NUMERICAL SIMULATION OF EFFECTS OF WALL THICKNESS AND CELL DENSITY ON THE THREE-WAY CATALYTIC CONVERTER PERFORMANCE

The transient symmetric mathematical model is established,and the effects of the wall thickness and cell density on the performance of a three-way catalytic converter are studied using numerical modeling.The conclusions show that the light-off time and the pressure drop through a converter are decreased,and the conversion efficiency during the warm-up period keeps almost invariant with reduction of the wall thickness of substrates,and that the pressure drop through a converter and a conversion efficiency during the warm-up state increases,and the light-off time almost keeps invariant when increasing cell density of substrates.Therefore,future catalytic converters should develop in the direction of thin wall thickness and high cell density substrates simultaneously.