跳到主要內容

臺灣博碩士論文加值系統

(18.97.9.172) 您好!臺灣時間:2025/02/10 11:50
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

我願授權國圖
: 
twitterline
研究生:杜文允
研究生(外文):Wen-Yun Tu
論文名稱:冷卻圓柱尾流特性之有效雷諾數研究
論文名稱(外文):A Study on Effective Reynolds Number by using the Wake Characteristics of a Cooled Circular Cylinder
指導教授:王安邦王安邦引用關係
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:應用力學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:中文
論文頁數:59
中文關鍵詞:冷卻圓柱圓柱尾流渦旋剝離有效雷諾數有效溫度
外文關鍵詞:cooled circular cylindercylinder wake flowvortex sheddingeffective Reynolds numbereffective temperature
相關次數:
  • 被引用被引用:0
  • 點閱點閱:302
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本文針對恆溫冷卻圓柱尾流在高溫層流之實驗,研究圓柱表面溫度與自由流溫度比小於1 (T*< 1)時,溫度效應對圓柱尾流渦旋剝離之影響。自Lecordier et al.(1991) 提出有效雷諾數概念至今,已有許多加熱圓柱方面的實驗(T*> 1),然而卻從未有加熱流場冷卻圓柱方面的實驗,圓柱尾流的熱效應經本文完成0.67<T*<1的實驗後,有效雷諾數與有效溫度在低雷諾數時完全可由實驗證實,Wang et al.(2000)之泛用史卓荷數-雷諾數曲線在實際應用上比等溫情況更有價值。另一方面也證實了有效雷諾數概念跟熱傳方向無關;冷卻圓柱使尾流不穩,與加熱圓柱可使尾流穩定之熱效應一致。
The paper deals with a non-isothermal case T*<1 of an airflow around circular cylinder in cross flow at the regime of laminar vortex shedding. Lecordier et al.(1991) originally proposed the effective Reynolds number and effective temperature concept. Wang et al. (2000) derived Teff from experiments proposed c=0.28 and St-Reeff curve for T* between 1 to 2. The thesis confirm that Wang et al.(2000) effective temperature and St-Reeff curve for T*<1.
This thermal effect is consistent with known effect of flow stabilization by cylinder heating.
目錄


中文摘要 i
英文摘要 ii
目錄 iii
圖目錄 v
符號說明 vii

第一章 緒論 1
1.1 前言 1
1.2 研究動機 2
1.3 文獻回顧 3
1.3.1層流區之史卓荷數-雷諾數關係 3
1.3.2有效雷諾數概念與有效溫度概念 5
1.3.3高溫層流內恆溫冷卻圓柱尾流特性之定性分析 6

第二章 實驗儀器設備及方法 8
2.1 風洞設備 8
2.2 實驗模型 12
2.3 煙線流場顯影 14
2.4 溫度量測設備 14
2.5 熱線測速儀 15
2.6 雷射都卜勒測速儀 15

第三章 結果與討論 18
3.1可加熱直立式風洞測試區流場與溫度場量測分析 18
3.1.1 風扇變頻器與測試區自由流流速關係 18
3.1.2 未加熱流場量測分析 20
3.1.3 加熱流場及溫度場量測分析 25
3.2加熱流場冷卻圓柱溫度量測分析 30
3.2.1 加熱流場冷卻圓柱之熱傳分析 30
3.2.2 加熱流場冷卻圓柱溫度均勻性與穩定性量測 34
3.3流場與圓柱等溫情形尾流之史卓荷數-雷諾數關係 42
3.4高溫層流內恆溫冷卻圓柱尾流之史卓荷數-雷諾數數關係 48
3.5泛用史卓荷數-雷諾數關係 51

