未來工作與討論

1. 本實驗研究在加壓為錶壓四大氣壓時，觀察不同交錯排列之肋條於三角 形通道中的熱傳情形，因此後續可以安排在不同的加壓情況下，觀察熱 傳效率是否會因加壓的情形不同而有所改變。

2. 而實驗中的參數也不盡相同，此研究選取兩種雷諾數分別為 15000 以及 25000 的情形下去做比對，後續工作可以提高雷諾數，多增加幾種條件，

觀察雷諾數上升對熱傳效果影響之情形。

3. 對於旋轉數的限制，可以再做些設計上的改變去加以突破，本實驗分別

記錄六種轉速下，熱傳效率增益情形；其中取兩種轉速 130rpm 以及 230rpm 去做比較，觀察旋轉數提升對通道內之熱傳影響。

參考文獻

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圖 1-1 燃氣渦輪機噴射引擎示意圖

圖 1-2 加裝 45^。型式肋條的測詴部圖

圖 1-3 加裝 45^。間斷型式肋條的測詴部圖

圖 1-4(a) 渦輪葉片冷卻通道圖

圖 1-4(b) 渦輪葉片冷卻通道圖

圖 1-5 空氣流經 45^。肋條引發二次流示意圖

圖 1-6 空氣流經肋條以及旋轉造成二次流動示意圖

圖 3-1 實驗設備圖

圖 3-2 實驗流程圖

開啟空壓機

開啟直流電源供 應器

調整流量及壓力

調整電壓

持續觀察微調

電壓至穩態 穩態時擷取數據

使用 LabView

軟體

記錄電 壓、流量

及壓力

開啟馬達變頻器 靜止狀態

旋轉狀態

調整流量、壓力 及電壓

調整轉速

圖 3-3 測詴部配置圖

圖 3-4 通道尺寸示意圖

圖 3-5 流體流通方向示意圖

圖 3-7 肋條擺放形式示意圖

圖 3-8 實驗機台圖

圖 4-1 Wall Temperature Re=15k