| NUMERICAL DRAG REDUCTION OF A GROUND VEHICLE BY
NACA2415 AIRFOIL STRUCTURED VORTEX GENERATOR AND
SPOILER |
Bayindirli Cihan
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| Nigde Omer Halisdemir University |
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| ABSTRACT |
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Using of computational fluid dynamics (CFD) have big advanteges for design process components in the
automotive industry. Flow structures around vehicle and drag forces can investigate in CFD without producing real size
prototype vehicle. The drag force affect fuel efficiency and drivability too. In this study, the drag coefficient of 1/15 scale
minibus model was minimizated by NACA 2415 airfoil structured vortex generator and front spoiler in Fluent®. Flow analyses
were performed at the 5 different free stream velocities in the range of 2.8 × 105 - 6.6 × 105 Reynolds numbers, where the
dynamic similarity condition was provided. The drag coefficient of base minibus model was 0.415. The CD coefficient of the
model minibus was decreased 10.94 % with original designed NACA 2415 airfoil structured vortex generator in model 1. In
total of 22.59 % drag reduction was obtained by designed front spoiler. The effect of this drag reduction on fuel consumption
about 6 ~ 12 % at high vehicle speeds. |
| Key Words:
CD coefficient, Minibus model, CFD, Vortex generetor, NACA2415, Front spoiler |
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Corresponding Author.
Bayindirli Cihan , Email. 
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