研究生: |
林克承 Ke-Tseng Lin |
---|---|
論文名稱: |
大型卡布蘭式水輪機流場數值模擬 Numerical study of flow in large Kaplan turbines |
指導教授: |
陳明志
Ming-Jyh Chern |
口試委員: |
牛仰堯
Yang-Yao Niu 王謹誠 Chin-Cheng Wang 曾修暘 Hsiu-Yang Tseng |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2022 |
畢業學年度: | 110 |
語文別: | 中文 |
論文頁數: | 82 |
中文關鍵詞: | 卡布蘭式水輪機 、協聯關係曲線 、真機試驗 、計算流體力學 |
外文關鍵詞: | Kaplan turbine, relation curve, real machine test, computational fluid dynamics |
相關次數: | 點閱:247 下載:2 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本文以台灣電力公司桂山發電廠粗坑機組豎軸卡布蘭式水輪機為研究對象,一方面利用真機試驗詳細分析現場實測出力數據,另一方面透過CFD數值方法針對真機試驗中多種不同導翼與動輪翼開度運轉狀況進行流場計算,分析各個過流部件流動特性,並與真機的試驗出力結果相比較。藉由真機試驗實測數據提出優化之導翼與動輪翼開度之協聯關係曲線可有效提高該水輪機發電出力。另試驗結果表明,機組於低載時勵磁機軸向振動值異常係由勵磁機機殼基座本身自然頻率所激起共振所引起。
與真機試驗相比,計算流體力學數值模擬在成本及訊息量有巨大之優勢,利用此法可對於大型水輪機過流部件全流道的物理特性更透徹了解。本文透過同真機試驗中不同導翼與動輪翼開度的運轉狀況下進行數值模擬全面地分析了各過流部件內的流動特性與其能量特性。
In this paper, the vertical Kaplan turbine of the Chun-Ken unit of the Gui-shan Power Plant of Taiwan Power Company is used as the research object. The real machine test is used to analyze the actual measured output data in detail. On the other hand, the flow field calculation is carried out for a variety of different wicket gates and runner blades opening operation conditions in the real machine test using CFD approach.
By proposing the optimization of relation curve between wicket gates and runner blades through the measured data of the real machine test, the power output of the turbine can be effectively improved. Another test result shows that the abnormal axial vibration of the excitor at low load is caused by resonance induced by the natural frequency of the base of the excitor casing itself.
CFD simulation has great advantages in cost and information content comparing with the real machine test. It makes the flow characteristics in large-scale turbines clear increasingly. This CFD approach numerically simulated the prototype’s flow field with respect to different openings of wicket gates and runner blades operating conditions using Fluent software and generally analyzed the flow and energy performance in all passing components.
[1] FLUENT Theory Documentation, Version 6.0, 2002
[2] Versteeg,H K,Malalasekera,W.An Introduction to Computational Flu-id Dynamics:
The Finite Volume Method. London: Longman Group Ltd,1995
[3] Patankar,S.V.,and Spalding,D.B.“A Calculation Procedure for Heat Mass and
Momentum Transfer in Three-Dimensional Parabolic Flows”International Journal of
Heat Mass Transfer,Vol.15,pp.1787-1806.1972.
[4] Sorenson, R.L.,McCann,K. A Method for Interactive Specification of Multiple
Block Topologies. AIAA 91,0147
[5] 台灣電力公司粗坑機組竣工報告資料.1992年
[6] 桂山電廠粗坑#3機振動測試,台灣電力公司電力修護處工作報告.2021年
[7] 大甲溪發電廠青山分廠復建計畫(7)地下廠房及電廠機械設備佈置,中興工
程顧問股份有限公司.2011年