以可遙控縮尺模型實驗研究橫向主動繫泊技術之水翼操作

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研究生：	昂古司 Baharudin, Agus
論文名稱：	以可遙控縮尺模型實驗研究橫向主動繫泊技術之水翼操作 Experimental Study of Hydro Sail Operations for the Cross-stream Active Mooring Technique using a Remote Controllable Scale Model
指導教授：	曹哲之 Tsao, Che-Chih
口試委員:	蕭德瑛 Shaw, De-in 張禎元 Chang, Jen-Yuan 蔣小偉 Chiang, Hsiao-Wei
學位類別：	碩士 Master
系所名稱：	工學院 - 動力機械工程學系 Department of Power Mechanical Engineering
論文出版年：	2023
畢業學年度：	111
語文別：	英文
論文頁數：	142
中文關鍵詞：	海洋潮流發電、蜿蜒流動、可遙控式潛浮水翼
外文關鍵詞：	Ocean Current Power, Meandering Flow, Controllable Submersible Hydro Sail
相關次數：	點閱：2 下載：0
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海洋洋流的蜿蜒流路（即流路偏差）可能會影響海洋渦輪發電機的效率，因為發電功率與流經渦輪發電機的流速的立方成正比。為此，提出了橫向主動繫泊（CSAM）技術。CSAM系統利用一個附著在潛浮於水中渦輪發電機上的水翼，作為可調節的繫泊裝置，用來穩定和控制渦輪發電機的位置。為了優化能量提取，水翼可以調整俯仰和滾動角度，以將渦輪發電機與海洋流的速度核心對齊，並調整渦輪發電機的深度。本研究使用1/250的遠程可遙控比例模型，探索根據CSAM概念設計和操作水翼的方法。水翼的基本功能包括調整水翼的俯仰角度以增加或減少佈置角度，調整滾動角度以使其處於潛水姿態，以及透過翻轉水翼將系統水平拉過主纜繩的另一側。修改後的模型在一個有循環流的水缸和游泳池中進行了測試，並配備造流機。調整水翼模型內部的浮力機制，研究和演示了佈置角度、滾動和潛水等操作。根據實驗，水動力學係數（如升力和阻力係數）隨著攻角增加而增加。此外，系統的佈置角度也可以通過調整水翼的攻角來控制。攻角越大，主要的佈置角度就越低，反之亦然。

Ocean current meandering, i.e., flow path deviation, can impact the efficacy of a marine power generation turbine because the power output is proportional to the cube of the speed of the flow passing thruogh the turbine. The Cross-Stream Active Mooring (CSAM) technique has been proposed to address this challenge. The CSAM system utilizes an underwater Hydro Sail that is attached to a submersible generator turbine unit, which acts as an adjustable mooring device to stabilize and control the position of the generator turbine unit. To optimize energy extraction, the Hydro Sail can adjust the pitch and roll angles to align the generator turbine unit with the velocity core of the marine current and adjust the depth of the generator turbine unit. This study uses a 1/250 remote-controllable scale model to explore the design and operation of the Hydro Sail according to the CSAM concept. The Hydro Sail's essential functions include adjusting the pitch angle of the Sail to increase or decrease the deployment angle, adjusting the roll angle to position it in a diving pose, and rolling over to pull the system horizontally across the current to the opposite side. The modified model was tested in a small water tank with circulating flow and a university swimming pool with a flow generator. Using the internal buoy-ballast mechanism in the Hydro sail model, operations such as changing deployment angle, rolling, and diving maneuvers were studied and demonstrated. Based on the experiments, the hydrodynamic coefficient such as lift and drag coefficient increased as the angle of attack increased. Furthermore, the same goes to the system deployment angle which can be controlled by adjusting the Hydro Sail angle of attack. The bigger Hydro sail angle of attack, the lower main deployment angle was, and vice versa.

ABSTRACT    i
摘要    ii
Table of Content    iii
List of Figures    v
List of Tables    xi
List of Symbols    xii
Chapter 1 Introduction    1
1.1 Motivation    1
1.2 Typical systems for marine current power generation    3
1.2.1 Tidal kite systems    4
1.2.2 Submerged floating turbine systems    5
1.2.3 Floating systems    10
1.3    The Cross-stream Active Mooring technique    13
1.3.1 Basic concept    13
1.3.2 Previous studies on the CSAM technique    20
Chapter 2 Research Goals and Methods    31
2.1 Research goals    31
2.2 Research Methods    31
2.2.1 Scaling and models    31
2.2.2 Experiments to conduct    35
Chapter 3. Facilities, Models and Experimental Setups    37
3.1 Facilities: Water tank and swimming pool facilities    37
3.2 Hydro Sail model    40
3.2.1 Mechanical construction    40
3.2.2 Electrical and control system construction    45
3.2.3 Hydro Sail improvements    50
3.3 Experimental setups    63
3.3.1 Measuring hydrodynamic coefficients of Hydro Sail    63
3.3.2 Operating and observing a single stage CSAM system    70
Chapter 4 Results    80
4.1 Controlling buoy-ballast position to change Hydro Sail roll angle    80
4.2 Controlling elevator angle to change Hydro Sail angle of attack    84
4.3 Measuring hydrodynamic coefficients    86
4.4 Diving maneuver    92
4.4.1 Diving with flat elevator angle    92
4.4.2 Diving depth control by changing elevator angle    96
4.5 Cross-stream operation    100
4.5.1 Rolling to change sides    100
4.5.2 Deployment angle control by changing elevator angle    102
4.6 Dynamic operations    116
Chapter 5. Conclusion and Future Work    119
References    123
Appendix A. Scalable flow field establishment    126
Appendix B. Calculation of lift and drag of the submersible wing model.    135
Appendix C. Analysis and design software program files for this study    139

                                

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