In practical applications of ammonia SCR aftertreatment systems using urea as the reductant storage compound, one major difficulty is the often constrained packaging envelope. As a consequence, complete mixing of the urea solution into the exhaust gas stream as well as uniform flow and reductant distribution profiles across the catalyst inlet face are difficult to achieve.This paper discusses a modeling approach, where a combination of 3D CFD and a lumped parameter SCR model enables the prediction of system performance, even with non-uniform exhaust flow and ammonia distribution profiles. From the urea injection nozzle to SCR catalyst exit, each step in the modeling process is described and validated individually. Finally the modeling approach was applied to a design study where the performance of a range of urea-exhaust gas mixing sections was evaluated.The application to the design study shows that this combination of tools, CFD and lumped parameter SCR model, gives accurate predictions of the effects of design changes to the actual hardware on the overall performance.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Combined 3D/Lumped Modeling Approach to Ammonia SCR After-treatment Systems: Application to Mixer Designs


    Additional title:

    Sae Technical Papers



    Conference:

    SAE 2006 World Congress & Exhibition ; 2006



    Publication date :

    2006-04-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A combined 3D/lumped modelling approach to ammonia SCR after-tratment systems: application to mixer designs

    Karlsson,M. / Wallin,U. / Fredholm,S. et al. | Automotive engineering | 2006


    Experimental Investigation of Novel Ammonia Mixer Designs for SCR Systems

    Schiffmann, Philipp / Lecompte, Matthieu / Laget, Olivier | British Library Conference Proceedings | 2018


    Experimental Investigation of Novel Ammonia Mixer Designs for SCR Systems

    Lecompte, Matthieu / Laget, Olivier / Schiffmann, Philipp | SAE Technical Papers | 2018


    Forced mixer lobes in ejector designs

    Presz, Walter M., Jr. / Morin, Bruce L. / Gousy, Robert G. | NTRS | 1988


    SEVERAL DESIGNS OF MICROFLUIDIC CHANNEL MIXER

    Wang, Y.Y. / Heo, H.S. / Kang, S. et al. | British Library Conference Proceedings | 2007