Evaluation of Spoiler Design on the Aerodynamic Performance of an Energy-Efficient Car Prototype Body
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The aerodynamic performance of the prototype body shape of an energy-efficient car can be analyzed from the coefficient of drag (Cd) and coefficient of lift (Cl) values arising from the airflow profile on the vehicle body. The aerodynamic car body affects the fuel consumption and mileage of the vehicle. The spoiler component functions to regulate the shape of the airflow on the car body when driving so that the Cd and Cl values can be varied which aims to improve the aerodynamic characteristics of the vehicle body. In this study, a spoiler design study was conducted using CFD simulation on Solidworks software, the simulation parameters were varied by setting the air speed on the inlet side to 40 km/h, 60 km/h, and 80 km/h. The simulation results show that the use of a spoiler with dimensions of 200 mm x 137.662 mm x 46.1 mm with an Angle of Attack (AoA) of 40.44° can reduce Cd by 6.96% - 14.01% and Cl by 21.35% - 25.93%. The use of a spoiler also changes the wake region at the rear of the prototype body, indicating a reduction in drag at the rear of the prototype body design.
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