跳到主要內容

臺灣博碩士論文加值系統

(100.28.2.72) 您好!臺灣時間:2024/06/14 00:19
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:許家量
研究生(外文):Chia-liang Hsu
論文名稱:連續底定式透水結構物之流場分析
論文名稱(外文):The characteristics of flows passing porous ribs mounted on a channel bed
指導教授:呂珍謀呂珍謀引用關係
指導教授(外文):Jan-Mou Leu
學位類別:碩士
校院名稱:國立成功大學
系所名稱:水利及海洋工程學系碩博士班
學門:工程學門
學類:河海工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:61
中文關鍵詞:紊流透水結構物流速
外文關鍵詞:velocityTurbulencePorous
相關次數:
  • 被引用被引用:2
  • 點閱點閱:142
  • 評分評分:
  • 下載下載:21
  • 收藏至我的研究室書目清單書目收藏:0
本研究主要可以分成兩部份,首先水流以浸沒方式模擬洪水通過連續式透水結構物,探討平均流與紊流之特性,利用實驗室中15m×0.6m ×0.6m之循環渠道配合音波都普勒流速儀(acoustic Doppler Velo- cimeter,ADV)進行量測試驗,研究結果瞭解水流通過浸沒連續式透水結構物相應之流速、紊流強度、紊流動能及雷諾剪力分布情形;另一方面,本研究與Cui(2002)所做的連續式不透水結構物數值模擬結果比較,比較結果得知透水結構物後方的回流區只有一個,並無發現結構物前方的回流區與後方的角落渦流,且回流區大小較不透水結構物來得窄且短,發生位置也因通過結構物穿越流的影響出現在較下游處,底床剪應力亦由於回流區的不同,使得剪應力正負值不如不透水結構物轉換頻繁,呈現較為均勻的狀況。最後,本文利用分析結果提出本實驗成果在工程上的應用。
The purpose of this study can be divided into two parts. First, Water immerged situations are used to simulate the flood water through the Series porous structures. There is a circulated flume(15m × 0.6m × 0.6m) with acoustic Doppler Velocimeter (ADV) for measuring. Discussion on the averaged flow and turbulence characteristics is proposed here. This part is to understand the velocity, turbulence intensity, turbulent kinetic energy and Reynolds shear distributions related to the flood flow through the immerged Series porous structures. On the other hand, the present results are used to compare with the existing numerical results of series impermeable structures of Cui(2002). This comparison shows that the water behind the series porous structures have only one recirculation region, and there is no recirculation region in front of the structure and the corner eddy current, compared with the series impermeable structures. Location the recirculation is affected as a result of bleed flow to take place in a more downstream point, Bed shear stress is also due to the different recirculation region, so the shear stress is not as impermeable as so many positive and negative conversion., The present results of this experiment can be applied to engineering applications.
摘要............I
Abstract........II
誌謝...........III
目錄............IV
圖目錄..........VI
表目錄.........IX
照片目錄.........X
符號說明..........XI
第一章 緒論......................1
1-1 前言.........................1
1-2 水流通過透水結構物之型式.....2
1-3 前人研究.....................3
1-4 研究目的及方法...............7
1-5 本文架構 .................9
第二章 理論背景.................11
2-1 紊流強度與動能 ........11
2-2 ADV量測理論 ........13
2-3 福祿數與雷諾數之定義........15
2-3-1 雷諾數 ................15
2-3-2 福祿數 ................15
2-4 底床剪應力係數定義 ........15
第三章 實驗設備及實驗方法.......17
3-1 實驗設備 ................17
3-1-1 人工試驗玻璃渠道 ........17
3-1-2 實驗儀器設備 ........18
3-1-3 三角堰之率定 ........20
3-1-4 消除雜訊 ................21
3-2 實驗佈置 ................22
.3-3 預備實驗... ........22
3-4 實驗方法與步驟 ........22
3-4-1 實驗方法 ................22
3-4-2 實驗步驟 ................23
第四章 實驗結果分析及比較.......30
