Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effects on Aerodynamic Drag Reduction of a Passenger Car by Rear Body Shape Modifications

승용차의 후면 형상 변형이 공기저항 감소에 미치는 영향

  • Song, Ki-Sun (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kang, Seung-On (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Jun, Sang-Ook (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Park, Hoon-Il (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kee, Jung-Do (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Kyu-Hong (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Lee, Dong-Ho (School of Mechanical and Aerospace Engineering, Seoul National University)
  • 송기선 (서울대학교 기계항공공학부) ;
  • 강승온 (서울대학교 기계항공공학부) ;
  • 전상욱 (서울대학교 기계항공공학부) ;
  • 박훈일 (서울대학교 기계항공공학부) ;
  • 기정도 (서울대학교 기계항공공학부) ;
  • 김규홍 (서울대학교 기계항공공학부) ;
  • 이동호 (서울대학교 기계항공공학부)
  • Received : 2011.01.18
  • Accepted : 2011.03.08
  • Published : 2011.07.01
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Abstract

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.

Keywords

References

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