Airflow Analysis of Engine Cooling Grille using Computational Fluid Dynamics
Engine-bay-cooling system is an important part of the vehicle engine, maintaining the operating temperature. One
of the factor determines heat-transfer efficiency of the system is the inflow air velocity which is controlled by the grille shape.
A specific military vehicle designed for amphibious use intakes cooling air from the top of the vehicle via high performance
exhaust fan. The grille and engine bay are modelled and analyzed by computational fluid dynamics to determine the suitable
grille shape. The simulation has shown that vehicle speed has insignificant effect on the amount of air intake, and the grille
blade setting at 45-degree gives the highest flow velocity into the engine bay.
Index Terms - Engine bay cooling system, cooling grille, CFD