Modelling of flow distribution during catalytic converter light-off Online publication date: Mon, 10-May-2004
by Dimitrios N. Tsinoglou, Grigorios C. Koltsakis, Dimitrios K. Missirlis, Kyros J. Yakinthos
International Journal of Vehicle Design (IJVD), Vol. 34, No. 3, 2004
Abstract: The flow field non-uniformities at the inlet of catalytic converters are considered undesirable for their performance. Computational fluid dynamics (CFD) is a powerful tool for calculating the flow field inside the catalytic converter and optimising design concepts. However, the applicability of CFD for transient simulations is limited by the high CPU demands of this technique. The present study proposes an alternative computational method for the prediction of transient flow fields in axi-symmetric converters time-efficiently. The proposed flow resistance modelling (FRM) method is validated against the results of CFD predictions during a typical warm-up case. The FRM methodology is coupled with an already available transient model for heat transfer and chemical reactions in the catalyst. The effect of flow distribution on pollutant conversion and pressure drop is examined under warm-up and steady state operation.
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