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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 黃美嬌 | zh_TW |
dc.contributor.advisor | Mei-Jiau Huang | en |
dc.contributor.author | 胡皓南 | zh_TW |
dc.contributor.author | HaoNan Hu | en |
dc.date.accessioned | 2024-02-01T16:14:59Z | - |
dc.date.available | 2024-02-02 | - |
dc.date.copyright | 2024-02-01 | - |
dc.date.issued | 2024 | - |
dc.date.submitted | 2024-01-25 | - |
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[21] Rao, C., Ikeda, T., Nakata, T., and Liu, H., 2017, "Owl-inspired leading-edge serrations play a crucial role in aerodynamic force production and sound suppression," Bioinspir Biomim, 12(4), p. 046008. [22] Wang, J., Nakata, T., and Liu, H., 2019, "Development of Mixed Flow Fans with Bio-Inspired Grooves," Biomimetics (Basel), 4(4). [23] Wang, K., Ju, Y. P., and Zhang, C. H., 2021, "Aerodynamic optimization of forward-curved blade centrifugal fan characterized by inclining bionic volute tongue," Structural and Multidisciplinary Optimization, 63(5), pp. 2493-2507. [24] Wang, J., Liu, X., Tian, C., and Xi, G., 2023, "Aerodynamic performance improvement and noise control for the multi-blade centrifugal fan by using bio-inspired blades," Energy, 263. [25] Lee, S. J., Lee, E. J., and Sohn, M. H., 2014, "Mechanism of autorotation flight of maple samaras (Acer palmatum)," Experiments in Fluids, 55(4). [26] Holden, J. R., Caley, T. M., and Turner, M. G., 2015, "Maple Seed Performance as a Wind Turbine," 53rd AIAA Aerospace Sciences Meeting. [27] Hsu, C. H., Chen, J. L., Chang, C. C., Dang, H. S., and Tsai, W. F., "Bionic design of winged seed's aerodynamic force characteristics apply to wind turbine blades," Proc. 2017 International Conference on Applied System Innovation (ICASI), pp. 1359-1362. [28] Chu, Y. J., and Chong, W. T., 2017, "A biomimetic wind turbine inspired by Dryobalanops aromatica seed: Numerical prediction of rigid rotor blade performance with OpenFOAM (R)," Computers & Fluids, 159, pp. 295-315. [29] Benchikh Le Hocine, A. E., Poncet, S., and Fellouah, H., 2021, "CFD modeling and optimization by metamodels of a squirrel cage fan using OpenFoam and Dakota: Ventilation applications," Building and Environment, 205. [30] Huang, C. K., and Hsieh, M. E., 2009, "Performance Analysis and Optimized Design of Backward-Curved Airfoil Centrifugal Blowers," Hvac&R Research, 15(3), pp. 461-488. [31] Lee, K. J., Park, I. W., Bang, K. S., Kim, Y. M., and Ahn, Y. C., 2020, "Optimal Design of a Plenum Fan with Three-Dimensional Blades," Applied Sciences-Basel, 10(10). [32] Zhu, M. J., Li, Z. H., Li, G. H., Ye, X. X., Liu, Y., Chen, Z. Y., and Li, N., 2023, "An Investigation on Optimized Performance of Voluteless Centrifugal Fans by a Class and Shape Transformation Function," Processes, 11(6). [33] Wilcox, D. C., 2008, "Formulation of the k-w Turbulence Model Revisited," AIAA Journal, 46(11), pp. 2823-2838. [34] Menter, F. R., 1994, "Two-equation eddy-viscosity turbulence models for engineering applications," AIAA Journal, 32(8), pp. 1598-1605. [35] Luo, J., "Prediction of impeller induced flows in mixing vessels using multiple frames of reference," Proc. I. Chem. E. Symposium Series, pp. 549-556. [36] Kelder, J. D. H., Dijkers, R. J. H., van Esch, B. P. M., and Kruyt, N. P., 2001, "Experimental and theoretical study of the flow in the volute of a low specific-speed pump," Fluid Dynamics Research, 28(4), pp. 267-280. [37] Alemi, H., Nourbakhsh, S. A., Raisee, M., and Najafi, A. F., 2015, "Development of new "multivolute casing" geometries for radial force reduction in centrifugal pumps," Engineering Applications of Computational Fluid Mechanics, 9(1), pp. 1-11. [38] Hunt, J. C. R., Wray, A. A., and Moin, P., "Eddies, streams, and convergence zones in turbulent flows." [39] Lentink, D., Dickson, W. B., van Leeuwen, J. L., and Dickinson, M. H., 2009, "Leading-edge vortices elevate lift of autorotating plant seeds," Science, 324(5933), pp. 1438-1440. [40] Tan, K., Dong, S.-P., Lu, T., Zhang, Y.-J., Xu, S.-T., and Ren, M.-X., 2018, "Diversity and evolution of samara in angiosperm," Chinese Journal of Plant Ecology, 42(8), pp. 806-817. | - |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91591 | - |
dc.description.abstract | 為了提升工業用馬達的效率,增強馬達的散熱效果為一個重要的課題。有許多文獻著眼於馬達框架中的鰭片和冷卻管,還有框架外部風扇的導流板上。在此研究中我們著眼於馬達內部離心扇的優化設計,參考實際大型密閉式空氣冷卻馬達中的離心內扇運轉環境,以模擬的方式針對其工作點下的性能和效率進行分析,並提出具有較高靜壓效率的改進設計。
風扇的設計參數有很多,本研究採用以下三種:扇葉角度、扇葉數量和扇葉形狀;在扇葉形狀方面,我們嘗試翼型及仿生翅果的形狀來代替圓弧狀的原型。翅果是自然界中一類種子的名稱,在這些種子上存在有類似葉片的翅膀結構,能助其隨風飄向遠處以傳播子代。我們選擇仿效的是臺灣本土常見的槭樹之種子,屬單翅果。研究發現,風扇的扇葉角度和扇葉數量均存在最佳值,偏離該值的型號會在工作點呈現性能或效率的下降;翼型葉片與仿生的葉片在模擬中會得到比原型扇葉更高的靜壓效率與靜壓差。 | zh_TW |
dc.description.abstract | To enhance the efficiency of industrial motors, improving the heat dissipation of the motor is an important issue. Many studies have explored the effects of fins and cooling pipes within the motor frame, as well as guide plates on external fan shrouds. In this study, we focus on optimizing the orientation and number of fan blades of the inner centrifugal fan in a Totally Enclosed Air-to-Air-Cooled Motor. The fan performance at the specified flow rate is investigated by the steady RANS in use of a commercial software.
