Part of #Numerical Simulation Filter Section of Catalytic Converter in a Disel Engine# :
Publishing year : 2003
Conference : Eighth National Congress of Chemical Engineering of Iran
Number of pages : 11
Abstract: Spark ignition and diesel engines are a major source of urban air pollution. The major pollutants in the exhaust gases of SI engines are oxides of nitrogen (NOx), carbon monoxide (CO), and organic compounds that are unburned or partially burned in hydrocarbons (HC). In order to reduce exhaust emissions, most new cars have a catalytic converter located in the exhaust system, convert harmful pollutants into harmless gases.
The purpose of paper is to optimize the filter of catalytic converters. As we know the role of filter in uniform distribution of flow and particles and increase the surface of Reaction. In this paper, the porous media model is defined as a cell zone in which the porous media model is applied and the pressure loss in the flow is determined through our inputs as described in the momentum equation. To have a numerical simulation, a CFD Software base finite-volume method is used, and to the modeling turbulence of the RNG k-e turbulent model applied. This program, after the discretization of governing equations, is a body fitted coordinate system, which is produced in a preprocessor, integrates these equations into control volumes and
determines the rate of quantities on control volume faces using order two (upwind) approximations.