A transient three-dimensional model has been developed to simulate the thermal and conversion characteristics of nonadiabatic monolithic converters operating under flow maldistribution conditions. The model accounts for convective heat and mass transport, gas-solid heat and mass transfer, axial and radial heat conduction, chemical reactions and the attendant heat release, and heat loss to the surroundings.The model was used to analyze the transient response of an axisymmetric ceramic monolith system (catalyzed monolith, mat, and steel shell) during converter warm-up, sustained heavy load, and engine misfiring. The simulation indicates that high solid temperatures are encountered during sustained heavy load or engine misfiring, while steep temperature gradients are developed during the converter warm-up period. Flow maldistribution and radial heat loss are major sources for the thermal gradients. The predicted temperature profiles provide a basis for the analysis of thermal stresses and fatigue in the monolith converter assembly.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A Three-Dimensional Model for the Analysis of Transient Thermal and Conversion Characteristics of Monolithic Catalytic Converters


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1988



    Publication date :

    1988-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Numerical Analysis of Transient Thermal and Conversion Characteristics of Multisection Catalytic Converters

    Swiatek, Antoni / Nowakowski, Jacek / Brzozowski, Krzysztof | SAE Technical Papers | 2001


    Numerical Analysis of Transient Thermal and Conversion Characteristics of Multisection Catalytic Converters

    Swiatek, A. / Brzozowski, K. / Nowakowski, J. et al. | British Library Conference Proceedings | 2001


    Analysis of Transient Thermal and Conversion Characteristics of Catalytic Converters during Warm-up

    Baba, N. / Ohsawa, K. / Sugiura, S. | British Library Online Contents | 1996