跳到主要內容

臺灣博碩士論文加值系統

(44.220.62.183) 您好!臺灣時間:2024/03/01 22:45
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:游志堅
研究生(外文):You Jih Jian
論文名稱:Pentium4筆記型電腦冷卻風扇之數值模擬
論文名稱(外文):Numerical Analysis of a Cooling Fan Applied on Pentium 4 Notebook Computers
指導教授:林顯群林顯群引用關係
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:機械工程系
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:2001
畢業學年度:89
語文別:中文
論文頁數:143
中文關鍵詞:Pentium 4風扇數值分析
相關次數:
  • 被引用被引用:0
  • 點閱點閱:254
  • 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
本文針對Pentium 4筆記型電腦之散熱需求,且為提升風扇之性能達到高風量、低噪音的目標,乃設計整體尺寸為50×50×10 mm之散熱風扇,並自行設計軸流葉輪與平板輻射葉片分別搭配離心蝸式流道。於設計初期,除配合扇葉設計理論設定各項參數,並將葉片外形為控制項目,經由數值計算及初步流場分析,以作為葉形選擇的參考依據。其次,配合實際應用需求以進一步提昇散熱效益,在風扇設計上採取葉片數及入風口直徑之改變。藉由數值模擬分析及實驗驗證,發現平板輻射葉形於性能上均優於軸流形式,且噪音之改善有明顯之成效。在葉片數多寡分析方面,得知增加葉片數可提昇靜壓,經量測證實最大靜壓可提升達13.83%。而不同入風口直徑之探討方面,經由數值計算結果,顯示出入風口直徑加大將使風量提升,並且上蓋直徑37 mm之風扇實體,增量達到15.15%的效果。因此,本研究之結果除確立此扇葉設計之可行性,及證明入風口改良將有效地提昇風扇性能,同時經實驗量測而驗證數值分析之正確度。

A comprehensive numerical study is performed for the flowfields associated with the cooling fan of notebook computers. This new design, composed of an axial-flow impeller or a radial-plate impeller with a centrifugal housing, aims to produce a sufficient volume flow rate with high-pressure and low-noise characteristics. At first, by means of theoretical analysis, a 50×50×10 mm cooling fan is generated to match the performance of the best product in the market. Later, the corresponding flowfield is carefully examined through numerical results to yield necessary fan modifications. Additionally, a parametric study on fan geometry is carried out to enhance the overall performance of this cooling fan. The parameters considered here include blade number and inlet diameter. Regards experimental verification, the performance tests are executed in AMCA 210-85 test chamber. Experiments indicate that enlarging the inlet diameter attains 15.15% increases on flow rate. Besides, significant increments on static pressure are observed for all cases with more blade numbers. Moreover, the corresponding influences and associated flowfields caused by the above parameters are analyzed and discussed extensively. Noteworthy, the numerical outcomes are correlated well with the experimental results for all cases studied. Consequently, this work may offer a reliable design and analysis tool to generate a cooling fan for fulfilling the cooling demand of notebook computers.

