臺灣博碩士論文加值系統

本實驗是燃氣輪機葉片內部冷卻之二通路熱傳與壓降分析。實驗控制參數有：雷諾數為5000, 10000, 15000, 20000, 25000,轉數為0~800rpm, 壁邊條件為等溫狀況及不等熱通量, 阻塊高度與水力直徑比為0.27, 阻塊間距與阻塊高度比為8, 展弦比為3。研究的主要目的為(一)觀察強制對流、科氏力及離心力, 對於旋轉粗糙通道在不同的加熱條件下, 造成通道區及彎道區所產 生的熱傳影響。(二)對於五種不同壁邊條件, 所產生的壓降分佈, 做深入的探討。

This study deals with the heat transfer and pressure drop. Characteristics in rotating two-pass ribbed rectangular channel related to the internal cooling of turbine blades. The influence of rotating and uneven heating condition on the local heat transfer coefficient and pressure drop in a rotating, two pass rib-roughened rectangular channel with a cross-section aspect ratio 3 were studied for Reynolds number from 5000 to 25000 and rotating number from 0 to 0.2404.

目錄.....................................................................................................I
表目錄................................................................................................IV
圖目錄................................................................................................V
論文摘要(中文)................................................................................IX
論文摘要(英文)................................................................................X
符號說明............................................................................................XI
第一章 緒論.......................................................................................1
1-1 前言...............................................................................................1
1-2 背景與目的..................................................................................1
1-3 文獻回顧......................................................................................3
1-4 研究範圍......................................................................................6
第二章 實驗設備..............................................................................10
2-1 旋轉測試系統.............................................................................10
2-2 流體供應及控制裝置................................................................11
2-3 加熱及溫度控制系統................................................................11
2-4 溫度量測系統.............................................................................12
2-5 壓力量測系統及裝置................................................................12
第三章 實驗量測方法及步驟........................................................17
3-1 流量量測......................................................................................17
3-2 熱傳係數量測.............................................................................18
3-3 壓力差量測..................................................................................18
3-4 實驗步驟......................................................................................20
第四章 結果與討論..........................................................................24
4-1 實驗設備的正確性.....................................................................24
4-2 旋轉與不均勻加熱之效應........................................................24
4-3 展弦比與阻塊排列之效應........................................................26
4-4 旋轉數與紐塞數之關係............................................................26
4-5 旋轉數及不均勻熱通量對通道局部位置之效應.................27
4-6 離心浮力與不均勻熱通量之效應...........................................27
4-7 五種不同熱通量的靜壓量測結果...........................................28
4-8 旋轉對壓降產生之效應............................................................28
第五章 結論與建議..........................................................................59
5-1 結論...............................................................................................59
5-2 建議...............................................................................................59
參考文獻.............................................................................................61
附錄:誤差分析...................................................................................68

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