CFD computations for modern piston engines
Thierry GeorjonPSA - Automobiles Peugeot Citroen
Direction de la Recherche et de l'Innovation Automobile
Calculs 3D Physique Moteur
Wednesday, November 21st, 11.00 a.m., CERFACS Conference Room
Abstract :
The major car manufacturers are committed in the reduction of the fuel consumption and the pollutant emissions. Nevertheless, the modern engines must match all the wishes of the customers, who like to have torque and power. To develop the recent and new engines, the engineers have to understand the very complex physical phenomena, as the turbulence, the spray behaviour and the combustion, which are all present within the combustion chamber. The 3D computations are now a part of the design cycle and the capabilities of the industrial CFD codes are large but still limited: a full forecast of real engine cycles using CFD is still a great challenge and the models need a lot of improvement. Fine experiments are used to test drastically the CFD codes and to get always more reliable results. The common rail diesel engines HDi and the gasoline direct injection engines HPi have been successfully designed by using CFD methods among other design processes. New concepts of engines are investigated as well.
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