跳到主要內容

臺灣博碩士論文加值系統

(44.211.26.178) 您好!臺灣時間:2024/06/16 00:09
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:簡裔宸
研究生(外文):Chien, Yi-Chen
論文名稱:對轉軸流風扇聲音品質研究
論文名稱(外文):Study of the Sound Quality for a Counter-Rotating Axial Fan
指導教授:陳世雄陳世雄引用關係
指導教授(外文):Chen, Shih-Hsiung
口試委員:陳佑慈鄭敦仁
口試日期:2017-07-26
學位類別:碩士
校院名稱:國立成功大學
系所名稱:航空太空工程學系
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:2017
畢業學年度:105
語文別:中文
論文頁數:75
中文關鍵詞:軸流風扇突出比前後掠葉型降噪聲音品質
外文關鍵詞:Counter-rotating axial fanProminence ratioSwept bladesNoise reductionSound quality
相關次數:
  • 被引用被引用:0
  • 點閱點閱:21
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
近年來電子產品例如虛擬實境、筆記型電腦、顯示卡、遊戲機等的快速發展,使得散熱的挑戰更為嚴苛, 散熱業者的解決方案之一是在電子產品有限的空間中採用高轉速、高風量的風扇來達到散熱的需求, 其中包括使用高轉速對轉軸流風扇, 而風扇噪音變成另一個惱人的問題。在人類越趨向注重生活品質的情況下,風扇的噪音及品質變得更加需要改善。本研究針對對轉軸流風扇做噪音上的探討,並研究如何降低風扇的噪音與聲音品質。研究參數包含改變轉速匹配、動葉之葉片數、前掠與後掠之翼展等,研究是在固定的性能條件下進行噪音量測,以實驗的方法試著找到這些參數的變化結果,並加以整理分析。結果顯示,最大噪音源主要落在後級動葉的位置,因此,先針對葉片數做調整,找出噪音值較低之葉片數進行聲音品質優化,再藉由前、後級葉片轉速之匹配調整, 與改變前掠與後掠翼展之角度,來控制一倍頻葉片通過頻率之噪音值的大小, 與前、後級轉子之間交互作用之影響。在指定操作點下,與原始設計參數做比較,前級動葉有前掠葉片的整體噪音值改善了5%,突出比之最大值也改善了40% 。本文實驗目的在於探討在對轉軸流風扇改善聲音品質與降低噪音的可能性,期望能給予風扇研究人員日後設計上之參考。
In recent years, electronic products such as virtual reality, notebook computers, graphics cards, gaming machines, etc. have rapid development, making the challenge of cooling more stringent. One of the cooling solutions is the use of high speed, high air flow fans in the limited space of the electronic products to meet the heat dissipation demand. This includes the use of high speed counter rotating axial fans. The fan noise however becomes another annoying problem. While human beings tend to pay more attention to the quality of life, the fan noise and its quality become more need to improve. In this paper, the noise of the counter rotating axial fan and how to reduce the noise and sound quality of the fan were studied. The parameters studied include the speed variations of the front and rear fans, the number of blades, and the swept blades. The study was performed with noise measurements under fixed performance conditions and try to find the influences of these parameters in an experimental way. The results show that the largest noise source is mainly from the rear fan blades. The number of blades was adjusted and the blade number with lower noise value was picked to study the effect of the front and rear blade speed variations, and the effect of swept blades from the level at the first blade passing frequency (BPF). Compared with the original design parameters at the specified operating point, the overall noise level of the design with forward swept front blades was improved by 5%, and the maximum prominence ratio was improved by 40%. The purpose of this study is to explore the possibility of improving the sound quality and noise level of a counter rotating axial fan. It is expected that the results will give the fan designers a good design reference.
摘要 I
ABSTRACT III
誌謝 V
圖目錄 IX
表目錄 XIII
符號說明 XIV
第一章 緒論 1
1-1前言 1
1-2文獻回顧 3
1-3內容簡介 9
第二章 軸流風扇設計與噪音特性 10
2-1軸流風扇設計理論 10
2-1-1計算速度三角形與葉片選擇 10
2-2 軸流風扇噪音特性 13
2-3 噪音參數 14
2-3-1 聲壓級(Sound pressure level) 15
2-3-2 響度(Loudness)與響度級(Loudness level) 15
2-3-3 突出比(Prominence ratio) 17
2-3-4 頻率加權(Frequency weighting) 21
2-3-5 時間加權(Time weighting) 21
2-4 視窗加權 22
2-5 心理聲學 24
2-5-1 遮蔽效應 24
2-5-2 臨界頻帶 24
第三章 實驗設備與方法 26
3-1 風洞(Wind tunnel) 26
3-2 半無響室(Hemi-anechoic chamber) 30
3-3 實驗方法 34
3-3-1 實驗模型 34
3-3-2 風洞量測步驟 35
3-3-3 噪音量測步驟 35
第四章 結果與討論 38
4-1 原始風扇參數 38
4-1-1原始參數之實驗結果 44
4-2 動葉片數之調整 47
4-2-1實驗結果 48
4-3 風扇轉速匹配 52
4-3-1 實驗結果 53
4-4 前級動葉之前掠與後掠調整 57
4-4-1 實驗結果 58
4-5 後級動葉之前掠與後掠調整 63
4-5-1 實驗結果 64
第五章 結論 69
5-1 結論 69
5-2 未來工作 70
參考文獻 72
[1]Duncan, P. E., Dawson, B. and Hawes, S. P., “Design techniques for the reduction of interaction tonal noise from axial flow fans,” In Proceedings Conference on Vibrations and Noise in Pump, Fan, and Compressor In-stallatios, pp. 143-161, 1975.
