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논문 기본 정보

자료유형
학술대회자료
저자정보
송봉하 (한국지엠) 이규익 (한국지엠) 하종백 (한국지엠)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2011년 한국자동차공학회 학술대회 및 전시회
발행연도
2011.11
수록면
1,746 - 1,752 (7page)

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초록· 키워드

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These days, the fuel economy of road vehicles is getting important all over the world due to the several reasons such as the depletion of fossil fuel, high fuel cost, and stringent regulation of toxic exhaust gas from conventional internal engine combustion. Therefore, all auto makers have been requested to develop a vehicle with high fuel efficiency as a demand of times. In this view point, aerodynamics is well known as a big potential which can contribute considerably to solve these demands from customers. Total drag of road vehicle is mainly composed of three parts, exterior skin effect from upper body, underbody effect, and engine room’s flow recirculation effect driven by engine cooling air flow. Especially, drag increment from engine cooling air flow needs to be minimized for better aerodynamic performance through the optimization of front-end styling. However, P/T cooling performance has also to be considered carefully because there is a trade-off relationship between aerodynamics and engine cooling performance. In this research, the drag impact on cooling air flow was studied using CFD analysis. Aerodynamics friendly cooling air flow system is completed by the optimization of front grille inlet opening, cooling air outlet, and CRFM sealing, which is represented by baffle and gap seal. The analysis results showed that grille inlet opening could be closed by reducing the leakage of cooling air flow from grille inlet to heat exchanger. Finally, the closing of noneffective grille inlet opening driven by the optimization of CRFM sealing using baffle and gap seal gave us dramatic aerodynamic saving effect, and therefore it will help the fuel economy. The size of cooling air outlet also showed that the bigger the size, the better the aerodynamic performance.

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Abstract
1. 서론
2. 수치해석 기법 및 경계조건
3. 냉각 공기 유동 시스템
4. 해석결과
5. 결론
References

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UCI(KEPA) : I410-ECN-0101-2013-556-001415323