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研究生: 楊青發
Duong Thanh Phat
論文名稱: 側風中自行車模型的CFD分析
CFD ANALYSIS OF THE CYCLIST MODEL IN CROSS WIND
指導教授: 苗君易
Miau, Jiun-Jih
學位類別: 碩士
Master
系所名稱: 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年: 2022
畢業學年度: 110
語文別: 英文
論文頁數: 78
外文關鍵詞: CFD, cyclist, side force, cross wind
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  • For cyclists, the wind plays an important role because it powerfully affects their performance, bicycle control, balance, and moreover, their safety. The cross wind, in particular, even has a greater impact on the cyclist. In the cross wind, the side force applied to the cyclist would increase.
    The aim of this study is to use CFD simulation for studying the flow phenomena around the cyclist in cross wind scenarios. With the results obtained by CFD simulation such as: wall shear stress, distribution of pressure, the wake behind the cyclist model, the flow phenomena around the cyclist model are studied in cross wind scenarios.
    Keyworks: CFD, cyclist, side force, cross wind.

    TABLE OF CONTENTS ACKNOWLEDGEMENT VIII TABLE OF CONTENTS IX LIST OF TABLE XI LIST OF FIGURE XII NOMENCLATURE XVI CHAPTER I INTRODUCTION 1 1.1 Overview of Research 1 1.2 Motivation of Study 1 1.3 Thesis Outline 3 CHAPTER II LITERATURE REVIEW 4 2.1 Cycling aerodynamics 4 2.2 Cyclist position 5 2.3 Aerodynamic research in wind tunnel 6 2.4 Aerodynamic research in CFD 10 CHAPTER III METHODOLOGY 18 3.1 Aerodynamic force and moments 18 3.2 CFD fundamental 19 3.3 Turbulence modelling 21 3.4 Computational grid 24 3.5 Numerical setting 28 3.6 CFD validations 30 CHAPTER IV RESULTS AND DISCUSSION 33 4.1 Aerodynamics force coefficients 33 4.2 Pressure distribution 38 4.3 Wake behind the cyclist 49 4.4 Wall shear stress line 62 CHAPTER V CONCLUSION AND SUGGESTIONS 70 5.1 Conclusion 70 5.2 Future work 71 REFERENCES 72

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