第四章 結論與建議 54
4.1 結論 54
4.2 建議 55

參考文獻 56
DUMOUCHEL, F., LECORDIER, J.C. & PARANTHOËN, P. 1998 The effective Reynolds number of a heated cylinder. Int. J. Heat Mass Transfer. 41 12, 1787-1794.
DURST, F., MELLING, A. & WHITELAW, J.H. 1981 Principles and practice of laser-Doppler anemometry 2nd ed. Academic Press.
EISENLOHR, H. & ECKELMANN, H. 1989 Vortex splitting and its consequence in the vortex street wake of cylinders at low Reynolds number. Phys. Fluids A 1, 189.
EISENLOHR, H. & ECKELMANN, H. 1993 Flow around finite lengthed cylinders at low Reynolds number: End effects and their origins. Notes on Numerical Fluid Mechanics, Volume 40, Vieweg, 208-215
FAND, R.M., KESWANI, K.K. 1973 Combined natural and forced convection heat transfer from horizontal cylinders to water. Int. J. Heat Mass Transfer 16, 1175-1191
FEY, U., KÖNIG, M. & ECKELMANN, H. 1998 A new Storuhal–Reynolds number relationship for the circular cylinder in the range 47 < Re < 2´105. Phys. Fluids 10, 1547.
GERICH, D. & ECKELMANN, H. 1982 Influence of end plated and free ends on the shedding frequency of circular cylinders. J. Fluid Mech. 122, 109.
GOLDSTEIN, R.J. & CHO, H.H. 1995 A review of mass transfer measurements using naphtalanen sublimation. Exp. Therm. Fluid Sci. 10, 416.
HAMMACHE, M. & GHARIB, M. 1989 A novel method to promote parallel vortex shedding in the wake of circular cylinders. Phys. Fluids A 1(10), 1611-1614.
HAMMACHE, M. & GHARIB, M. 1991 An experimental study of the parallel and oblique vortex shedding from circular cylinder. J. Fluid Mech. 232, 567.
HATTON, A.P., JAMES, D.D. & SWIRE, H.W. 1970 Combined forced and natural convection with low-speed air flow over horizontal cylinders. J. Fluid Mech. 42, 17.
HILPERT, R. 1933 Forsch. Geb. Ingenieurwes., 4, 215
KÖNIG, M., EISENLOHR, H. & ECKELMANN, H. 1990 The fine structure in the Strouhal–Reynolds number relationship of the laminar wake of a circular cylinders. Phys. Fluids A, Vol. 2, pp.1607-1614.
LEE, T. & BUDWIGB, R. 1991 A study of the effect of aspect ratio on vortex shedding behind circular cylinders, Phys. Fluids A3(2), 309-315.
LECORDIER, J.C., HAMMA, L. & PARANTHÖEN, P. 1991 The control of vortex shedding behind heated circular cylinders at low Reynolds numbers. Exp. Fluids 10, 224-229.
LECORDIER, J.C., DUMOUCHEL, F. & PARANTHÖEN, P. 1999 Heat transfer in a Bénard-Kármán vortex street in air and in water. Int. J. Heat Mass Transfer 42, 3131-3136.
LECORDIER, J.C., BROWNE, L.W.B., LE MASSON, S., DUMOUCHEL, F. & PARANTHOËN, P. 2000 Control of vortex shedding by thermal effect at low Reynolds numbers. Experimental Thermal and Fluid Science 21, 227-237.
LEWEKE, T., PROVANSAL, M. 1995 The flow behind rings: bluff body wakes without end effects. J. Fluid Mech. 288, 265.
MORGAN, V.T. 1975 The overall convective heat transfer from smooth circular cylinders. Adv. Heat Transfer 11, 199-263.
NORBERG, C. 1994 An experimental investigation of the flow around a circular cylinder: influence of aspect ratio. J. Fluid Mech. 258, 287.
PATNAIK, B.S.V., NARAYANA, P.A.A. & SEETHARAMU, K.N. 1999 Numerical simulation of vortex shedding past a circular cylinder under the influence of buoyancy. Int. J. Heat Mass Transfer 42, 3495-3507.
ROSHKO, A. 1954 On the development of turbulent wakes from vortex streets. N.A.C.A. Rep. No. 1191.
TRITTON, D.J. 1959 Experiments on the flow past a circular cylinder at low Reynolds numbers. J. Fluid Mech. 6, 547.
TRÁVNÍČEK, Z. & WANG, A.-B.2001 On the linear heat transfer correlation of a heated circular cylinder in laminar cross flow by using a new representative temperature concept. Int. J. Heat Mass Transfer 44,4635 –4647.
TRÁVNÍČEK, Z., WANG, A.-B. & MARSIK F.2002 Flow Visualization of the laminar ortex shedding behind a cooled cylinder. ISEM C209.
WANG, A.-B., TRÁVNÍČEK, Z. & CHIA K.-C 2000 On the relationship of effective Reynolds number and Strouhal number for the laminar vortex shedding of a heated circular cylinder. Phys. Fluids 12(6), 1401-1401.
WILLIAMSON, C.H.K. 1988 The existence of two stages in the transition to three-dimensionality of a cylinder wake. Phys. Fluids 31(11), 3165.
WILLIAMSON, C.H.K. 1989 Oblique and parallel modes of vortex shedding in the wake of a circular cylinder at low Reynolds numbers. J. Fluid Mech. 206, 579-627.
WILLIAMSON, C.H.K. 1992 The natural and forced formation of spot-like ‘vortex dislocations’ in the transition of a wake. J. Fluid Mech. 243, 393-441.
WILLIAMSON, C.H.K. 1996a Vortex dynamics in the cylinder wake. Annu. Rev. Fluid Mech. 28, 477-539.
WILLIAMSON, C.H.K. 1996b Three-dimensional wake transition. J. Fluid Mech. 328, 345-407.
WILLIAMSON, C.H.K. 1996c Mode A secondary instability in wake transition. Phys. Fluids 8(6), 1680-1682.
WILLIAMSON, C.H.K. & BROWN, G.L. 1998 A series in to represent the Strouhal-Reynolds number relationship of the cylinder wake. Journal of Fluids and Structures 12, 1073-1085.
WU,M.H. 2004 Experimental and numerical study of the separation angle for flow around a circular cylinder at low Reynolds number. J. Fluid Mech. 515, 233-260.
YAHAGI, Y. 1998 Structure of two-dimensional vortex behind a highly heated cylinder. Trans. Jpn. Soc. Mech. Eng., Ser. B 64, 209.
ZDRAKOVICH, M.M. 1997 Flow around circular cylinders. Oxford University Press.
陳信賓,”低速低亂度閉迴路風洞之研製與測試” ,台灣大學應用力學研究所
碩士論文,1994
吳明勳,”加熱圓柱尾流在層流區與過度區特性之研究” ,台灣大學應用力學
研究所碩士論文,2001
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top