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논문 기본 정보

자료유형
학위논문
저자정보

Sun Qingzhu (서울과학기술대학교, 서울과학기술대학교 대학원)

지도교수
김철호
발행연도
2016
저작권
서울과학기술대학교 논문은 저작권에 의해 보호받습니다.

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The purpose of this study is to evaluate and analyze the influence of the Rear-diffuser Angle and the length of Rear-diffuser Angle on aerodynamic Lift Force. And then discuss the driving stability with the different Lift Force. There are 4 models in this research use for compare, and will be analysed from pressure distribution, CL and CD, as well as the vortex behind the vehicle. 2 of models are Original Model and rest 2 with different Rear-diffuser Angle setting. A series of experimental investigations regarding aerodynamic performance on different Rear-diffuser Angles were conducted. To gain further understanding of the flow mechanism, numerical simulations were also performed to investigate the detailed flow fields and pressure distributions.

목차

I. Introduction 1
1.1 Background and Purpose 1
II. Aerodynamic Characteristics 6
2.1 Flow Phenomena 6
2.1.1 Aerodynamic Resistance 6
2.1.2 Pressure Lift 8
2.2 Aerodynamic Characteristics 10
III. RESEARCH APPROACH 12
3.1 Model 12
3.2 Numerical Details 16
3.2.1 Numerical Analysis Theory 16
3.2.2 Coordinate system 18
3.2.3 Lattice Formation 19
3.2.4 Boundary Initial Condition 20
IV. Result and Discussion 21
4.1 Original Models Compare (YuYan and MINI) 21
4.1.1 Analysis by CFD 21
4.1.2 Result Compare 24
4.2 New Design Models Compare 26
4.2.1 Analysis by CFD 26
4.2.2 Result Compare 29
4.3 Driving Stability 33
V. Conclusion and Recommendation 35
VI. Reference 36
VII. Acknowledgments

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