臺灣博碩士論文加值系統

本研究探討太陽能車車體設計與風阻系數分析，以降低車子在行進時輸出功率損失，獲得晶片輸出功率的最大使用效率，並以太陽能車Phoenix II為本，從車體設計、模擬分析評估到後與德國、澳洲及比利時隊之車體模擬比較，建立合理有效的製作準則。
主要內容可分為三部分。一為太陽能車車體模型及外流場的建立，從草圖、車體曲面、車體實體及外流場實體的包覆建立模型；其二為模型網格的建立，將繪製完成的模型圖檔匯入Gambit©軟體，產生車體與外流場的網格及定義各種邊界條件；最後則使用Fluent©軟體進行各項模擬與分析。
本實驗以Solidworks®軟體進行所需的車體模型及外流場的包覆，接著使用Gambit©產生網格與各項邊界條件，最後匯進Fluent©模擬軟體中進行風阻系數的模擬與分析，以了解太陽能車在行進中所受到的風阻與壓力的分佈；最後推論太陽車的穩定性。
以模擬流場的方法找出車體設計上之優缺點，並進一步針對車體缺點部份改良車體，其結果顯示風阻係數有大幅度減低的趨勢，可有效的提升整體行車的功率消耗，以獲得更大的行車效率，在開發新型車體時可利用本實驗的模擬方法，對車體作初步評估，並進一步改進以獲得更有效率之車體。
本實驗所建立的分析參數、模擬數據及討論結果，未來也可應用於其他太陽能車的研究與發展。

This study investigates the design of solar mobile body and analyzes the drag coefficient so that the power loss during moving can be reduced and the maximum power output of solar cells can be reached. Based on the solar mobile model “Phoenix II”, this work analyzes, simulates and evaluates the design of mobile body, compares the simulations with the solar mobile bodies of the German team, the Australian team, and the Belgium team so that rational and efficient fabricating rules can be established.
This work includes three main parts. First, the model of a solar mobile body is established, including a draft, a surface curve of body, the real body, and a model of its flow over. Next, a model mesh is established. The completed model graphic is then loaded into Gambit© to generate the boundary conditions of mobile body and flow over meshes. Finally, simulations and analyses were run with Fluent©.
In this work, Solidworks® was used to carry out the coating of mobile body model and flow over. Then, meshes and different boundary conditions were generated with Gambit©. Finally, the simulation and analyses of drag coefficient were carried out with Fluent© to understand the distribution of drag and pressure during moving so that the stability of the mobile can be predicted.
The parameter analyses, simulation and discussion results in this work can be applied to further researches and developments of solar cars in the future.

目次
摘要
英文摘要
目次
表目錄
圖目錄
第一章 序論............................................................................................................................1
1.1 前言............................................................................................................................1
1.2 流體分析概況............................................................................................................2
1.3 研究背景與方法........................................................................................................2
1.4 論文架構....................................................................................................................3
第二章 基本理論介紹………….....................................................................................4
2.1 空氣的特性................................................................................................................4
2.1.1 空氣溫度………………………………………………………………………4
2.1.2 空氣壓力………………………………………………………………………4
2.1.3 空氣密度………………………………………………………………………5
2.1.4 空氣黏滯性……………………………………………………………………5
2.1.5 國際標準大氣…………………………………………………………………6
2.2. 大氣基本流動...........................................................................................................7
2.3 作用於車體上的阻力..............................................................................................12
2.3.1 空氣的六個分力………………….................................................................13
2.3.2 壓力阻力……………......................................................................................17
2.3.3 邊界層………………….................................................................................18
2.3.4空氣阻力係數(CD)的研究……………..……………….……………………20
第三章 太陽能車流場模擬分析規劃.................................................................................21
3.1 分析規劃流程..........................................................................................................21
3.2 模型建立..................................................................................................................22
3.3 網格劃分..................................................................................................................24
3.4 模擬分析與測試...............................................................................................32
3.4.1 網格檢查與各項參數設定............................................................................32
3.4.2 模擬測試........................................................................................................34
第四章 模擬果與討論………...............................................................................................48
4.1 各隊車體模擬數據整理..........................................................................................49
4.2 各隊車體相同時速下比較......................................................................................72
4.3 流場線觀察……......................................................................................................75
4.4 車體修改……..........................................................................................................83
4.5 結論..........................................................................................................................85
第五章 結論與展望...............................................................................................................87
參考文獻...........................................................................................................................88

參考文獻
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[2]韓占忠，王敬，藍小平，FLUENT-流體工程仿真計算實例與應用，北京理工大學出版社(2004)。
[3]李添財，汽車空氣動力學，全華書局(2005)。
[4]徐貴，陳永銓，劉張源，流體力學，高立圖書有限公司(1998)。
[5]高金海，畢瑜，Solid Works使用入門，全華書局(1998)
[6]林龍震老師工作室，Solid Works 2007進階設計，博碩文化(2007)
[7]林龍震老師工作室，Solid Works 機械製圖與綜合實例練，博碩文化(2008)
[8]FLUENT 6.3 Tutorial Guide (2006)
[9]GAMBIT 2.4 Modeling Guide (2007)
[10]“Fluent news”, VOL XII ISSUE (2003)
[11]“Designing a Record-Breaking Solar-Power Car”, www.ansys.com ANSYS Solution (2005)。]
[12]賴致全，「太陽能車晶片系統設計與檢測之探討」，南台科技大學碩士論文(2007)
[13]曾子彝，Fluent基礎、進階課程，國家高速網路與計算中心(2008)