[2]Benzakein, M. J., “Research on fan noise generation,” Journal of the Acoustical Society of America, Vol. 51, pp. 1427-1438, 1972.
[3]Suzuki, S. and Kanemitsu, Y., “An experimental study on noise reduction of axial flow fan,” In proceeding 7th International Congress on Acoustics, pp. 373-376, 1971.
[4]Brown, N. A., “The use of skewed blades for ship propellers and truck fan,” In Proceeding 98th ASME Winter Annual Meeting, pp. 201-207, 1977.
[5]Wu, C. H., “A general theory of three-dimensional flow in subsonic and supersonic turbomachines of axial-, radial-, and mixed flow type,” NACA TN-2604, 1952.
[6]Tsai, C. R., “The study of the tip clearance flow of compressor blades,” Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, Thesis for Master Degree, 1997.
[7]Shih, S. R., “The influence of tip clearance on compressor performance,” Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, Thesis for Master Degree, 2002.
[8]Longhouse, R., “Control of tip clearance noise of axial flow fans by rotating shrouds,” Journal of Sound and Vibration, Vol. 58, pp. 201-214, 1977.
[9]Fukano, T., Takamaxsu, Y. and Kodama, Y., “The effects of tip clearance on the noise of low pressure axial and mixed flow fans,” Journal of Sound and Vibration, Vol.105, pp. 291-308, 1986.
[10] Weick, F., “Aircraft propeller design,” McGraw-Hill Book Co., 1930.
[11] Nelson, W., “Airplane propeller principles,” John Wiley & Sons Inc., 1944.
[12] Glauert, H., “The elements of aerofoil and airscrew theory,” Cambridge University Press, 1947.
[13] Theodorsen, T., “Theory of propellers,” McGraw-Hill Book Co., 1948.
[14] Cheng, Y. T., “Performance numerical simulation of a wind turbine with variable pitch blades,” Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, Thesis for Master Degree, 2011.
[15] Xiao, J. L., “Performance numerical simulation of a ducted water turbine with variable pitch blades,” Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, Thesis for Master Degree, 2011.
[16] Wang, S. H., “Performance enhancement study of diffuser augmented wind turbines,” Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, Dissertation for Doctor of Philosophy, 2013.
[17] Leitch, T. A., “Reduction of Unsteady Rotor-Stator Interaction Using Trailing Edge Blowing,” Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Virginia, Thesis for Master Degree, 1997.
[18] Lemke, O., Neise, W., Enghardt, L. and Moser, M., “Control of tonal fan noise using flow induced secondary sound sources generated by air jet actuation,” 30th AIAA Aeroacoustics Conference, paper AIAA 2009-3227, Florida, 2009.
[19] Yamaguchi, T., Minorikawa, G. and Kihara M., “Study on evaluation method of the pure tone for small fan,” Proceedings of Inter-noise, Japan, 2014.
[20] Wang, C., “Noise source analysis and control for small axial-flow fans,” Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, Dissertation for Doctor of Philosophy, 2016.
[21] Kaivola, R., “Noise emission of telecommunication devices,” electronics cooling, 2001.
[22] 蘇德勝, “噪音原理與控制,” 臺隆書店, 1999.
[23] ECMA-74, “Measurement of airborne noise emitted by information technology and telecommunications equipment,” 2003.
[24] Bruel and Kjaerl, “Technical review,” 1987.
[25] Fastl, H. and Zwicker, E., “Psychoacoustics: Facts and Models,” 2006.
[26] Zhao, X., Sun, J. and Zhang, Z., “Prediction and measurement of axial flow fan aerodynamic and aero-acoustic performance in a split-type air-conditioner outdoor unit,” School of Energy and Power Engineering, Xi’an Jiaotong University, China, 2012.
[27] 李芳壽, “AMCA 210-99系列風洞簡介”, 瑞領科技股份有限公司.
[28] PAL Acoustics Technology Ltd, “Sound quality and vibration test report,” Report No.: TH3-16-0220, 2016.
[29] Ohtsuta, K., Akishita, S. “Noise reduction of shortly ducted fan by using forward swept and inclined blade,” 13th AIAA Aeroacoustics Conference, AIAA 90-3986, Tallahassee,1990.
[30] Ni, R. H., “Compressors for turbo fan engines-Axial Flow Compressors, Workshop on Turbofan Engine,” Taiwan, 2016.
[31] Lee, C. H., “The study of axial fan with even-blade rotor,” Department of Mechanical Engineering, National Taipei University of Technology, Taiwan, Thesis for Master Degree, 2009.
[32] Lin, S. C., “Numerical and experimental study of the performance for a small two-stage axial fan,” Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taiwan, Thesis for Master Degree, 2011.
[33] Chen, B. J., “The influence of the tongue of centrifugal fan on performance and noise,” Department of Aeronautics and Astronautics, National Cheng Kung University, Taiwan, Thesis for Master Degree, 2003.
[34] Su, Y. M., “Sound quality study of centrifugal fan,” Department of Mechanical Engineering, National Pingtung University of Science and Technology, Taiwan, Thesis for Master Degree, 2010.
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top