(3.236.231.14) 您好!臺灣時間:2021/04/15 06:37
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:許瑞呈
研究生(外文):Jui-chen Hsu
論文名稱:單一圓柱在超臨界剪切流場中的運動模擬
論文名稱(外文):Simulation of single circular cylinder in shear flow
指導教授:游明輝
指導教授(外文):Ming-Heui Yu
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
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:2008
畢業學年度:96
語文別:中文
論文頁數:79
中文關鍵詞:渦漩引致振動對比速度剪切流流體引致振動流體彈性振動
外文關鍵詞:Vortex-induced VibrationFlow-Induced Vibrationshear flowFluid elastic vibration
相關次數:
  • 被引用被引用:1
  • 點閱點閱:147
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本文主要利用數值方法探討圓柱於剪切流中流體-彈性不穩定(Fluid-Elastic Instibility)之運動行為,理論模型則係基於暫態之連續與動量守恆方程式,並利用計算流體力學軟體FLUENT模擬圓柱在剪切流場中的運動行為,分析結果顯示圓柱在剪切流場中,同時具有渦漩引致振動及流體-彈性振動的特性。使用諧振模型(Harmonic Model)研究結果顯示,圓柱表面受剪切流橫向力之影響而產生側向升力,進而形成週期性的振動。而後探討剪切流內圓柱流體-彈性振動之振幅-對比速度的趨勢關係與運動軌跡,並解析不同剪切流速度梯度、阻尼係數等結構參數之影響,本文亦藉由FLUENT的動網格即時顯示功能,觀察圓柱移動時,網格重建(Remesh)的情形。
The present study aims to explore dynamical behavior of the fluid-elastic instability of a circular cylinder in shear flow by numerical simulations. The theoretical model comprises two groups of transient conservation equations of mass and momentum and the governing equations are solved numerically with Fluent software to determine the flow property. The analysis presented that there exist both vortex-induced vibration and flow-elastic vibration for single cylinder in sear flow. The numerical results with a Harmonic Model built from Gambit indicate that there is a transverse force acting from high velocity side toward the low velocity side in shear flow. The transverse force make cylinder move periodically and thus go to a vibration. Furthermore, this study appraises the amplitude and orbit of fluid elastic vibration of a circular cylinder in shear flow and shows the effects of the shear velocity slope and damping factor on fluid elastic vibration of the cylinder.
Here in the thesis, as the function applied with Fluent of displaying dynamic mesh on-time, the movement and re-mesh of cylinder could be observed. A vibration expansion diagram was presented and the pictures of flow velocity and flow pressure were retrieved from Fluent.
第一章 緒論------------------------------------------------------------------1
1.1 研究動機-------------------------------------------------------1
1.2 文獻回顧-------------------------------------------------------2
1.3 研究目的-------------------------------------------------------4
第二章 研究模式分析------------------------------------------------------6
2.1 理論分析-------------------------------------------------------6
2.1.1 流體統御方程式-----------------------------------------7
2.1.2 圓柱運動方程式---------------------------------------8
2.1.3數值運算流程----------------------------------------10
2.2 數值參數設定--------------------------------------------13

第三章 結果與討論----------------------------------------------------15
3.1 網格解析與時間間距設定---------------------------------17
3.2 結果分析------------------------------------------------------19
3.3 圓柱於剪切流場中的運動模式探討---------------------21
3.3.1 對比速度與振幅變化------------------------------21
3.3.2 剪切流速度梯度與振幅變化-------------------22
3.3.3 阻尼與振幅變化----------------------------23
3.3.4 圓柱振動軌跡變化---------------------------24
3.3.5圓柱於剪切流場中承受流體作用力分析---25
第四章 結論--------------------------------------------------------------28
參考文獻-------------------------------------------------------------------31
[1]Blevins, R. D. “Flow-Induced Vibration” 2nd ed. Van Nostrand Reinhold, New York. 1990.
[2]Zukauskas, A., Ulinskas, R. and Katinas, V. “Fluid Dynamics and Flow-Induced Vibrations of tube banks”. Hemiphere Publishing Corporation. 1988.
[3]White, F. M. “Viscous Fluid Flow”. 2nd ed. McGraw-Hill, Inc. 1991.
