進階搜尋


   電子論文尚未授權公開,紙本請查館藏目錄
(※如查詢不到或館藏狀況顯示「閉架不公開」,表示該本論文不在書庫,無法取用。)
系統識別號 U0026-2308202017460800
論文名稱(中文) 模型風機在週期性與震盪性入流之發電效率與尾流分析實驗研究
論文名稱(英文) Experimental investigation on power generation efficiency and wake characteristics of a model wind turbine under periodic and oscillatory inflow conditions
校院名稱 成功大學
系所名稱(中) 工程科學系
系所名稱(英) Department of Engineering Science
學年度 108
學期 2
出版年 109
研究生(中文) 黃佳敏
研究生(英文) Chia-Min Huang
學號 N96071415
學位類別 碩士
語文別 英文
論文頁數 58頁
口試委員 指導教授-吳毓庭
口試委員-林昭安
口試委員-朱佳仁
口試委員-李約亨
口試委員-林傳堯
中文關鍵字 週期性變化入流  功率係數  尾流測量  風洞實驗 
英文關鍵字 Periodic inflow  Power coefficient  Wake measurement  Wind-tunnel experiment 
學科別分類
中文摘要 此篇論文進行了風洞實驗量測的研究,研究目的為在不同的非穩態入流條件下,模型風力發電機的發電效率和尾流特性的分析比較。過去幾年在風洞實驗上,大多數學者使用不變的振盪入流條件,而本篇論文相較於以往不同,本實驗研究強調在有正弦波變化的入流速度條件下(例如:風速為5至8.2 m/s)的測量值(包括電流,葉片轉速和尾流的速度分量),估算了五個電阻,其電阻值分別為15、17.9、19.7、23.4和25.1歐姆下的功率係數,並且得到瞬時的最大機械功率係數為0.47。使用週期為30秒的正弦入流(週期性變化入流)的速度,量測電流,葉片轉速,葉片尖端速度比和功率係數變化分佈,發現電流和葉片轉速的變化幅度(也與葉片尖端速度比相關)隨電阻值的增加而減小,這項實驗結果表明當電阻值越大,入流速度變化對於風力發電機的運行影響較小。而關於尾流特性測量的結果歸納出二項重點。第一點為由於週期性變化入流的風速從上到下變化,其尾流的湍流強度(TI = 0.055)大於振盪性入流的湍流強度(TI = 0.025)。第二點為通過在±4波數處進行傅立葉轉換,其目的為了濾除每個測量點上120秒瞬時速度分量的週期性變化的入流特性,濾波後的尾流具有類似於振盪性入流條件下的特徵。
英文摘要 This study conducted wind tunnel experiments to study the power generation efficiency and wake characteristics of the model wind turbine under different unsteady inflow conditions. Unlike most previous wind tunnel experiments with non-varying oscillatory inflow conditions, this study emphasized measurements (including electrical current, blade rotating speed, and turbulent wake velocity components) under the inflow velocity with a sinusoidal variation (e.g., 5 to 8.2 m/s). The power coefficient under five resistances of 15, 17.9, 19.7, 23.4, and 25.1 ohms is estimated, with the instantaneous maximum mechanical power coefficient of 0.47. The electrical current, blade rotating speed, tip speed ration, and power coefficient have varying distributions strongly associated with the sinusoidal inflow(periodic inflow)velocity variation that has a period of 30 seconds. The magnitude of the variation in the electrical current and blade rotating speed (also associated with tip speed ratio) is found to decrease with an increase of the resistances, which indicates that the inflow velocity variation causes a small effect on the turbine operation connected with a larger resistance. The statistics of the wake measurements summarized two important points. The first point is that the wind velocity of the periodic inflow changes from top to bottom, so the turbulence intensity of its wake (TI = 0.055) is greater than twice that of the oscillating inflow (TI = 0.025). The second point is that the periodic inflow characteristics from 120-second instantaneous velocity components at each measurement point can be filtered out through Fourier transform at ±4 wavenumbers. The filtered wake has characteristics similar to that under the oscillatory inflow condition.
