EFFECT OF STEADY AIRFLOW FIELD ON DRAG AND DOWNFORCE
- Authors
- Kim, S. C.; Han, S. Y.
- Issue Date
- Apr-2016
- Publisher
- KOREAN SOC AUTOMOTIVE ENGINEERS-KSAE
- Keywords
- Rear spoiler; Downforce; Goose' s flapping; Computational fluid dynamics (CFD); Airfoil
- Citation
- INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY, v.17, no.2, pp.205 - 211
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY
- Volume
- 17
- Number
- 2
- Start Page
- 205
- End Page
- 211
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/23216
- DOI
- 10.1007/s12239-016-0020-2
- ISSN
- 1229-9138
- Abstract
- The purpose of this study is to examine the effect of the steady airflow field of a rear spoiler on the coefficients of drag (C-D) and downforce (C-DF). The type of spoiler is suggested as a two-jointed arm model that mimics the flapping flight mechanism of the Canada goose, Computational fluid dynamics (CFD) technique was used for the steady airflow analysis of a vehicle implemented with various spoiler topologies. We evaluated C-D and C-DF due to the three types of airfoils and the five phases of each airfoil. We obtained the following conclusions from the results: (1) We found that the best cases for C-D and C-DF were the case of Phase 5 and symmetry airfoil, and the case of Phase 1 and reverse airfoil, respectively. (2) It is clear that C-D becomes the largest at Phase 1 of the reverse airfoil, since the eddy magnitude at the rear of the vehicle is the largest, and C-DF also becomes the largest during that phase, since the pressure distribution on the upper surface of the spoiler is very large. (3) As Phase 1 moves to Phase 5 in the same type of airfoil, it is advantageous for C-D and disadvantageous for C-DF, respectively.
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