지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2011.5
- 수록면
- 1,631 - 1,637 (7page)
이용수
초록· 키워드
오류제보하기
Effect of wheel configuration to aerodynamic drag is investigated by using full scale wind tunnel test and current state-of-the-art CFD technique. S2A wind tunnel located in St-Cyr, France and commercial CFD software based on Lattice Boltzmann Method were used for wind tunnel test and CFD simulation, respectively.
Total 6 wheels out of three different sizes (15”, 16”, and 17”) were tested for both hatch back and square back vehicle and it is shown that there is positive relation between wheel size and CdA. To find dominant wheel design parameter, several modified wheels of 17” twin spoke wheel by changing spoke shape and porosity were tested and it is found that CdA effect of wheel shape is about 15 count (1 count = 0.001㎡) and spoke shape is more important than porosity for low aerodynamic drag.
For the deep understanding of flow structure, air flow simulations were conducted. For the accurate analysis, road simulator (rotating wheel and moving floor) was implemented by using sliding mesh technique. Difference between CFD and WT test is compared and current simulation can be used as an upstream development stage. Contribution of wheel and tire to vehicle aerodynamic drag is analyzed and it is concluded that the effect of wheel shape to the vehicle aerodynamic environment is local and little effect to overall wake structure.
Total 6 wheels out of three different sizes (15”, 16”, and 17”) were tested for both hatch back and square back vehicle and it is shown that there is positive relation between wheel size and CdA. To find dominant wheel design parameter, several modified wheels of 17” twin spoke wheel by changing spoke shape and porosity were tested and it is found that CdA effect of wheel shape is about 15 count (1 count = 0.001㎡) and spoke shape is more important than porosity for low aerodynamic drag.
For the deep understanding of flow structure, air flow simulations were conducted. For the accurate analysis, road simulator (rotating wheel and moving floor) was implemented by using sliding mesh technique. Difference between CFD and WT test is compared and current simulation can be used as an upstream development stage. Contribution of wheel and tire to vehicle aerodynamic drag is analyzed and it is concluded that the effect of wheel shape to the vehicle aerodynamic environment is local and little effect to overall wake structure.
목차
Abstract
1. 서론
2. 풍동 시험
3. 수치 해석
3. 결론
References
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UCI(KEPA) : I410-ECN-0101-2013-556-001356449