19권 4호 137-145 2011 [한국자동차공학회 논문집 ]
| 제목 | 승용차의 후면 형상 변형이 공기저항 감소에 미치는 영향 |
|---|---|
| 분야 | 차량동역학 및 제어 |
| 언어 | Korean |
| 저자 | 송기선(서울대학교), 강승온(서울대학교), 박훈일(서울대학교), 기정도(현대자동차), 김규홍(서울대학교), 이동호(서울대학교), 전상욱(서울대학교) |
| Key Words | Computational fluid dynamics(전산유체역학), YF SONATA(YF 소나타), Drag coefficient(항력계수), COANDA-effect(코안다 효과), Trunk rear edge(트렁크 끝단 라인), Side rear edge(측면 후방 라인), Rear undercover(후방 하부 라 |
| 초록 |
This paper suggests possible rear body shape modifications of a passenger car for the improvement of aerodynamic performance, based on the CFD analysis results. YF SONATA, a passenger car of Hyundai Motors Company, plays a major role as the baseline car in this research. Representatively, three parts(trunk rear edge, side rear edge and rear undercover) are modified in a small range in order for the total outer shapes not to be changed enough so that the modified car is not considered different, compared with the baseline. Specifically, using computational fluid dynamics, aerodynamic drag reduction is accomplished maximally about 11% in this research. Finally, it is proved that although the range of changes of the rear body shapes of a passenger car is very strictly confined, by changing a small range of rear body shapes alone the enhancement of aerodynamic performance of a passenger car can be significantly accomplished. |
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