CFD Analysis of Catalytic Convertor to Optimise the Back Pressure and Velocity

Design and analysis of a catalytic converter is presented in this paper. The catalytic converter is one of the most important elements that are used for the reduction of automobile exhaust emissions. But in the present work, it is observed that the catalytic converter increases exhaust back pressure. Due to this, volumetric efficiency will decrease and fuel consumption will increase. The main aim of this paper is to investigate the effect of back pressure and velocity by increasing and decreasing the diffusion angles. In this study, different geometries were analysed with variable diffusion angles. The numerical analysis shows that with an increase in the diffusion angle by 7°, the pressure drop is increased by 6.03% in the base model. On the other hand, when diffusion angle is decreased by 7°, then pressure drop is reduced by 9.72% in the base model. When the angle increased by 7°, the velocity increased by 25.04%, and when the angle decreased by 7°, the velocity decreased by 19.44%.