<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The kinetic mechanism of chemical reaction was used to calculate the coupling of the fluid kinetics with the urea decomposition reaction and the SCR reaction kinetics. Combined with the engine test and simulation, the distribution uniformity of the urea injection and ammonia gas was studied. Through numerical simulation on urea spray and exhaust flow in Urea-SCR system, the flow field characteristics in whole after-treatment system are gotten. By using numerical calculation in different urea injection angle and orifice sizes, the urea-crystallization and ammonia distribution have been studied and the optimal urea spray angle and nozzle size are given.</p></abstract>

The kinetic mechanism of chemical reaction was used to calculate the coupling of the fluid kinetics with the urea decomposition reaction and the SCR reaction kinetics. Combined with the engine test and simulation, the distribution uniformity of the urea injection and ammonia gas was studied. Through numerical simulation on urea spray and exhaust flow in Urea-SCR system, the flow field characteristics in whole after-treatment system are gotten. By using numerical calculation in different urea injection angle and orifice sizes, the urea-crystallization and ammonia distribution have been studied and the optimal urea spray angle and nozzle size are given.

Urea Injection and Uniformity of Ammonia Distribution in SCR System of Diesel Engine

Department of Mechanical and Electrical Engineering

School of Energy and Environmental Engineering

Applied Mathematics and Nonlinear Sciences

This work is licensed under the Creative Commons Attribution 4.0 International License.

The kinetic mechanism of chemical reaction was used to calculate the coupling of the fluid kinetics with the urea decomposition reaction and the SCR reaction...

Urea Injection and Uniformity of Ammonia Distribution in SCR System of Diesel Engine

Published Online: May 08, 2020

Page range: 129 - 142

Received: Dec 27, 2019

Accepted: Feb 01, 2020

DOI: https://doi.org/10.2478/amns.2020.2.00004

Keywords
Urea-SCR system, spray parameter, ammonia concentration distribution, uniformity

© 2020 Yunjing Jiao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Urea Injection and Uniformity of Ammonia Distribution in SCR System of Diesel Engine

Published Online: May 08, 2020

Page range: 129 - 142

Received: Dec 27, 2019

Accepted: Feb 01, 2020

DOI: https://doi.org/10.2478/amns.2020.2.00004

KeywordsUrea-SCR system, spray parameter, ammonia concentration distribution, uniformity

© 2020 Yunjing Jiao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Urea-SCR system, spray parameter, ammonia concentration distribution, uniformity