Comparison of Various Drag Reduction Devices and Their Aerodynamic
Effects on the DrivAer Model 06-11-03-0019
This also appears in
SAE International Journal of Passenger Cars - Mechanical Systems-V127-6EJ
In this study, two types of drag reduction devices (a horizontal plate, and a
vertical plate) are used to weaken the downwash of the upper flow and c-pillar
vortex of the DrivAer notchback model driving at high speed (140 km/h). By
analyzing and comparing 15 cases in total, the aerodynamic drag reduction
mechanism can be used in the development of vehicles. First, various CFD
simulation conditions of a baseline model were compared to determine the
analysis condition that efficiently calculates the correct aerodynamic drag. The
vertical plate and horizontal plate applied in the path of the c-pillar vortex
and downwash suppressed vortex development and induced rapid dissipation. As a
result, the application of a 50-mm wedge-shaped vertical plate to the trunk
weakened the vortex and reduced the drag by 3.3% by preventing the side flow
from entering the trunk top. The installation of a 150 mm horizontal plate at
the trunk to decrease downwash reduced the drag by 5.1% by improving the bottom
and side flow.
Citation: Cho, J., Park, J., Yee, K., and Kim, H., "Comparison of Various Drag Reduction Devices and Their Aerodynamic Effects on the DrivAer Model," SAE Int. J. Passeng. Cars - Mech. Syst. 11(3):225-238, 2018, https://doi.org/10.4271/06-11-03-0019. Download Citation
Author(s):
Junho Cho, Joonmin Park, Kwanjung Yee, Hak-Lim Kim
Affiliated:
Seoul National University
Pages: 14
ISSN:
1946-3995
e-ISSN:
1946-4002
Related Topics:
Drag
Computational fluid dynamics
Aerodynamics
Trunks
Simulation and modeling
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