EnginSoft International Conference 2011 |
Numerical Optimization of the Exhaust Ow of a
High-Perfomance Engine |
Costa Marco - Università di Bologna (Italy) |
Abstract |
An automotive catalytic converter is one of the most fragile component of the exhaust system and in uences deeply its design. Particoularly, the design of the exhaust pipes should garantee a good uniformity of ow inside the monolith and low pressure gradients in order to achieve a high eciency and durability of the catalytic converter. On the other hand, a high-perfomance engine requires an exhaust system with the minimum pressure drop. The use of a joined approach based on 3D CFD and optimizing tools can highly improve the design fullfilling different objectives: high engine performance, high emission reduction and a long durability of the catalytic converter. The embedded CAD instruments of the CFD code Star-CCM+ can be lead by modeFRONTIER to modify the exhaust system geometry in order to achieve the aforementioned objectives. The numerical methodology was
developed and validated on a real exhaust system leading either to increase catalytic convert eciency and to decrease the pressure drop. |
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