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디바이더를 장착한 세단 자동차의 리어 디퓨저 주위의 유동해석Flow Analysis of Sedan Car with a Divider around the Rear Diffuser

Other Titles
Flow Analysis of Sedan Car with a Divider around the Rear Diffuser
Authors
김나용김봉환
Issue Date
2021
Publisher
한국기계기술학회
Keywords
Rear diffuser; Divider; Drag coefficient; Lift coefficient; Pressure coefficient; CFD; 리어 디퓨저; 칸막이; 항력계수; 양력계수; 압력계수; 전산유체역학
Citation
한국기계기술학회지, v.23, no.1, pp 56 - 63
Pages
8
Indexed
KCI
Journal Title
한국기계기술학회지
Volume
23
Number
1
Start Page
56
End Page
63
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/4367
DOI
10.17958/ksmt.23.1.202102.56
ISSN
1229-604X
2508-3805
Abstract
This study was performed to analyze the effect on driving performance by identifying the flow characteristics of the rear diffuser such as drag coefficient, lift coefficient, velocity vector, velocity streamlines, turbulence kinetic energy and vortex-core region according to the angle of the sedan rear diffuser and the shape of the divider. The angle of the diffuser was analyzed at 2° intervals from 0° to 18°, and the divider was analyzed by changing from one to five. The three-dimensional modeling was performed using CATIA V5 and the vehicle model was selected as a sedan car in the form of an LF Sonata. The CFD analysis was performed in order to identify the flow characteristics of rear diffuser using ANSYS CFX 14.5.7. For each model, the analysis was performed under each condition with speeds of 80km/h, 100km/h, 120km/h, 140km/h. The results of the flow analysis showed that the rear diffuser angle was the best result in driving stability at 6°. The results of the study on the number of dividers showed the best result value in driving stability when the rear diffuser angle was 6° and the divider was 3 and selected as the optimal shape.
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융합기술공과대학 > Department of Automotive Engineering > Journal Articles

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