本研究探討在不同風速下碟盤溫度的散熱特性，透過理論分析及實驗驗證裝有散熱鰭片及無散熱鰭片之碟盤溫度的結果，二者在開發的測試台中進行實驗，並記錄碟盤其溫升及散熱之結果。
本研究在相同的初始碟盤溫度及環境溫度的情況下進行實驗，針對裝有散熱鰭片及無散熱鰭片施加一相同轉速、來令片的夾持及鬆放時間，並記錄在碟盤的溫升及散熱的情形，在實驗中發現有鰭片之碟盤與來令片摩擦時溫度比較不容易上升，但裝有散熱鰭片之碟盤在自然散熱時的散熱結果較不理想。因此進行強制散熱的後續實驗，結果發現有鰭片碟盤的散熱時間較無鰭片碟盤的短，因為此時有鰭片之碟盤繼續保持旋轉且持續送風，空氣與碟盤間的對流狀況變好，使得熱量可以藉由鰭片中的導通透孔及鰭片所增加的表面積帶走，可以有效地帶走熱量，不會使碟盤因為高溫而產生變形，進而造成煞車失效。

This study investigates the heat dissipation characteristics of a disc under different wind speeds. The results of disc temperatures with and without heat fins are theoretically analyzed and experimentally verified. Both scenarios are tested on a developed test platform, and the temperature rise of the disc as well as the heat dissipation outcomes are recorded.
Under the same initial disc temperature and ambient temperature conditions, the experiments involve applying the same rotational speed, clamping and releasing duration to the disc with and without heat fins. The temperature rise of the disc and heat dissipation are documented. During the experiment, it was observed that the disc with fins experienced less temperature increase during friction with the brake pads. However, the heat dissipation results of the disc with heat fins were less satisfactory during natural cooling. Therefore, subsequent experiments were conducted to assess forced heat dissipation. The results revealed that the heat dissipation time of the disc with fins was shorter than that of the disc without fins. This was attributed to the disc with fins maintaining its rotation and continuous airflow during forced cooling. This improved the convection between the air and the disc, allowing heat to be effectively carried away through the conduction holes in the fins and the increased surface area provided by the fins. This efficient heat dissipation prevented disc deformation due to high temperatures, thereby avoiding brake failure.

摘要 ........................................................................................................................ i
Abstract ................................................................................................................. ii
誌謝 ...................................................................................................................... iii
目錄 ...................................................................................................................... iv
表目錄 ................................................................................................................ viii
圖目錄 .................................................................................................................. ix
符號說明 ............................................................................................................. xii
第一章 緒論 ......................................................................................................... 1
1.1 前言 ........................................................................................................ 1
1.2 自行車煞車系統 .................................................................................... 1
1.3 研究方式 ................................................................................................ 2
1.4 文獻探討 ................................................................................................ 3
1.5 論文架構 ................................................................................................ 4
第二章 基礎理論及軟體介紹 ............................................................................. 5
2.1 有限元素法 ............................................................................................ 5
2.1.1 有限元素法平衡方程式 ............................................................. 6
2.1.2 有限元素分析重要名詞 ............................................................. 7
2.1.3有限元素類別 .............................................................................. 8
2.1.4 Ansys ....................................................................................... 10
2.2 有限體積法 .......................................................................................... 11
2.2.1 Fluent .......................................................................................... 12
2.3 流體動力學 .......................................................................................... 13
2.3.1 統御方程式 ............................................................................... 13
2.3.2 紊流模式 ................................................................................... 14
2.3.3 計算流體動力學 ....................................................................... 15
2.4 暫態熱傳 .............................................................................................. 15
2.4.1 熱傳導 ....................................................................................... 16
2.4.2 熱對流 ....................................................................................... 16
第三章 模擬設定及模擬結果 ........................................................................... 17
3.1 有限元素分析 ...................................................................................... 17
3.1.1 建立有限元素模型 ................................................................... 17
3.2 材料參數 .............................................................................................. 18
3.3 幾何模型 .............................................................................................. 18
3.4 網格化 .................................................................................................. 20
3.4.1 收斂性分析 ............................................................................... 20
3.5 邊界條件設定 ...................................................................................... 21
3.5.1 結構分析 ................................................................................... 21
3.5.2 熱分析 ....................................................................................... 22
3.5.3 流場散熱分析 ........................................................................... 25
第四章 實驗介紹及結果 ................................................................................... 34
4.1 實驗設備 .............................................................................................. 34
4.1.1自行車煞車碟盤測試台 ............................................................ 34
4.1.2 自行車煞車碟盤 ....................................................................... 37
4.1.3 熱像儀 ....................................................................................... 38
4.1.4 風速機組 ................................................................................... 39
4.2 實驗方法 .............................................................................................. 40
4.3 實驗結果 .............................................................................................. 42
第五章 分析與實驗結果比較 ........................................................................... 47
5.1 碟盤溫度記錄 ...................................................................................... 47
5.1.1 碟盤A溫度記錄 ...................................................................... 47
5.1.2 碟盤B溫度記錄 ....................................................................... 49
第六章 結論與未來展望 ................................................................................... 53
6.1 結論 ...................................................................................................... 53
6.2 未來展望 .............................................................................................. 53
參考文獻 ............................................................................................................. 54
Extended Abstract ............................................................................................... 56

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