旋轉狀態下管道內流場量測難度甚高，其流場與壓力分佈之實驗數據十分稀少。現階段而言，旋轉渦輪動葉之內冷卻流道熱流特性探討以熱傳研究為主，並且尚未有文獻針對90度非接觸-接觸式(de-at)肋條配置於壁面加熱與空氣加熱下，探討其浮力相反效應所引起的流場與熱傳差異。
因此本文針對流場、壓力及熱傳進行實驗研究。在流場量測方面，應用雷射都普勒測速儀(LDV)量測90度非接觸-接觸式(冷流場)、45度非接觸-接觸式(冷流場)與90度接觸-接觸式(冷流場、空氣加熱以及壁面加熱)的流場。壓力量測方面，應用微差壓力計量測45°de-at肋條配置的壓力結果。此外，為了比較壁面加熱與空氣加熱之浮力效應所引起的熱傳與流場之差異，因此在熱傳量測方面，採用熱電耦量測90°at-at的壁面加熱之溫度場。其中測試段橫截面為方形，由一180度銳轉銜接一徑向外流與一徑向內流之直管，而旋轉軸與管道截面垂直方向之間的夾角為90度。肋條(ribs)被安置於測試段之迎風面(leading wall)和背風面(trailing wall)，且肋條的橫截面呈正方形。肋條高度與通道水力直徑比（H/DH）為0.136，肋條與壁面的間隙與肋條高度比（C/H）為0.38，肋條間距與肋條高度比（Pi/H）為10。流場雷諾數固定為1×104。溫度場的密度比(|△ρ/ρ|)為0.057。實驗測試之轉數為0、165、330、495、660 rev/min，其相對應之旋轉數(Ro)為0、0.05、0.10、0.15、0.20，本研究之最大旋轉數已達到實際渦輪機操作之最低旋轉數。
本文藉由實驗量測旋轉通道內主流流場、彎道二次流流場的向量分佈、V方向速度、紊流動能、壓損以及區域平均紐塞數(regional averaged Nusselt number)。由流場與壓損的結果發現45°de-at肋條配置相較於90°de-at肋條配置為最佳排列方式。另外藉由流場與區域平均紐塞數發現在本實驗條件下(Ro=0.15，|△ρ/ρ|＝0.057)，浮力相反效應在相等功率下的速度曲線其空氣加熱比壁面加熱高出5.8％(管道平均差異)的差異，因此導致兩者間產生了10％(管道平均差異)的熱傳差異。因此在本實驗參數範圍內的浮力強度太弱，並無明顯影響流場與熱傳結果。

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