中文摘要 --------------------------------------------------- I
英文摘要 -------------------------------------------------- II
誌 謝 --------------------------------------------- III
目 錄 ---------------------------------------------- IV
符號索引 ------------------------------------------------- VII
圖表索引 ------------------------------------------------- XII
第一章 緒論 ------------------------------------------------ 1
1.1 前言 -------------------------------------------------- 1
1.2 文獻回顧 ----------------------------------------------- 6
1.2.1 扇葉外型設計 ----------------------------------------- 6
1.2.2 風扇性能改良 ----------------------------------------- 7
1.2.3 數值模擬分析 ----------------------------------------- 8
1.3 研究動機與目的 ---------------------------------------- 12
1.4 本文架構 ---------------------------------------------- 14
第二章 扇葉設計 ------------------------------------------- 16
2.1 NACA翼剖面設計 ---------------------------------------- 17
2.2 軸流扇葉設計 ------------------------------------------ 23
2.3 平板輻射葉形剖面設計 ---------------------------------- 31
第三章 數值方法 ------------------------------------------- 34
3.1 基本理論與假設 ---------------------------------------- 34
3.2統御方程式 --------------------------------------- 35
3.2.1 紊流模式 -------------------------------------------- 36
3.3 數值方法 ---------------------------------------------- 38
3.3.1 離散化方程式 ---------------------------------------- 39
3.3.2 SIMPLE解法理論 -------------------------------------- 42
3.3.3 邊界條件與初始條件 ---------------------------------- 46
3.4 數值分析規劃 ------------------------------------------ 47
3.5 數值格點之建立 ---------------------------------------- 49
3.6 計算程式之驗證 ---------------------------------------- 59
第四章 數值計算結果 --------------------------------------- 60
4.1網格分析 ----------------------------------------------- 61
4.2葉片外形比較 -------------------------------------------- 64
4.2.1 整體流場分析 ---------------------------------------- 64
4.2.2 壓力等位分析 ---------------------------------------- 73
4.3葉片數比較 ---------------------------------------------- 84
4.3.1 整體流場分析 ---------------------------------------- 84
4.3.2 壓力等位分析 ---------------------------------------- 90
4.4入風口直徑 ---------------------------------------------- 93
4.4.1 整體流場分析 ---------------------------------------- 93
4.4.2 壓力等位分析 ---------------------------------------- 93
4.5 實驗結果與數值結果比較 -------------------- 102
第五章 結論與建議 ---------------------------------------- 104
5.1 結論 ------------------------------------------------ 104
5.2 建議 ------------------------------------------------ 106
參考文獻 ------------------------------------------------- 108
附錄A 實驗結果 ------------------------------------------- 114
A.1 實驗設備 --------------------------------------------- 114
A.1.1 實體模型製作 --------------------------------------- 114
A.1.2 性能測試系統 --------------------------------------- 117
A.1.3 噪音量測設備 --------------------------------------- 119
A.2 實驗結果與比較分析 ----------------------------------- 121
A.2.1 葉片外形比較 --------------------------------------- 121
A.2.2 不同葉片數之比較 ----------------------------------- 125
A.2.3 不同入風口直徑比較 --------------------------------- 127
作者簡介 ------------------------------------------------- 129

1.施威銘,“電腦選購、組裝、設定”,旗標出版社,1998。
2.Horlock, J. K. and Robert, E., “Axial Flow Compressors,” Krieger Publishing Co., 1973.
3.Eck, B., “Fans,” Pergamon Press, N.Y., 1975.
4.押田良輝,“送風機技術讀本”,復漢出版社,1979。
5.Wallis, R. A., “Axial Flow Fans & Ducts,” John Wiley & Sons, N.Y., 1983.
6.聶能光、李福忠,“風機節能與降噪”,科學出版社,1990。
7.鍾守安,“送風機的技術”,大豐機器股份有限公司,1972。
8.伍賀篤,“空氣機械設計”,近代工學出版社,1974。
9.Shepherd, D. G., “Principles of Turbomachinery,” Macmillan Publishing Co., Inc., New York, 1956.
10.林國楨,“汽車引擎冷卻風扇設計發展”,機械工業雜誌,pp. 204-214,民國八十年九月。
11.簡煥然、施銘銓,“軸流風扇性能測試技術與扇葉技術”,機械工業雜誌,pp. 269-288,民國八十一年八月。
12.施銘銓,“小型冷卻風扇開發介紹”,機械工業雜誌,pp. 148-156,民國八十四年五月。
13.張瑞釗、許忠福、施良璘、張起領,“渦輪葉片參數設計法”,中山科學研究院,第一研究所研究報告,民國七十五年六月。
14.陳世雄,“動力渦輪機組規劃設計”,工研院研究計畫報告,1995。
15.蘇聖斌、陳世雄,“軸流泵葉輪與導葉之設計分析”,中國機械工程學會第十三屆學術研討會論文集,pp. 298-306,1996年11月。
16.林志遠,“軸流風扇的性能提昇設計與測試”,國立成功大學碩士論文,1997年6月。
17.林育洲,“軸流風扇之數值與實驗分析”,國立台灣科技大學機械工程技術研究所碩士論文,1998年7月。
18.Miyake, Y., Inaba, T., and Nishikawa, Y., "A Study on the Flow within the Flow Passage of an Axial Flow Fan Equipped with Air-separator", Bulletin of JSME, Vol. 29, No. 256, Paper No. 256-23, Oct. 1986, pp. 3394-3401.
