臺灣博碩士論文加值系統

渦輪機裡葉片非定常受力的情形，主要來自於勢流效應（potential interaction）與渦流效應（vortical interaction）的交互作用。勢流效應造成的原因，主要乃是定子與轉子之間相對運動的關係，使得葉片壓力場的分佈產生了移動的現象，此種壓力分佈移動的現象無論在定子葉片上或轉子葉片上均可感受的到。而渦流效應的產生乃是葉片表面的邊界層所生成的尾流向下游傳遞的結果。當轉子的尾流向下游傳遞時，定子葉片會切截過此一尾流區，造成葉片表面上壓力的改變，由於尾流只會向下游傳遞且不易散去，所以渦流效應的範圍變得很廣泛。為了對壓縮機內非定常流場之轉子尾流做有效的控制，吾人發展出噴氣轉子葉片，並藉由轉子噴氣葉片的設置，來調整下游渦流效應對定子葉片非定常受力的影響，以期降低渦流效應對定子葉片的非定常受力。

Flow disturbance in the vicinity of an axial compressor blade can be considered due to vortical and potential effects.To reduced the unsteady force on stators,the rotor air blowing would be a good way to reduce the vortical effect.Thus it is important to understand the relations between air blowing and the reduced force on blade.

1-1研究背景與動機…………………………………………………….1
1-2文獻回顧…………………………………………………………….2
1-3研究目標…………………………………………………………….4
1-4論文簡介…………………………………………………………….4
第二章 實驗設備與量測方法
2-1軸流式壓縮機研究設備 ………………………………….………6
2-2噴氣葉片之設計與製作 ………………………………………….7
2-3量測儀器介紹……………………………………………………..10
2-4壓力量測系統……………………………………………………..12
2-4-1 壓力量測系統的組織架構………………………………….12
2-4-2 壓力感測器之設置………………………………………..12
2-4-3 壓力感測器之校正………………………………………..13
2-5實驗量測的方法…………………………………………………..15
2-5-1壓力昇與流量之量測……………………………………..15
2-5-2實際流場中葉片非定常壓力之量測………………………16
2-5-3葉片噴氣動量係數Km之訂定 …………………………..16
2-6實驗量測介紹 ……………………………………………………17
第三章 實驗訊號分析
3-1訊號擷取方式……………………………………………………20
3-2 訊號擷取在程式上的設定 ………………………………….…20
3-3 訊號週期平均法(ensemble average)…………………………21
3-4 葉片非定常受力之計算及無因次化參數 …………………….22
3-4-1葉片表面壓力分布與時間變化之關係 …………..………22
3-4-2 葉片非定常受力之計算方式 ….………………..……….22
l 三次雲弧內插法 ……………………….…………..…...22
l 葉片表面壓力對面積之積分 ………………………..…23
3-4-3無因次化參數之訂定………………………………….…..24
第四章 實驗結果及討論
4-1近尾流流場軸向速度之量測(0.15C、0.3C)…………….…….25
4-2轉子/定子 葉片非定常壓力之量測……………………………25
4-3轉子/定子 葉片非定常受力之量測……………………………28
第五章 總結
5-1結論………………………………………………………………31
5-2未來展望 ……………………………..………………………....32
參考文獻 …………………………………………………………..33
附錄 ……………………………………………………………..….35
圖 …………………………………………………………………....40

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