4-1 平均流速 ................30
4-1-1 縱向平均流速 ........30
4-1-2 垂向平均流速 ........31
4-2 紊流強度之分析 ........32
4-3 雷諾剪應力之分析 ........33
4-4 紊流動能之分析 ........34
4-5 連續式不透水結構物比較 34
4-5-1 迴流區比較 ........35
4-5-2 紊流強度比較 ........35
4-5-3 雷諾剪應力比較 ........36
4-5-4 底床剪應力係數比較 36
4-6 水工結構物上之應用 ........37
4-6-1 迴流區及再接觸點的位置 37
4-6-2 紊流動能的分佈 ........38
4-6-3 底床受到的剪力 ........38
第五章 結論與建議...............56
5-1 結論 ................56
5-2 建議 ................57
參考文獻 ................58
附錄A ........................60
1.中華水土保持學會規劃,「雲林縣大埔溪、大湖口溪上游集水區調查規劃報告」中華水土保持學會,1987。
2.林德貴,賴原崇,劉文宗,「河溪整治自然生態工法之設計與分析」,自然生態工法實務研討會,2002。
3.張書唐,「通過透水結構物急變明渠流場之試驗研究」,國立成功大學水利及海洋工程研究所碩士論文,2007。
4.黃偉哲,「水流通過透水式橋墩保護工之流況分析」國立成功大學水利及海洋工程研究碩士論文,2002。
5.楊志偉,「透水結構物附近及其內部流場特性分析」,國立成功大學水利及海洋工程研究所碩士論文,2006。
6.詹勳全,「水流通過多孔介質二維水理模式開發與應用」,國立成功大學水利及海洋工程研究博士論文,2006。
7.陳鴻鈞,「紊流透過多孔介質底床之完全發展分佈特性」,國立成功大學水利及海洋工程研究所碩士論文,2006。
8.Chan H. C. ,Y. Zhang, J. M. Leu and Y. S. Chen, “Numerical calculation of turbulent channel flow with porous ribs”, Journal of Mechanics, In press.
9.Chen X. and Y. M. Chiew, “Velocity Distribution of Turbulent Open-Channcel Flow with Bed Suction”, Journal of Hydraulic Engineering, Vol.130, No2, P.140-148, 2004.
10.Choi Y. and M. W. Peter, “Momentum transport mechanism for water flow over porous media”, Joumal of Environment Engineering, Vol.123 No.8, 792-799, 1997.
11.Cui J., V. C. Patel, C. L. Lin, “Large-eddy Simulation of Turbulent Flow in Channel with Rid Roughness”, International Journal of Heat and Fluid Flow, Vol.24, No.3, P.372-388, 2003.
12.Frederick W. B. and J. Davis, “Microflow Regimes and The Distribution of Macroinvertebrates around Stream Boulders”, Freshwater Biology, Vol.40, P.77-86, 1998.
13.Gao Y. and W. K. Chow, “Numerical studies on air flow around a cube”, J. Wind Engrg. Ind. Aerodynamics, Vol.93, No 2, P.115-135, 2005.
14.Hussein H. and R. Martinuzzi, “Energy balance for turbulent flow around a surface mounted cube placed in channel ”Phys Fluids, Vol.8, No.3, 764-780 1996.
15.Michioku K., S. Maeno, T. Furusawa,and M. Haneda, “Discharge through a Permeable Rubble Mound Weir”, Journal of Hydraulic Engineering, Vol.131, No.1,P.1-10, 2005.
16.Morris, H.M., “Flow in rough conduits”, ASCE Transactions, Vol.120, No.2745, P373-410, 1955.
17.Pang B., ”River Flood Flow and Its Energy Loss”, Journal of Hydraulic Engineering, Vol.124, No.2, P228-231, 1998.
18.Lee S. J. and C. W. Park, “Surface Pressure Characteristics on a Triangular Prism Located behind a Porous Fence”, Journal of Wind Engineering and Industrial Aerodynamics, Vol.80, P.69-83, 1999.
19.Lee S. J. and H. B. Kim, “Laboratory Measurements of Velocity and Turbulence Field behind Porous Fences”, Journal of wind Engineering and Industrial Aerodynamics, Vol.80, P311-326, 1999.
20.Lee S. J. and H. C. Lim, “A Numerical Study on Around a Triangular Prism Located behind a Porous Fence”, Fluid Dynamics Research, Vol.28, P.209-221, 2001.
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top