, numerical simulation, Urea-SCR, Grid Model, AVL exhaust gas analyzer, SCR catalyst.