Comparison of Various Drag Reduction Devices and Their Aerodynamic Effects on the DrivAer Model

被引：9

作者：

Cho, Junho ^{[1
]}

Park, Joonmin ^{[1
]}

Yee, Kwanjung ^{[2
]}

Kim, Hak-Lim ^{[3
]}

机构：

[1] Seoul Natl Univ, Seoul, South Korea

[2] Seoul Natl Univ, Inst Adv Aerosp Technol, Seoul, South Korea

[3] Hyundai Motor Co, Seoul, South Korea

来源：

SAE INTERNATIONAL JOURNAL OF PASSENGER CARS-MECHANICAL SYSTEMS | 2018年 / 11卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Automotive aerodynamics; Aerodynamic drag; Aerodynamic drag reduction device; Computational Fluid Dynamics (CFD);

D O I：

10.4271/06-11-03-0019

中图分类号：

U [交通运输];

学科分类号：

08 ; 0823 ;

摘要：

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.

引用

页码：225 / 237

页数：13

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