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Computational analysis of catalyst light-off temperature in exhaust system of an IC engine

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Author: 
Vijaygouda M. Hiregoudar, Srivatsa S and Praveenkumar B. S.
Abstract: 

Catalytic converter of an engine becomes operational at a temperature of around 200 to 225˚C. During cold conditions engine components take more time to warm up, similarly the catalytic converter also takes more than usual time to reach light-off temperature, which means exhaust gases will escape untreated. In these situations the placement of the catalytic converter plays an important role, i.e. if it is placed too near to head of exhaust, time required to reach light-off temperature will be less and if it is too far, time taken will be large. In our work we have analyzed the exhaust gas flow and studied the variation of temperature with time and optimize the location of catalytic converter. We have used Pro-E Wild fire-5 for geometry modeling and ANSYS FLUENT and CFD for analysis purpose.

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