本實驗利用兩組應變規擷取系統所組成的受力量測系統，探討單
一圓柱於橫流中所受的升力、阻力，主要是針對圓柱後尾流場作出動
量注入的干擾，觀測在不同開口角度及不同注入量的干擾之下，圓柱
所受的升力及阻力的變化大小與阻力及升力隨時間的關係。實驗結果
可以發現，動量注入於圓柱後尾流場，確實能夠降低圓柱所受的阻
力，但隨著雷諾數的昇高，動量注入的大小也跟著提升，才能繼續維
持動量干擾的效用，但動量注入也會隨著角度的增加，而減少對阻力
的影響，使得升力也會隨角度的增加，而有明顯的變化。

The fluid forces on a single cylinder in cross flow are measured experimentally by strain gauges. The drag and lift coefficients of the cylinder are measured with momentum injection of various direction and magnitude. The results show that the drag coefficient of the cylinder is reduced with momentum injection. For higher Reynolds numbers, the
magnitude of momentum injection must be increased to maintain the effectiveness of momentum injection. The influence of the drag coefficient is reduced when the angle of momentum injection is increased, and then the lift coefficient is varied obviously.

目錄
論文摘要(中文) -------------------------------------------Ⅰ
論文摘要(英文) -------------------------------------------Ⅱ
目錄 -----------------------------------------------------Ⅲ
圖目錄 ---------------------------------------------------Ⅴ
符號說明 -------------------------------------------------Ⅶ
第一章 序論 -----------------------------------------------1
1.1 前言 --------------------------------------------------1
1.2 文獻回顧 ----------------------------------------------2
1.3 研究動機 ----------------------------------------------4
第二章 實驗儀器設備與方法 ---------------------------------5
2.1 實驗設備 ----------------------------------------------5
2.1.1 水循環系統 ------------------------------------------5
2.1.2 圓柱及支架 ------------------------------------------6
2.1.3 動量注入系統 ----------------------------------------7
2.1.4 應變規及電壓擷取系統 --------------------------------7
2.2 實驗步驟 ----------------------------------------------8
2.3 數據分析 ---------------------------------------------10
2.4 實驗精準度 -------------------------------------------11
第三章 結果與討論 ----------------------------------------13
3.1 動量注入對阻力、升力的影響 ---------------------------13
3.1.1 零度角動量干擾 -------------------------------------13
3.1.2 45 度角動量干擾 ------------------------------------15
3.1.3 60 度角動量干擾 ------------------------------------16
3.1.4 90 度角動量干擾 ------------------------------------17
3.2 不同角度對阻力、升力的影響 ---------------------------19
3.3 阻力與升力隨時間的弦波關係 ---------------------------20
第四章 結論與建議 ----------------------------------------23
4.1 結論 -------------------------------------------------23
4.2 建議 -------------------------------------------------24
參考文獻 -------------------------------------------------25

參考文獻

1.Carberry,J., Sheridan,J. and Rockwell,D., Forces and Modes of an Oscillating Cylinder, Journal of Fluids and Structures, vol. 15, pp.523-532, 2001.
2.Dunham,J., A Theory of Circulation Control by Slot-blowing, Applied to a Circular Cylinder, Journal of Fluid Mechanics, vol. 33, part 3, pp.495-514, 1968.
3.Gunzburger, M. D. and Lee, H. C., “Feedback Control of Karman Vortex Shedding, ”, Journal of applied mechanics, Transactions of the ASME, Vol.63, pp.828-835, 1996.
4.Hover,F. S., Tvedt,H. and Triantafyllou,M. S., Vortex-Induced Vibrations of a Cylinder with Tripping Wires, J. Fluid Mech., vol. 448, pp.175-195, 2001.
5.Karman,T. Von, Uber den Mechanismuss des Windersstandes den ein bewegter Korper in einen Flussigkeit Erfahart, Nachrichten der K. Gesellschaft der Wissenschaften zu Gottingen, pp.547-556, 1912.
6.Kim,S. J., Lee,C. M., Control of Flows around a Circular Cylinder : Suppression of Oscillatory Lift Force, Fluid Dynamics Research, vol. 29, pp.47-63, 2001.
7.Kwon,T. S., Sung,H. J., and Hyun,J. M., Experimental Investigation of Uniform-Shear Flow Past a Circular Cylinder, Journal of Fluids Engineering, vol.114, pp.457-460, 1992.
8.Lin,J. C., Towfighi,J. and Rockwell,D., Near-wake of a Circular Cylinder: Control by Steady and Unsteady Surface Injection, Journal of Fluids and Structures, vol. 9, pp.659-669, 1995.
9.Lin,J. C., Yang,Y., and Rockwell,D., Flow Past Two Cylinders in Tandem: Instantaneous and Averaged Flow Structure, Journal of Fluids and Structures, 16(8), pp.1059-1071, 2002.
10.Lam,K. and Fang,X., The Effect of Interference of Four Equispaced Cylinders in Cross Flow on Pressure and Force Coefficients, Journal of Fluids and Structures, vol. 9, pp.195-214, 1995.
11.Lam,K., Li,J. Y. and So,R. M. C., Force Coefficients and Strouhal Numbers of Four Cylinders in Cross Flow, Journal of Fluids and Structures, vol. 18, pp.305-324, 2003.
12.Mathelin,L., Bataille,F. and Lallemand,A., The Effect of Uniform Blowing on the Flow Past a Circular Cylinder, Journal of Fluids Engineering, vol. 124, pp.452-464, 2002.
13.Mathelin,L., Bataille,F. and Lallemand,A., Near Wake of a Circular Cylinder Submitted to Blowing – II Impact on the Dynamics, International Journal of Heat and Mass Transfer, 44, pp.3709-3719, 2001.
14.Morkovin. M. V. Flow Around Circular Cylinders, a Kaleidoscope of Challenging Fluid Phenomena. In ASME Symposium on Fully Separated Flows. pp. 102-118, ASME, 1964.
15.Munshi,S. R., Modi,V. J. and Yokomizo,T., Aerodynamics and dynamics of rectangular prisms with momentum injection, Journal of Fluids and Structures, vol. 11, pp.873-892, 1997.
16.Munshi,S. R., Modi,V. J., and Yokomizo,T., Drag Reduction and Vibration Control of a Spar-Type Cylindrical Structure through Boundary-Layer Control, Proceedings of the 1998 8th International Offshore and Polar Engineering Conference, Part 3 (of 4) May 24-29 , vol.3, 1998 Montreal, pp.415-423, 1998.
17.Strouhal,V., Uber enie Besondere Art der Tonerregung, Annalen der Physik und Chemie(Leipzig), pp.217-251, 1878.
18.Sundar,V., Vengatesan,V., Anandkumar,G., and Schlenkhoff,A., Hydrodynamic Coefficients for Inclined Cylinder, Ocean Engineering, vol. 25, pp.277-294, 1998.
19.Tang,S., Suppression of Vortex Shedding Inspired by a Low- Dimensional Model, Journal of Fluids and Structures, vol.14, pp.443-468, 2000.
20.邵家齊,“橫流場中圓柱受表面動量注入干擾下之受力量測”, 國立中山大學機械與機電工程研究所碩士論文,2004.