Abstract
The Formula SAE is competitions which held by Society of Automotive Engineers. The Formula SAE competition challenge teams of university undergraduate and graduate student to design, develop and compete with a small formula-style vehicle. Aerodynamics is crucial at these series of events to demonstrate the high performance of the vehicle. Aerodynamic packages such as rear wing are significant to produce downforces. Therefore, slips could be reduced and increasing cornering performances. The objective of the research was to study the aerodynamic comparison between rear wing addition by using Eppler 423 Airfoil in a different angle of attack. The rear wing is attached on Ahmed body with 30° rear slant which is scaled as formula student car. These studies were done in three dimensional (3D) computational fluid dynamic (CFD) simulation in 3 different velocities, 60 kmph, 80 kmph and 100 kmph.. The results of these researches are the best angle of attack at 12°. At this angle of attack has lift coefficient -0.4516 and drag coefficient 0.4253.
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