臺灣博碩士論文加值系統

本研究無油螺旋壓縮機針對第二級壓縮執行模擬分析與實驗數值比較，水套、進氣、排氣端流體與機殼模型透過ANSYS SpaceClaim軟體逐一繪製，轉子壓縮則以Twin-Mesh軟體產生轉子的旋轉網格，再匯入CFX熱流模組，以模擬壓縮機之壓縮過程流場情況，並確認最終輸出壓力達到 9 大氣壓。
無油壓縮機實驗方面是實際操作委託廠商設計之目標，並透過委託廠商實驗室測試機台手動與自動紀錄壓力、溫度、風量與耗功等資料，並與齒型設計開發軟體比對理論風量容積，計算其效能。
無油螺旋壓縮機流場方面，第一目標，模擬由委託廠商設計之無油螺旋壓縮機齒型，執行流場分析並比較理論風量與計算理論容積效率；第二，應用前段提及實驗數據作為模擬的初始條件，更改進氣風量再執行模擬，再與實驗數值溫度、壓力、風量、效能、受力與扭矩驗證分析；第三，運用修改齒型軟體更改接觸線長短與洩漏三角形面積的齒型，以達到優化之性能；第四，本研究針對模擬無油壓縮機加入水套與機殼執行熱傳交換，以達到轉子壓縮降溫效果並觀察溫度差異變化。

Computational Fluid Dynamics （CFD） is a common and corroborated simulation method in research of the analysis fluid systems. This thesis shows workflow, performs simulation analysis and compares experimental numerical for the Oil-free screw compressor. It is a dry flow for two stages twin-screw compressor with air. The simulation is performed by ANSYS CFX, which the computational grids for the rotational section are derived from the grid generator Twin-Mesh. Confirm that the final output pressure reaches 3 bar for first stage and 9 bar for second stage.
First goal of the thesis is to simulate Oil-free Screw Compressor, design by commissioned manufacturer. Perform flow field analysis and compare the theoretical volume of theoretical volumetric efficiency. Second, use the experiment initial conditions to simulate and compare with the experimental numerical temperature, pressure, air volume, efficiency, force and torque. Thirdly, rotors will be optimize performance by changing length of contact line and area of the leaked triangle. Fourthly, try to simulate heat transfer exchange between water jacket and casing for cooling rotors compression chamber and observing the temperature difference.

誌　　謝 1
摘　　要 2
ABSTRACT 3
目　　錄 4
圖目錄 6
表目錄 9
第一章 緒論 10
1-1 前言 10
1-2 研究目的 14
1-3 文獻回顧 15
1-4 論文結構 22
第二章 應用理論與軟體介紹 24
2-1 流場統御方程式 24
2-2 數值方法 28
2-3 應力與應變 30
2-4 軟體介紹 31
第三章 實驗量測方法 32
3-1 實驗流程 32
3-2 管道流線圖 35
3-3 實驗材料設備 39
3-4 實驗測試結果 42
第四章 理論模擬分析 45
4-1 模擬步驟 45
4-2 模擬模型建構 46
4-3 建立模型網格 54
4-4 初始、邊界與求解條件 61
4-5 流固接觸面設定 65
4-6 計算組態設定 66
4-7 理論參數流場模擬結果 68
4-8 實驗參數流場模擬結果 75
第五章 修改齒型模擬分析 82
5-1 修改齒型結構、網格與邊界條件設定 82
5-2 修改齒型參數流場模擬結果 87
第六章 實驗與流場模擬分析結果 94
6-1 流場模擬與理論數值結果比較 94
6-2 流場模擬與實驗結果比較 96
6-3 流場模擬修改齒型與理論參數比較 98
6-4 流場模擬轉子壓縮加入機殼與水套 100
6-5 轉子壓力密封線 103
第七章 結論與未來展望 104
參考文獻 107

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