19.Inoue, M., Kuroumaru, M. and Ando, Y. " Tip Clearance Flow in Axial Flow Impellers at Low Flow Rate", Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan, Vol. 56, No. 526, 1990, pp. 1690-1695.
20.Venter, S. J. and Kroger, D.G. “The Effect of Tip Clearance on the Performance of an Axial Flow Fan,” Energy Convers. Mgmt, Vol. 33, No. 2, 1992, pp. 89-97.
21.胡文聰, “渦輪機壁層流之實驗與計算研究”, 台灣大學應用力學研究所, 1994年。
22.洪宗揚,“後傾式離心風機之噪音研究”,國立台灣科技大學機械工程技術研究所碩士論文,1996年6月。
23.呂水煙,“前傾式離心風機之減噪研究”,國立台灣科技大學機械工程技術研究所碩士論文,1997年7月。
24.陳文亮,“小型冷卻風扇之性能及噪音改善研究”,國立台灣科技大學機械工程技術研究所碩士論文,1998年7月。
25.Hanson, D. B., “Compressible Helicoidal Surface Theory for Propeller Aerodynamics and Noise,” AIAA Journal, Vol. 21, No. 6, 1983, pp. 881-889.
26.Woodward, F. A. “An Improved Method for the Aerodynamic Analysis of Wing-Body-Tail Configurations in Subsonic and Supersonic Flows, Part I : Theory and Application,” NASA CR-2228, 1973.
27.McFarland, E. R. “Solution of Plane Cascade Flow Using Improved Surface Singularity Methods,” Journal of Engineering for Power, Vol. 104, 1982, pp. 668-674.
28.Kobayakawa, M. and Onuma, H., “Propeller Aerodynamic Performance by Vortex-Lattice Method,” Journal of Aircraft, Vol. 22, No. 8, August 1985, pp. 649-654.
29.Chen, T., Suciu, E. O. and Morino, L., “A Finite Element Method for Potential Aerodynamics around Complex Configurations,” AIAA paper, January 1974.
30.Chen, S. H. and Williams, M. H., “Panel Method for Counter-Rotating Propfans,” Journal of Propulsion and Power, Vol. 7, No. 4, July-August 1991.
31.孟德化,“軸流式風扇葉片設計”,國立成功大學航空太空工程研究所碩士論文,1995年7月。
32.江易儒,“導管風扇之流場分析”,國立成功大學航空太空研究所碩士論文,1996年6月。
33.張裕慶,“軸流風扇之數值模擬”,國立台灣科技大學機械工程技術研究所碩士論文,1997年7月。
34.Wu, C. H., “A General Theory of Three-Dimentional Flow in Subsonic and Supersonic Turbomachines of Axial-, Radial-, and Mixed Flow Type,” NACA TN2604, 1952.
35.Smith, L. H. Jr., “The Radial Equilibrium Equation of Turbomachinery,” Trans., ASME, Journal of Engineering for Power, 88A, 1, 1966.
36.Crouse. J. E. and Gorrel, W. T., “Computer Performance for Aerodynamic and Blade; Design of Multistage Axial-Flow Compressors,” NASA TP-194B. 1981.
37.Abdallah, S., Smith, C. F. and McBride, M. W., “Unified Equation of Motion (UEM) Approach as Applied to S1 Turbomachinery Problems,” Journal of Fluids Engineering, Trans. ASME, Vol. 110, 1988, pp.251-256.