論文目次 中文摘要...................................................I
ABSTRACT.................................................II
ACKNOWLEDGMENTS..........................................IV
CONTENTS..................................................V
LIST OF TABLES..........................................VII
LIST OF FIGURES........................................VIII
NOMENCLATURE..............................................X
CHAPTER 1 Introduction....................................1
1-1 Literature Reviews....................................3
1-2 Content of Research...................................7
CHAPTER 2 Experimental Equipment..........................8
2-1 Wind Tunnel...........................................9
2-2 Miniature Model of Wind Turbine......................13
2-3 Cobra Probe..........................................16
2-4 Laser Tachometer.....................................19
2-5 Experimental Details.................................20
CHAPTER 3 Theory and Analysis of the Motor...............24
3-1 Blade element momentum theory........................24
3-2 Analysis Power Performance of the Motor..............28
CHAPTER 4 Results and Discussion.........................31
4-1 The instantaneous velocity distribution for two inflow conditions...............................................31
4-2 The instantaneous power and Cp distribution of oscillatory and periodic inflow..........................33
4-3 The measurement using periodic inflow with different load resistances.........................................35
4-4 The instantaneous Cp and (C_p ) ̅ distribution......39
4-5 Instantaneous data distribution with periodic inflow under different loading resistances......................43
4-6 Characteristics of Turbine Wakes.....................46
CHAPTER 5 Conclusions....................................54
References...............................................56




參考文獻 [1] https://www.evwind.es/2019/06/21/at-least-103-countries-have-commercial-wind-energy-capacity/67662
[2] https://en.wikipedia.org/wiki/Wind_power_by_country
[3] L. J. Vermeer, J. N. Sørensen, and A. Crespo, "Wind turbine wake aerodynamics," Progress in Aerospace Sciences, vol. 39, no. 6-7, pp. 467-510, 2003.
[4] D. Medici and P. H. Alfredsson, "Measurements on a wind turbine wake: 3D effects and bluff body vortex shedding," Wind Energy, vol. 9, no. 3, pp. 219-236, 2006.
[5] W. Zhang, C. D. Markfort, and F. Porté-Agel, "Near-wake flow structure downwind of a wind turbine in a turbulent boundary layer," Experiments in Fluids, vol. 52, no. 5, pp. 1219-1235, 2011.
[6] W. Zhang, C. D. Markfort, and F. Porté-Agel, "Wind-Turbine Wakes in a Convective Boundary Layer: A Wind-Tunnel Study," Boundary-Layer Meteorology, vol. 146, no. 2, pp. 161-179, 2012.
[7] Y.-T.Luo, "A wind-tunnel study on the power production and the wake characteristics of a small wind turbine under different yaw conditions," National Cheng Kung University Department of Engineering Science,2019.
[8] Takeshi Ishihara, Atsushi Yamaguchi, and Yozo Fujino, "Development of a new wake model based on a wind tunnel experiment," The University of Tokyo,2016.
[9] A. Crespo and J. Hern a´ndez," Turbulence characteristics in wind-turbine wakes," Journal of Wind Engineering and Industrial Aerodynamics, vol.61, pp. 71-85, 1996.
[10] Jens No̸rkær So̸rensen and Wen Zhong Shen," Numerical Modeling of Wind Turbine Wakes," Journal of Fluids Engineering, vol. 124, no. 2, pp. 393-399, 2002.
[11] M.X.Song, K.ChenZ.Y.He, and X.Zhang," Wake flow model of wind turbine using particle simulation," Renewable Energy, vol. 41, pp. 185-190, 2012.
[12] Jang-Oh Mo, Amanullah Choudhry, Maziar Arjomandi, RichardKelso, Young-HoLee," Effects of wind speed changes on wake instability of a wind turbine in a virtual wind tunnel using large eddy simulation," Journal of Wind Engineering and Industrial Aerodynamics, vol. 117, pp. 38-56, 2012.
[13] Niels Troldborg, Jens N. Sorensen,and Robert Mikkelsen," Numerical simulations of wake characteristics of a wind turbine in uniform inflow," Wind Energy, vol. 13, pp. 86-99, 2010.
