TY - GEN
T1 - Modeling of urea-water solution injection spray in SCR system
AU - Nayak, Nagaraj S.
AU - Kapilan, N.
AU - Sadashiva Prabhu, S.
PY - 2012/12/31
Y1 - 2012/12/31
N2 - To control the emissions from the diesel engines of modern automobiles, it requires the development of adequate and advanced exhaust gas aftertreatment devices. Selective Catalytic Reduction (SCR) is a method that can be used in mobile diesel engine aftertreatment systems to reduce harmful NOx emissions. Due to the toxicity and handling problems of ammonia, currently injection of a liquid Urea-Water Solution (UWS) into the exhaust stream approach is used. The water evaporates and the urea undergoes thermal decomposition producing ammonia that reacts with the NOx in the exhaust gas inside a SCR catalyst to produce nitrogen and water vapor. This work presents the study of UWS injection spray using commercial available CFD code, Fire v8.3. The evaporation of water from a single droplet of UWS is investigated theoretically and droplets are treated with Lagrangian particle tracking. Simulation study at different exhaust gas temperatures and injector locations is carried out and compared with experimental values. Thus, the present study results predict the local distribution and the conversion of the reducing agent.
AB - To control the emissions from the diesel engines of modern automobiles, it requires the development of adequate and advanced exhaust gas aftertreatment devices. Selective Catalytic Reduction (SCR) is a method that can be used in mobile diesel engine aftertreatment systems to reduce harmful NOx emissions. Due to the toxicity and handling problems of ammonia, currently injection of a liquid Urea-Water Solution (UWS) into the exhaust stream approach is used. The water evaporates and the urea undergoes thermal decomposition producing ammonia that reacts with the NOx in the exhaust gas inside a SCR catalyst to produce nitrogen and water vapor. This work presents the study of UWS injection spray using commercial available CFD code, Fire v8.3. The evaporation of water from a single droplet of UWS is investigated theoretically and droplets are treated with Lagrangian particle tracking. Simulation study at different exhaust gas temperatures and injector locations is carried out and compared with experimental values. Thus, the present study results predict the local distribution and the conversion of the reducing agent.
UR - http://www.scopus.com/inward/record.url?scp=84871579214&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871579214&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.232.583
DO - 10.4028/www.scientific.net/AMM.232.583
M3 - Conference contribution
AN - SCOPUS:84871579214
SN - 9783037855140
T3 - Applied Mechanics and Materials
SP - 583
EP - 587
BT - Mechanical and Aerospace Engineering
T2 - 2012 3rd International Conference on Mechanical and Aerospace Engineering, ICMAE 2012
Y2 - 7 July 2012 through 8 July 2012
ER -