38.Marsh, H., “A Digital Computer Problem for the Through-Flow Fluid Mechanics in an Arbitrary Turbomachine, Using a Matrix Method,” Aeronautical Research Council Report & Memorandum, No. 3509, 1968.
39.Katsanis, T. and McNally, W. D., “Fortran Program for Calculating Velocities and Streamlines on Hub-Shroud Mid-Channel Flow Surface of an Axial- or Mixed-Flow Turbomachine,” NASA TN D-7343, 1973.
40.Hirsch, C. H. and Warzee, G., “A Finite-Element Method for Through Flow Calculations in Turbomachines,” Journal of Fluids Engineering, Trans. ASME, Vol. 98, 1976, pp. 403-421.
41.Yamamoto, O. and Barton, J. M., “Improved Euler Analysis of Advanced Turboprop Propeller Flows,” AIAA paper No. 86-1521, 1986.
42.Denton, J, D., “The Calculation of Three-Dimensional Viscous Flow Through Multistage Turbomachines,” Journal of Turbomachinery, Vol. 114, January 1992, pp. 18-26.
43.Ni, R. H., “A Multiple Grid Scheme for Solving the Euler Equations,” AIAA Journal, Vol. 20, No. 11, November 1982.
44.Moore, J. and Moore, J. E., “Performance Evaluation of Linear Turbine Cascade Using Three-Dimensional Viscous Flow Calculations,” ASME Journal of Engineering for Gas Turbine and Power, Vol. 17, No. 1, 1985, pp. 969-975.
45.Chima, R. V., “Inviscid and Viscous Flows in Cascades with an Explicit Multiple Grid Algorithm,” AIAA Journal, Vol. 23, 1985, pp. 1556-1563.
46.Rai, M. M., “Navier-Stokes Simulations of Rotor-Stator Interaction Using Patched and Overlaid Grids,” Journal of Propulsion and Power, Vol. 3, No. 5, September 1987, pp. 387-396.
47.Hah, C., “Navier-Stokes Analysis of Three-Dimensional Unsteady Flows Inside Turbine Stages”, AIAA paper No. 92-3211, 28th Joint Propulsion Conference and Exhibit, Nashville, TN, July 1992.
48.胡文聰、許書宗,“軸流壓縮葉片非定常受力”,中國機械工程學刊,第十八捲,第五期,第437~443頁。
49.Dawes, W. N., “Toward Improved Through-Flow Capability:the Use of Three-Dimensional Viscous Flow Solvers in a Multistage Environment,” Journal of Turbomachinery, Vol. 114, January 1992, pp. 8-17.
50.Chen, S. H. and Prueger, G. H., “Multistage Turbomachinery Flow Solutions Using Three-Dimensional Implicit Euler Method,” AIAA paper No. 93-2382, 29th Joint Propulsion Conference and Exhibit, Monterey, CA, U.S.A, June 1993.
51.簡宏斌,“PC風扇之三維數值模擬分析”,國立台灣科技大學機械工程技術研究所碩士論文,1999年7月。
52.許豐麟,“新式筆記型電腦冷卻風扇之數值模擬”,國立台灣科技大學機械工程技術研究所碩士論文,2000年7月。
53.Patankar, S. V., “Numerical Heat Transfer and Fluid Flow”, McGraw-Hill, 1981
54.Tannehill, J. C., Anderson, D. A., and Pletcher, R. H. “Computational Fluid Mechanics and Heat Transfer”, Taylor and Francis, 1997
55.Abbott, I H and von Doenhoff, A E, “Theory of Wing Sections, Including a Summary of Airfoil Data”, Dover, N. Y., 1989
56.ISO-3740, "Acoustics-Determination of Sound Power Level of Noise Sources-Guidelines for the Use of Basic Standard and for the Preparation of Noise Test Codes", 1980(E).
57.CNS 8753, "風扇、鼓風機、壓縮機噪音級測定法", 中國國家標準, CNS 8753, Z8024, 1982年。

QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top