[14] Leonardo P. Chamorro, R. E. A Arndt and F. Sotiropoulos," Reynolds number dependence of turbulence statistics in the wake of wind turbines," Wind Energy, vol. 15, pp. 733-742, 2012.
[15] James F. Manwell, Jon G. McGowan, Anthony L. Rogers,' Wind Energy Explained: Theory, Design, and Application,2 nd ed,' John Wiley and Sons,2010.
[16] Ragheb, M. and A.M.Ragheb," Wind Turbines Theory - The Betz Equation and Optimal Rotor Tip Speed Ratio," Fundamental and Advanced Topics in Wind Power,2011.
[17] P. -Å. Krogstad and J. A. Lund, "An experimental and numerical study of the performance of a model turbine, "Wind Energy, vol. 15, no. 3, pp. 443-457, 2011.
[18] Zifeng Yang, Partha Sarkar, and Hui Hu," An Experimental Investigation on the Wake Characteristics of a Wind Turbine in an Atmospheric Boundary Layer Wind," 29th AIAA Applied Aerodynamics Conference,2011.
[19] B. Dou, M. Guala, L. Lei, and P. Zeng, "Experimental investigation of the performance and wake effect of a small-scale wind turbine in a wind tunnel," Energy, vol. 166, pp. 819-833, 2019.
[20] D. W. MacPhee and A. Beyene, "Performance analysis of a small wind turbine equipped with flexible blades," Renewable Energy, vol. 132, pp. 497-508, 2019.
[21] M.-H. Lee, Y. C. Shiah, and C.-J. Bai, "Experiments and numerical simulations of the rotor-blade performance for a small-scale horizontal axis wind turbine," Journal of Wind Engineering and Industrial Aerodynamics, vol. 149, pp. 17-29, 2016.
[22] C. L. Bottasso, F. Campagnolo, and V. Petrović, "Wind tunnel testing of scaled wind turbine models: Beyond aerodynamics," Journal of Wind Engineering and Industrial Aerodynamics, vol. 127, pp. 11-28, 2014.
[23] K. Toshimitsu, T. Narihara, H. Kikugawa, A. Akiyoshi, and Y. Kawazu, "Experimental study of improved HAWT performance in simulated natural wind by an active controlled multi-fan wind tunnel," Journal of Thermal Science, vol. 26, no. 2, pp. 113-118, 2017.
[24] J. N. Sørensen and G. A. M. van Kuik, "General momentum theory for wind turbines at low tip speed ratios," Wind Energy, vol. 14, no. 7, pp. 821-839, 2011.
[25] Louis Angelo Danao, Okeoghene Eboibi, RobertHowell," An experimental investigation into the influence of unsteady wind on the performance of a vertical axis wind turbine," Applied Energy, vol. 107, pp. 403-411, 2013.
[26] M. Refan and H. Hangan, "Aerodynamic Performance of a Small Horizontal Axis Wind Turbine," Journal of Solar Energy Engineering, vol. 134, no. 2, 2012.
[27] 張英彬,"風速特性與發電量之統計分析",開南學報,第七卷, pp.85-94 (2010).
[28] L. P. Chamorro and F. Porté-Agel, "A Wind-Tunnel Investigation of Wind-Turbine Wakes: Boundary-Layer Turbulence Effects," Boundary-Layer Meteorology, vol. 132, no. 1, pp. 129-149, 2009.
[29] Y.-T. Wu, C.-Y. Lin, and C.-M. Hsu, "An Experimental Investigation of Wake Characteristics and Power Generation Efficiency of a Small Wind Turbine under Different Tip Speed Ratios," Energies, vol. 13, no. 8, 2020.
[30] M. Bastankhah and F. Porté-Agel, "Wind tunnel study of the wind turbine interaction with a boundary-layer flow: Upwind region, turbine performance, and wake region," Physics of Fluids, vol. 29, no. 6, 2017.
論文全文使用權限
  • 同意授權校內瀏覽/列印電子全文服務,於2025-08-01起公開。
  • 同意授權校外瀏覽/列印電子全文服務,於2025-08-01起公開。


  • 如您有疑問,請聯絡圖書館
    聯絡電話:(06)2757575#65773
    聯絡E-mail:etds@email.ncku.edu.tw