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研究生:詹智偉
研究生(外文):Chih-Wei Chan
論文名稱:圓柱於橫流中之流體彈性振動數值模擬
論文名稱(外文):Numerical study of fluid elastic vibration of a circular cylinder in cross flow
指導教授:游明輝
指導教授(外文):Ming-Huei 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:2004
畢業學年度:92
語文別:中文
論文頁數:81
中文關鍵詞:剪流場流體彈性不穩定渦漩剝離
外文關鍵詞:fluid elastic instabilitiesvortex sheddingshear flow
相關次數:
  • 被引用被引用:1
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本文主要是以數值模擬方法探討在流場形式不同下對圓柱的影響,並從渦漩剝離與流體彈性不穩定兩方面來做分析。首先在渦漩剝離方面,改變圓柱開口角度與動量干擾形式,觀察對圓柱後尾流渦漩的影響,並藉由商用軟體STAR-CD之便,取出升力係數與阻力係數值;另一方面,模擬單一圓柱在剪流場中,計算整理得出不同shear parameter與雷諾數下阻力係數與升力係數的資料庫,將其用來估計圓柱在不同位置上所受的力,並且分析出圓柱在流體彈性不穩定之因素影響下,剪流場的shear parameter,與當時mass ratio和damping factor分別對圓柱的擺盪振幅與運動軌跡的關係。
In the study, we confer with the effect of the circular cylinder for various flow fields, and investigate the phenomenon of the vortex shedding and fluid elastic instabilities. First, in the aspect of the vortex shedding, we observe the wake behind the cylinder after varying the locations of orifices on the cylinder and the forms of momentum addition, and the variation of the lift and drag coefficient can be obtained by using the commercial software STAR-CD. In the further study, we make the type of flow field to be a shear flow and build the database of the aerodynamic coefficients in different shear parameter and Reynolds numbers; furthermore, the database is an important basis for us to conjecture the surface force on the cylinder, and analyze the size of oscillations and the orbit that is caused by the shear parameter, mass ratio and damping factor respectively.
論文摘要(中文) -------------------------------------- Ⅰ
論文摘要(英文) -------------------------------------- Ⅱ
目錄 --------------------------------------------------- Ⅲ
表目錄 -------------------------------------------------- Ⅴ
圖目錄 -------------------------------------------------- Ⅵ
符號說明 ------------------------------------------------ Ⅸ

第一章 緒論 -------------------------------------------- 1
1.1 前言 ----------------------------------------------- 1
1.2 文獻回顧 ------------------------------------------- 2
1.3研究動機與預期目標-------------------------------- 6
第二章 理論分析 ----------------------------------- 7
2.1 模型建立 -------------------------------------------- 7
2.2 基本假設 -------------------------------------------- 7
2.3 統御方程式與邊界條件 -------------------------------- 8
2.4 模擬方向與參數設定----------------------------------- 9
2.5 格點獨立驗證與數值模擬正確性----------------------- 13
第三章 計算分析 ----------------------------------------- 15
3.1 商用軟體簡介 ---------------------------------------- 15
3.2 數值方法 -------------------------------------------- 16
第四章 數值模擬結果------------------------------------- 20
4.1 圓柱在均勻流場的尾流控制-----------------------------20
4.1.1圓柱上注入/吸出動量對CD、CL的影響----------------- 20
4.1.2圓柱開口角度對CD、CL的影響------------------------- 22
4.1.3週期性動量注入/吸出-------------------------------- 23
4.2 圓柱在剪切流場的不穩定--------------------------------25
4.2.1 shear flow 的斜率與CD、CL的影響---------------------25
4.2.2 圓柱受剪流場影響之運動軌跡-------------------------26
第五章 結論與建議-----------------------------------------30
5.1 結論--------------------------------------------------30
5.2 建議--------------------------------------------------32
參考文獻 -------------------------------------------------33
附錄 ---------------------------------------------------- 79
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2.Bruce R. Munson, Donald F. Young and Theodore H. Okiishi,1998,” Fundamentals of Fluid Mechanics ”, Third Edition, John Wiley & Sons.
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9.Munshi,S.R., Modi,V.J. and Yokomizo,T., 1996, “Effect of Momentum Injection on the Drag Reduction and Flow-Induced Instabilities of a Square Prism,” International Journal of Offshore and Polar Engineering, Vol.6, No.3, pp.161-170.
10.Sahjendra N. Singh, James H. Myatt, Gregory A. Addington, Siva Banda, and James K. Hall, 2001, “Optimal Feedback Control of Vortex Shedding Using Proper Orthogonal Decomposition Models,” Journal of Fluids Engineering, Transactions of the ASME, Vol.123, pp.612-618.
11.Tae soon Kwon, Hyung Jin Sung and Jae Min Hyun, 1992, “Experimental Investigation of Uniform Shear Flow Past a Circular Cylinder,” Journal of fluid engineering
12.Tang,S., 2000, “Suppression of Vortex Shedding Inspired by a Low-Dimensional Model,” Journal of Fluids and Structures, Vol.14, pp.443-468.
13.Von Karman,T., 1912, “Uber den Mechanismuss des Windersstandes den ein bewegter Korper in einen Flussigkeit Erfahart,” Nachrichten der K. Gesellschaft der Wissenschaften zu Gottingen, pp.547-556.
14.Yannick Delaunay and Lambros Kaiktisis, Control of Cylinder Wakes Using Base MassTranspiration, Physics of Fluids, Vol.13, pp.3285-3302, 2001
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