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논문 기본 정보

자료유형
학술대회자료
저자정보
Sun Qingzhu (Seoul National University of Science and Technology) Chul-Ho Kim (Seoul National University of Science and Technology)
저널정보
한국자동차공학회 한국자동차공학회 춘계학술대회 2018 한국자동차공학회 춘계학술대회
발행연도
2018.6
수록면
1,033 - 1,038 (6page)

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Numerical study is performed to evaluate the influence of the notchback Rear-diffuse Angle on aerodynamic. The relationship between aerodynamic and Rear-diffuser Angle is summarized, and the flow mechanism is analyzed and discussed to have the detail understanding the effect of the Rear-diffuser Angle to aerodynamic. Rear-diffuser Angle is an important factor influencing the wake structure and optimizing the vehicle rear diffuser at a favorable angle can contribute to reduce the drag force and improve the wake structure. The wakes of blunt bodies play important roles in their aerodynamic characteristics.
As a passenger vehicle is a typical blunt body, the wakes behind these types of vehicle markedly influence their aerodynamic characteristics. Over the past several decades, many investigations of the wake structure of passenger vehicle have been carried out on the upper-rear region. Ahmed et al.[1] performed an experimental study of the effects of base slant angle of a hatchback shape on the time-averaged properties of the wake. They proposed a wake vortex system for hatchbacks. Subsequently, Nouzawa et al.[2] investigated the wake structure of the notchback type vehicle. They structured a flow pattern for notchbacks with no rear diffuser slant. Their results indicated that the aerodynamic drag could be increased by generation of the trailing vortex at the trunk-deck and the so-called arch vortex behind the backlight. These studies improved our understanding of the influence of the upper-rear shape on wake structure.

목차

Abstract
1. INTRODUCTION
2. RESEARCH APPROACH
3. RESULTS AND DISCUSSION
4. CONCLUSION
References

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