In addition to the original constant-thickness circular-arc blades, we also attempt using an airfoil shape and a shape inspired by winged seeds. Winged seeds are a type of seeds in nature that exhibit structures resembling wings, helping them to be carried by the wind to propagate offspring. We specifically focus on the single-winged seeds of the maple tree in Taiwan. The study finds different optimal blade angle and blade number for different blade shapes. The airfoil-shaped blades and modified biomimetic blades demonstrate higher static pressure efficiency compared to the original prototype blades. | en |
dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-02-01T16:14:59Z No. of bitstreams: 0 | en |
dc.description.provenance | Made available in DSpace on 2024-02-01T16:14:59Z (GMT). No. of bitstreams: 0 | en |
dc.description.tableofcontents | 口試委員審定書............................................................................................................... i
致謝.................................................................................................................................. ii 摘要................................................................................................................................. iii Abstract............................................................................................................................ iv 目錄.................................................................................................................................. v 表目錄........................................................................................................................... viii 圖目錄.............................................................................................................................. x 符號表........................................................................................................................... xvi 第 1 章 前言................................................................................................................ 1 1.1 研究背景 ........................................................................................................... 1 1.2 文獻回顧 ........................................................................................................... 1 1.3 研究目標 ........................................................................................................... 6 第 2 章 研究方法........................................................................................................ 7 2.1 統禦方程 ........................................................................................................... 7 2.2 紊流模型 ........................................................................................................... 8 2.3 其他模型 ......................................................................................................... 10 第 3 章 離心葉輪模型驗證...................................................................................... 12 3.1 離心水泵系統 ................................................................................................. 12 3.2 模擬設定 ......................................................................................................... 12 3.3 模擬結果 ......................................................................................................... 13 3.3.1 流場結構................................................................................................... 13 3.3.2 壓力係數................................................................................................... 14 第 4 章 工業通風離心扇原型模擬.......................................................................... 16 4.1 原型風扇及系統 ............................................................................................. 16 4.2 原型風扇模擬 ................................................................................................. 16 4.3 原型模擬 ......................................................................................................... 17 4.3.1 風扇相關參數........................................................................................... 17 4.3.2 原型模擬結果........................................................................................... 19 4.4 原型機優化 ..................................................................................................... 20 4.4.1 原型機扇葉角度因素探討....................................................................... 20 4.4.2 原型機扇葉數量因素探討....................................................................... 21 第 5 章 工業通風離心扇改進設計模擬.................................................................. 23 5.1 扇葉輪廓設計 ................................................................................................. 23 5.1.1 NACA 翼型............................................................................................... 23 5.1.2 仿生單翅果截面....................................................................................... 24 5.2 NACA 翼型之風扇模擬................................................................................. 25 5.2.1 NACA 翼型扇葉角度因素探討............................................................... 25 5.2.2 NACA 翼型扇葉數量因素探討............................................................... 26 5.3 單翅果仿生之風扇模擬 ................................................................................. 28 5.3.1 單翅果截面之扇葉角度因素探討........................................................... 28 5.3.2 縮窄化單翅果截面之扇葉角度因素探討............................................... 28 5.3.3 縮窄化單翅果截面之扇葉數量因素探討............................................... 29 5.4 總結 ................................................................................................................. 32 第 6 章 結論與展望.................................................................................................. 34 表.................................................................................................................................... 36 圖.................................................................................................................................... 48 參考文獻...................................................................................................................... 109 | - |
dc.language.iso | zh_TW | - |
dc.title | 離心風扇仿生翅果扇葉之性能模擬研究 | zh_TW |
dc.title | Simulation Study on Performance of Centrifugal Fan with Bionic Blades | en |
dc.type | Thesis | - |
dc.date.schoolyear | 112-1 | - |
dc.description.degree | 碩士 | - |
dc.contributor.oralexamcommittee | 陳希立;周逸儒;賴逢祥 | zh_TW |
dc.contributor.oralexamcommittee | Sih-Li Chen;Yi-Ju Chou;FENG-HSIANG LAI | en |
dc.subject.keyword | 離心扇,仿生葉形,翼型葉形,翅果, | zh_TW |
dc.subject.keyword | centrifugal fan,bionic blade,samara,airfoil, | en |
dc.relation.page | 113 | - |
dc.identifier.doi | 10.6342/NTU202400199 | - |
dc.rights.note | 同意授權(全球公開) | - |
dc.date.accepted | 2024-01-26 | - |
dc.contributor.author-college | 工學院 | - |
dc.contributor.author-dept | 機械工程學系 | - |
顯示於系所單位: | 機械工程學系 |
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