Impact of the Spray-Wall-Interaction-Model on the Prediction of the Ammonia Homogenization in Automotive SCR Systems (Poster Presentation)

Authors

Dipl.-Phys. S. Fischer, Dipl.-Ing. H. Smith, Ass.Prof. Dr. T. Lauer, Univ.-Prof. Dr. B. Geringer, University of Technology, Vienna; Dipl.-HTL-Ing. G. Pessl, Dipl.-Ing.(FH) C. Krenn, BMW Motoren GmbH, Steyr

Year

2012

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 735

Summary

Nitrogen oxide emissions of diesel engine powered vehicles have to be significantly reduced in order to meet future international legislative restrictions. The Selective Catalytic Reduction (SCR) has meanwhile been established as a promising technology to cope with the challenging limits in the sector of mid-sized and large passenger cars. Despite its successful market launch, high optimization potentials remain for the automotive SCR system with respect to the fast preparation of the injected urea-water solution (UWS) and a sufficient ammonia homogenization at the SCR catalyst. In cooperation with BMW Motoren GmbH Steyr, the Institute for Powertrains and Automotive Technology from Vienna University of Technology implemented a CFD simulation model of the UWS preparation and mixing processes upstream of the SCR-catalyst.