Air flow Simulation in correlation of the Outside Engine Temperature Change with Variation of the Grill

Abstract

This research is objected to study the effect of air volume variation in the cooling process for the outer wall of vehicle engine. The results were expected to be consideration in Grill’s engineering process in term of better efficiency which is the discussion nowadays. The simulation was executed on a model rebuilt from a rough estimate of one of the existing urban vehicles in Indonesia. This model was performed in computational fluid dynamics software. Four condition of hole’s grill of the vehicle engine were prepared as the main parameters to experiment the air flow which would receive the heat from the outer wall of the engine. These parameters were study to investigate the outer wall temperature of the engine. The results showed that reducing 25% of hole’s area of the grill would increase temperature around 7.4%, the decreasing of 50% of the hole had made the increasing temperature around 28%. The last condition of the decreasing of 75% of the hole had caused the increasing temperature around 400%.