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研究生:楊明潭
研究生(外文):Ming-Tang Yang
論文名稱:壓電致動式合成噴流研析
論文名稱(外文):Study of Piezoelectric-Actuated Synthetic Jet Flow
指導教授:楊安石楊安石引用關係
指導教授(外文):An-Shik Yang
學位類別:碩士
校院名稱:大葉大學
系所名稱:機械工程研究所碩士班
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:2007
畢業學年度:95
語文別:中文
論文頁數:30
中文關鍵詞:複合式噴流壓電致動器主動式氣流控制數值模擬
外文關鍵詞:Synthetic JetFlow Visualization system
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壓電致動合成噴流產生器(Piezoelectric-Actuated Sythetic Jet Generator)因具有質量輕、效率高,且構造簡單等優點,故常應用於主動式氣流控制。合成噴流的流場現象依特性不同可分為發展、充分發展以及消散等三個區域,噴流運作時從週遭吸入和噴出的空氣質量約略相同,故又稱為零質量氣流(Zero-Net -Mass-Flow),但流場仍維持正向動量。
本研究應用熱絲式流速計量測消散區速度分佈,與配合雷射螢光顆粒激發顯像(Laser-Particle image)方法以觀察合成噴流動態流動現象。理論分析係基於三維,暫態,可壓縮紊流之質量與動量守恆方程式並配合SIMPLEC數值方法以探討合成噴流行為特性,紊流效應將採用K-ε雙方程式紊流模式另設定移動邊界(Moving Boundary Conditions)以模擬壓電模片之高頻週期振動。
數值結果與實驗量測數據比對後,可驗證理論模型與計算軟體正確性,並延伸應用模擬程式於合成噴流參數分析。
Piezoelectric synthetic jet actuators have shown great potential in practical application as active flow control devices due to the advantages of light weight and high efficiency. During the operation, the synthetic jet flow has the cycle-averaged property of zero-net-mass-flux but nonzero momentum flux. The purpose of this study is to probe the compressible turbulent synthetic jet flow characteristics for a dual diaphragm piezoelectric actuator. In the experimental investigation, a flow visualization system was established to obtain the particle streak images with 10-μm red fluorescent spheres for the piezo-driven synthetic jet flowfield, produced by a dual-diaphragm piezoelectric actuator. In operation, the piezo diaphragms of the actuator were simultaneously driven by a sine waveform. A 5W argon-ion laser with a cylindrical lens was employed to illuminate the flowfield in the cross-sectional plane. The streakline scattered from the fluorescent particles was photographed using a charge-coupled device (CCD) camera. The centerline velocity of the synthetic jet was measured using a hot-wire anemometry system for the code validation. A computational approach also adopted the transient three-dimensional conservation equations of mass and momentum with the moving boundary specified to represent the piezo diaphragm motion. The k-ε two-equation turbulent model was used for turbulence closure. The particle streakline images in the cross-sectional plane at the resonant frequency of 648 Hz obviously visualized a fully-developed turbulent jet flow pattern in the far-field area. The close view photograph revealed the time-periodic formation and advection of discrete vortex pairs. The hot-wire anemometry results showed that the measured centerline velocity of the synthetic jet reached 3.8 m/s at y/d= 50. The numerical simulation indicated that the near-field flow tended to undergo transition to turbulence. In addition, the orifice fluid was entrained into the actuator cavity due to the outward movement of the piezo diaphragms when the vortex pairs were sufficiently distant away from the orifice.
封面內頁
簽名頁
授權書 iii
中文摘要 iv
ABSTRACT v
誌謝 vii
目 錄 viii
圖目錄 x
表目錄 xi

第一章 緒論 1
1.1 研究背景 1
1.2 文獻回顧 4
1.3 研究目的 5
第二章 理論與實驗研究方法 7
2.1 理論分析 7
2.2 數值方法 9
2.2.1 SIMPLEC演算法 11
2.3 雙膜式壓電致動器設計與製作 13
2.4 實驗設備架構 15
第三章 結果與討論 17
3.1 實驗驗證 17
第四章 結論 26
4.1 結論 26
4.2 未來發展 26
參考文獻 28
[1]J. E. Cater and J. Soria, “The evolution of round zero-net-mass-flux jets,”J. Fluid Mech. 472, 167 1997.
