渦輪機葉片內冷卻流道之熱傳增益因與葉片壽命息息相關而倍受重視，相關之研究文獻極多；但是文獻中絕大部分的管道都是採用矩形管道，而已被渦輪機廠商採用之平行四邊形管道則僅有少數之熱傳實驗量測，迄今為止並無相關平滑管道之流場與壓力分佈研究，因此本文使用質點影像測速儀(PIV)及壓力感測器量測急彎雙流道平行四邊形管道之速度場及壁面上靜壓分布。測試雷諾數固定為10,000，管道形狀為1：1正方形傾斜45度，水力直徑DH為32.17mm，管道長度為8.92DH，隔板寬度為0.625DH。實驗量測結果以通道內主流流場、彎道二次流流場的向量分布、紊流動能及壓損係數來分析與討論。結果發現本文之流場定量分析結果能合理的解釋前人所報導之平行四邊形雙通道熱傳分布趨勢，並確認出熱傳增益與對流熱傳、衝擊熱傳及紊流動能之間的相互關係，同時比較平行四邊形平滑管道與1：4、1：2、1：1及2：1矩形/正方形平滑管道在相同雷諾數下之熱傳係數分布，發現平行四邊形平滑管道之整體平均熱傳係數比矩形平滑管道提升1.29-1.62倍，而於定泵功率條件(Constant Pumping Power Condition)下，平行四邊形平滑管道所能提供之熱性能係數(Thermal Performance Factor)較矩形平滑管道高1.23-1.65倍，證明平形四邊形平滑管道有相當大之發展價值。

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