[4]Munson, B. R., Young, D. F., and Okiishi, T. H. “Fundamentals of Fluid Mechanics”, 5th ed. John Wiley & Sons. 2006.
[5]Robert, W. F., McDonald, A. T., and Pritchard, P. J. “Introduction to Fluid Mechanics”, 6th ed. John Wiley&Sons. 2004.
[6]Çengel, Y. A. and Cimbala, J. M. “Fluid Mechanics”. McGraw-Hill, Boston, MA. 2006.
[7]Novak, M. ”Galloping and Vortex Induced Oscillation of Structures”. In proceedings of the 3rd International Conference on Wind Effects on Buildings and Structure. Tokyo. 1971.
[8]ASME SECTION III Division 1 Appendices N-1300. ”Flow-Induced Vibration of Tubes and Tube Banks”. The American Society of Mechanical Engineers. 1998.
[9]FLUENT 6.3 Documentation. “User’s Guide and UDF Manual”. Fluent Inc. 2006.
[10]Meriam, J. L. and Kraige, L. G. “Engineering Mechanics, Dynamic”, 5th ed. John Wiley & Sons. 2002.
[11]Richardson, A. S., Martucelli, J. R., and Price, W. S. “Research Study on Galloping of Electrical Power Transmission Lines” in Proceedings of the First International Conference on Wind Effects on Buildings and Structures, Vol. II, pp. 612-686. 1965.
[12]Parkinson, G. V. and Brooks, N. P. H. “On the Aeroelastic Instability of Bluff Cylinders“. Journal of Applied Mechanics, Vol. 28, pp.252-258. 1961.
[13]Nakamura, Y. and Mizota, T. “Torsional Flutter of Rectangular Cylinders”. Journal of the Engineer Mechanics Division, Vol. 101, pp.125-142. 1975.
[14]Connors, H. J. “FluidElastic Vibration of Tube Arrays Exited by Cross Flow”. Paper presented at the Symposium on Flow Induced Vibration in Heat Exchangers, ASME Winter Annual Meeting, Vol. 3. New York. 1970.
[15]Halle, H. and Lawrence, W. P. “Crossflow-Induced Vibration of a Row of Circular Cylinders in Water“. ASME Paper 77-JPGC-NE-4. The American Society of Mechanical Engineers. 1977.
[16]Mulchay, T. M., Halle, H., and Wambsganss, M. W. “Prediction of Tube Bundle Instability : Case Studies“. Argonne National Laboratory Report ANL-86-49. 1986.
[17]Paidoussis, M. P. “A review of Flow-Induced Vibration in Reactors and Reactor Components”. Nuclear Engineering and Design, Vol. 74. 1982.
[18]Paidoussis, M. P. “Flow-Induced Instability of Cylindrical Structures”. Applied Mechanic Reviews, Vol. 40. 1987.
[19]Paidoussis, M. P. and Price, S. J. “The Mechanisms Underlying Flow-Induced Instability of Cylinder Arrays in Cross Flow”. Journal of Fluid Mechanics, Vol. 187. 1988.
[20]Robert, B. W. ”Low Frequency, Aeroelastic Vibration in a Cascade of Circular Cylinders”. Mechanical Engineering Science Monograph No 4. 1966.
[21]Zdravkovich, M. M. ”Review of Flow Interference Between Two Circular Cylinders in various Arrangements”. Journal of Fluid Engineering Vol. 99. 1977.
[22]Zdravkovich, M. M. “Classification of Flow-Induced Oscillations of Two Parallel Circular Cylinders in Various Arrangements”. Symposium on Flow-Induced Vibrations, Vol. 2. New Orleans. 1984.
[23]Zdravkovich, M. M. ”Flow-Induced Oscillations of Two Interfering Circular Cylinders”. Journal of Sound and Vibration. 1985.
[24]“Standards of The Tubular Exchanger Manufacturers Association”, 7th ed. Tubular Exchanger Manufacturer Association, Inc. 1988.
[25]Bhaskaran, R. and Collins, L. “Introduction to CFD Basics”. 2003.
[26]“GAMBIT 2.3 User''s Guide”. Fluent Inc. 2006.
[27]Feng, C. C. “The Measurement of Vortex-Induced Effects in flow Past Stationary and Oscillating Circular and D-Section Cylinders,” M. A. Sc. Thesis, University of British Columbia. 1968.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