[2]B. L. Smith and A. Glezer, “The formation and evolution of synthetic jets,” Phys. Fluids 10, 2281 1998.
[3]Venkata Pavan K Madhira, “Interaction of Synthetic Jets with Boundary Layers,” Fluid Sciences, Department of Mechanical Engineering, UNM, Albuquerque, NM 87131, USA.
[4]Smith, B. L. and Glezer, A. “Vectoring and Small Scale Motions Effected in Free Shear Flows Using Synthetic Jet Actuators”, AIAA Paper 97-0213, 1997.
[5]Allen, M. G. and Glezer, A. “Jet Vectoring Using Zero Mass Flux Control Jets”, AFOSR Workshop at Wright Patterson AFB, 1995.
[6]Pack, L. G. and Seifert, A. “Periodic Excitation for Jet Vectoring and Enhanced Spreading”, AIAA Paper 99-0672, 1999.
[7]Smith, D. R., Kibens, V., Parekh, D. E. and Glezer, A. “Thrust Vectoring with Hybrid Synthetic Jet Actuator”, Proc. of the ASME Fluids Engineering Division Summer Meeting, Vancouver, B.C., 1997.
[8]Smith, B., L., Synthetic Jets and their Interaction with Adjacent Jets, PhD Thesis, Georgia Institute of Engineering, 143 pp., June 1999.
[9]Mallinson, S. G., J. A. Reizes, and G. Hong, “An Experimental and Numerical Study of Synthetic Jet Flow,” Aeronautical Journal, Vol. 105, No. 1043, pp. 41–49, January 2001.
[10]Rizzetta, D. P., M. R. Visbal, and M. J. Stanek, “Numerical Investigation of Synthetic Jet Flowfields,” AIAA Journal, Vol. 37, No. 8, pp. 919–927, August 1999.
[11]Lee, C. Y. and Goldstein, D. B. “Tow Dimensional Synthetic Jet Simulation,” AIAA Journal, Vol. 40, No. 3, pp. 510–516, March 2002.
[12]Mallinson, S. G., C. Y. Kwok, and J. A. Reizes, “Numerical Simulation of Micro-fabricated Zero Mass-flux Jet Actuators,” Sensors and Actuators A: Physical, Vol. 105, pp. 229–236, 2003.
[13]Wang, Y., “Microfluidic Technology for Integrated Thermal Management: Micromachined Synthetic Jet,” Ph. D. thesis, Georgia Inst. Technol., Atlanta, GA, November 2003.
[14]Coe, D. J. , “Fabrication Technology Approaches to Micromachined Synthetic Jets” ,Ph.D. Dissertation ,Georgia Institute of Technology,2002.
[15]Amitay, M., Honohan, A., Trautman, M., and Glezer, A., “Modification of the Aerodynamics Characteristics of Bluff Bodies,” AIAA Paper 97-2004, 1997.
[16]Roos, F. W., "Synthetic-Jet Microblowing for Forebody Flow-Asymmetry Management", AIAA Paper 98-0212, 1998.
[17]Crook, A., Sadri, A. M., and Wood, N. J., "The Development and Implementation of Synthetic Jets for the Control of Separated Flow", AIAA Paper 99-3176, 1999.
[18]Van Doormaal, J. P., and Raithby, G. D., “Enhancements of The SIMPLE Method for Predicting Incompressible Fluid Flows,” Numerical Heat Transfer, Vol. 7, 1984, pp. 147-163.
[19]Pilliod, J. E., and Puckett, E. G.. “Second Order Volume-of-Fluid Interface Tracking Algorithms.” Journal Computational Physics, Vol. 188, No. 1, 2003, pp.100-122.
[20]吳坤城, “改良式合成噴射氣流器有限元素模型的建立和實驗量測與驗證”, 大葉大學機械工程研究所碩士論文, 2002.
[21]陳華斌, “壓電噴射氣流器的設計與實驗評估”, 大葉大學機械工程研究所碩士論文, 2003.
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