5-2 建議
複合式冷卻技術對於提升溫度場之熱傳分佈有很大的幫助,因此本文 除了使用肋條(Rib)之元件,建議再使用不同元件作組合,如:導氣葉片(NGV) 以及溝槽(Groove)等。流場幾何的改變,也會產生壓力損失,冷卻通道內 若壓力損失過大,將影響冷卻通道內熱傳分布情形,因此測量冷卻通道的 壓力差值,也是影響熱傳分佈重要參數之一,利用壓力差值以及紐賽數值 可計算出熱傳效益(Thermal performance)。
參考文獻
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圖 1-1:渦輪葉片內部冷卻通道示意圖
圖 2-1:RGB 色彩空間
圖片來源:(http://en.wikipedia.org/wiki/File:RGB_Cube_Show_lowgamma_cutout_a.png)
圖 2-2:HSV 色彩空間
圖片來源:(http://en.wikipedia.org/wiki/File:HSV_color_solid_cone_chroma_gray.png)
圖 2-3:三種液晶種類之結構排列方式
圖 2-5:冷卻通道旋轉示意圖
圖 3-1:感溫液晶顏色變化圖
圖片來源:(LCR Hallcrest)
圖 3-2:旋轉機構及其它設備
11. Frequency Controller 12. Balance Weight 13. Test Section 14. Light Source 15. CCD Camera 16. Function Generator 17. Slip-Ring
18. Computer
圖 3-3:實驗測試通道模型之尺寸大小
圖 3-4:實驗測試通道模型(平滑冷卻通道)
圖 3-5:實驗測試通道模型(置入肋條冷卻通道)
圖 3-6:肋條(Rib)幾何示意圖
圖 3-7:實驗模型整體架構圖
圖 4-1:液晶校正曲線(白平衡之差異)
圖 4-2:液晶校正曲線(閃頻頻率之差異)
圖 4-3:液晶校正曲線(偏差角度之差異)
圖 4-4:液晶校正曲線(占空比之差異)
圖 4-5:橫向紐賽數平均趨勢(時間秒數選取之差異)
圖 4-6:主流溫度與加熱時間關係圖
圖 4-7:時間步階與平均紐賽數關係圖
圖 4-8:平滑通道之平均紐賽數分布圖(雷諾數差異)
(a)
(b)
圖 4-9:平滑冷卻通道之紐賽數分布圖(靜止實驗) (a)Re=20000(Stationary)
(b)Re=25000(Stationary)
圖 4-10:平滑冷卻通道之平均紐賽數分布圖(旋轉實驗)
(a)
(b)
(c)
圖 4-11:平滑冷卻通道之紐賽數分布圖(旋轉實驗) (a)Re=20000(Stationary)
(b)Re=20000(Trailing) (c)Re=20000(Leading)
(a)
(b)
(c)
圖 4-12:平滑冷卻通道之紐賽數分布圖(旋轉實驗) (a)Re=25000(Stationary)
(b)Re=25000(Trailing) (c)Re=25000(Leading)
圖 4-13:置入肋條冷卻通道之平均紐賽數分布圖(靜止實驗)
圖 4-14:置入肋條冷卻通道之平均紐賽數分布圖(旋轉實驗)
圖 4-15:置入肋條冷卻通道之平均紐賽數分布圖(旋轉實驗)
圖 4-16:置入肋條冷卻通道之平均紐賽數分布圖(旋轉實驗)
(a)
(b)
(c)
圖 4-17:肋條壁面冷卻通道之紐賽數分布圖(靜止實驗) (a)Re=15000(Stationary)
(b)Re=20000(Stationary) (c)Re=25000(Stationary)
(a)
(b)
(c)
圖 4-18:肋條冷卻通道之紐賽數分布圖(旋轉實驗) (a)Re=15000(Stationary)
(b)Re=15000(Trailing) (c)Re=15000(Leading)
(a)
(b)
(c)
圖 4-19:肋條冷卻通道之紐賽數分布圖(旋轉實驗) (a)Re=20000(Stationary)
(b)Re=20000(Trailing) (c)Re=20000(Leading)
(a)
(b)
(c)
圖 4-20:肋條冷卻通道之紐賽數分布圖(旋轉實驗) (a)Re=25000(Stationary)
(b)Re=25000(Trailing) (c)Re=25000(Leading)
圖 4-21:比較肋條壁面和平滑通道之平均紐賽數比值(靜止實驗)
圖 4-22:肋條壁面和平滑壁面之各區域平均紐賽數比值(靜止實驗)
(a)
(b)
圖 4-23:肋條壁面和平滑壁面冷卻通道之紐賽數分佈圖(靜止實驗) (a)Smooth Re=25000(Stationary)
(b) Rib Re=25000(Stationary)
(a)
(b)
圖 4-24:肋條壁面和平滑壁面冷卻通道之紐賽數分佈圖(靜止實驗) (a)Smooth Re=20000(Stationary)
(b) Rib Re=20000(Stationary)
(a)
(b)
(c)
圖 4-25:雷諾數對於冷卻通道各區域之平均紐賽數比值的影響 (a)第一通道區(First Passage)
(b)流體轉向區(Turn Region) (c)第二通道區(Second Passage)
圖 4-26:參考文獻比較平滑通道之平均紐賽數比值分佈圖(靜止實驗)
圖 4-27:參考文獻比較肋條壁面冷卻通道之紐賽數比值分佈圖(靜止)
圖 4-28:參考文獻比較肋條壁面冷卻通道之紐賽數比值分佈圖(旋轉)