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研究生：	蔡勝宏 Tsai, Sheng-Hung
論文名稱：	超臨界翼型之穿音速顫振：數值模擬與實驗研究 Transonic Flutter of Supercritical Airfoil: Numerical Simulation and Experiment
指導教授：	黃捷楷 Currao, Gaetano M.D.
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：	2025
畢業學年度：	113
語文別：	英文
論文頁數：	69
中文關鍵詞：	流固耦合(FSI) 、穿音速風洞、顫振、極限環震盪(LCO) 、氣動彈性、震波邊界層交互作用(SWBLI) 、懸臂機翼、超臨界翼型、3D列印彈性機翼
外文關鍵詞：	Fluid Structure Interaction (FSI), Transonic Wind Tunnel, Flutter, Limit Cycle Oscillation (LCO), Aeroelasticity, Shock Wave Boundary Layer Interaction (SWBLI), Cantilevered Wing, Supercritical Airfoil, 3D Printed Camber
相關次數：	點閱：56 下載：4
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本研究旨在探討由鈦合金金屬懸壁板與3D列印的彈性塑膠所組成的超臨界機翼(NASA SC(2)-0012)，在穿音速流動條件下的氣動彈性響應。本研究聚焦於在不同攻角下所引發的顫振(Flutter)與極限環震盪(LCO)之特性以及物理屬性。整體的目標是透過數值模擬與實驗驗證，提升對氣動彈性現象的預測之可靠性。數值模擬結果已成功透過實驗數據進行驗證，兩者在系統之自然頻率(彎曲模態 75 Hz，扭轉模態 190 Hz )及其動態響應皆展現了良好的一致性。在高初始攻角( 8° )下，系統進入了接近極限環震盪(LCO)的狀態。對此現象的分析顯示，其為以扭轉為主導之失速顫振，發生於約 139 Hz 的頻率。

This study aims to investigate the aeroelastic response of a cantilevered supercritical wing (NASA SC(2)-0012), composed of 3D printed flexible plastic camber and a titanium alloy plate, under transonic flow condition (? = 0.8). This study focus on the characteristics and physical properties of flutter and limit cycle oscillation (LCO) induced at different angle of attack. The overall objective is to enhance the predictive reliability for aeroelastic phenomena through the numerical simulation and experimental validation. The numerical simulation was successfully validated against experimental data, showing good agreement for the natural frequency of the test model (Bending mode at 75 ?? and torsional mode at 190 ??) and its dynamic response. At high initial angle of attack (8°), the system was found to enter a limit cycle oscillation (LCO). Analysis of this instability shows it as torsion dominated stall flutter, occurring at a frequency of 139 ??.

Abstract I 
摘要 II 
Acknowledgement  III 
Table of Contents  IV 
List of Tables  VI 
List of Figures VII 
Nomenclatures IX 
Introduction 1 
1. Research Aims and Objectives 1 
2. Scope of the Research 1 
3. Thesis Outline 2 
Literature Review 2 
1. Transonic Flow 2 
2. Shock-Boundary Layer Interaction 2 
3. Supercritical Airfoil 3 
4. Fluid-Structure Interaction (FSI) 3 
5. Aeroelasticity 4 
6. Buffet 4 
7. Flutter 5 
8. Limit-Cycle Oscillation (LCO) 6 
Experimental Setup 7 
1. Wind Tunnel Model 7 
2. Laser Scanner 9 
3. High Speed Camera 9  
4. Transonic Wind Tunnel 9 
5. Mechanical Characterization 10 
Numerical Works 13 
1. Fluid Solver 13 
2. Wall Refinement Study 14 
3. Mesh Independent Study 16 
4. Mesh 19 
5. Shear Locking Effect 21 
6. Time Independent Study 24 
Results 25 
1. Twist Effect 25 
2. Two -Way FSI Simulation 34 
3. Experimental Result 39 
4. Large Initial Angle of Attack Case 46 
Conclusion 52 
References 54 
Appendix 56
                                    

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