請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21941
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 葉仲基(Chung-Kee Yeh) | |
dc.contributor.author | Yu-Hsuan Chen | en |
dc.contributor.author | 陳郁璿 | zh_TW |
dc.date.accessioned | 2021-06-08T03:54:12Z | - |
dc.date.copyright | 2018-08-19 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-08-16 | |
dc.identifier.citation | 王明茂、顏克安、賴鑫騰。2004。小葉菜類收割機之試驗改良。高雄區農業改良場年報,第131頁。
台灣省農業試驗所。農豐牌YH-190型步行操作履帶式田間動力搬運機。農機具性能測定報告。台中:行政院農業委員會農業試驗所。 竹下農機。2018。雙人式採茶機。網址: http://www.chushiako.com.tw/pts.php?id=107。上網日期:2018-06-04。 行政院農業委員會。2018。農業統計資料查詢。台北:行政院農業委員會。網址:http://agrstat.coa.gov.tw/sdweb/public/inquiry/InquireAdvance.aspx。上網日期:2018-06-04。 吳柏諺。2008。利用計算流體力學檢討潔淨室設計之適正性。碩士論文。台北:國立臺北科技大學能源與冷凍空調工程系。 東林電子。2018。東林輕量型吹葉機。網址: http://www.comlink.com.tw/productsde.asp?MenuID=1738&ProID=3876。上網日期:2018-06-04。 東林電子。2018。東林鋰電池。網址: http://www.comlink.com.tw/productsde.asp?MenuID=1754&ProID=3880。上網日期:2018-06-04。 林暐程。2010。喜樹枝葉採收機之送風管流場分析。碩士論文。台北:國立臺灣大學生物產業機電工程學系。 泰仕電子工業股份有限公司。2018。AVM-03。網址: http://www.tes.com.tw/product_detail.asp?seq=107。上網日期:2017-10-28。 黃志新。2013。ANSYS Workbench 14.0超级学习手册。初版。北京: 人民郵電出版社。 Ali, A. A., S. S. Shalhoub, A. J. Cyr, C. K. Fitzpatrick, L. P. Maletsky, P. J. Rullkoetter and K. B. Shelburne. 2016. Validation of predicted patellofemoral mechanics in a finite element model of the healthy and cruciate-deficient knee. Journal of Biomechanics 49(2): 302-309. Huang, P. G., J. Bardina and T. Coakley. 1997. Turbulence modeling validation, testing, and development. NASA Technical Memorandum 110446. Jones, W. P. and B. E. Launder. 1972. The prediction of laminarization with a two-equation model of turbulence. International Journal of Heat and Mass Transfer 15(2): 301-314. Kunzelman, K. S., R. P. Cochran, C. Chuong, W. S. Ring, E. D. Verrier and R. D. Eberhart. 1993. Finite element analysis of the mitral valve. The Journal of Heart Valve Disease 2(3): 326-340. Nefske, D. J., J. A. Wolf Jr and L. J. Howell. 1982. Structural-acoustic finite element analysis of the automobile passenger compartment: a review of current practice. Journal of Sound and Vibration 80(2): 247-266. Ngo, D. and A. C. Scordelis. 1967. Finite element analysis of reinforced concrete beams. In Journal Proceedings 64(3): 152-163. Pegoretti, A., L. Fambri, G. Zappini and M. Bianchetti. 2002. Finite element analysis of a glass fibre reinforced composite endodontic post. Biomaterials 23(13): 2667-2682. Pietruszczak, S. T. and Z. Mroz. 1981. Finite element analysis of deformation of strain‐softening materials. International Journal for Numerical Methods in Engineering 17(3): 327-334. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/21941 | - |
dc.description.abstract | 葉菜類作物為台灣國內重要之食用作物,主要種植於溫網室中,因其產量大需要機器幫忙採收。但現行之採收機無法有效地將切割後之葉菜吹起並收集。
因此本研究的目的為透過改變末端送風管之設計以增進葉菜收集效果。方法為先透過實際量測與模擬模型之數據比較,確立使用之紊流模型。再利用此紊流模型建立葉菜類採收機風管模型並修改細部外觀參數,並透過計算流體力學軟體模擬分析葉菜類採收機送風管出口之流場。藉此找到一較佳之風管外觀設定。 藉由實際量測與模擬結果比較,得知Realizable k-epsilon模型為較符合用於模擬採收機風管之紊流模型。後續的分析便以此紊流模型為基礎進行模擬。 模擬結果顯示減少副管數量可以有效提升出口流速增加率,且同樣副管數量下,固定副管間距或固定首尾副管位置對出口流速增加率影響甚小。此外,改變副管長度對出口流速增加率也無顯著之影響。而縮小副管出口直徑則可以大幅增加出口流速增加率。副管與水平面夾角為60度以及副管與主管夾角為150度時,風管也能夠有較佳之出口流速增加率。 綜合以上模擬結果,建立一自訂模型,其主管長度600 mm、直徑50 mm,副管長度95 mm、直徑12 mm,共有5副管並且副管間彼此距離105 mm,第一支副管距離入口90 mm,且與水平面夾角為60度,與主管夾角為150度。模擬結果顯示該模型出口流速增加率為735.216%,比原始風管模型增加745.92%。 | zh_TW |
dc.description.abstract | Leafy vegetables are important food crops in Taiwan and are mainly grown in greenhouses and net houses. Because of its large output, machines are required to harvest the crops. However, current harvesters cannot effectively collect the cut leafy vegetables by blowing them. Accordingly, this study redesigned the air exit duct to improve collection efficiency of vegetable leaves. The turbulent flow model was first determined by comparing the actual measurement with the simulation model data. Next, the turbulent flow model was used to construct the air duct model of the harvester, appearance parameters were modified, and computational fluid dynamics software was employed to analyze whether the air duct model facilitates smooth air flow, thereby identifying optimal parametric values for the appearance of the air duct.
By comparing the actual measurement with the simulation results, this study found that the realizable k-epsilon model is more suitable for simulating the turbulent flow model of the harvester duct, which was then used in subsequent analysis. The simulation results show that reducing the number of auxiliary pipes can effectively increase the outlet discharge velocity. With the same number of auxiliary pipes, maintaining a fixed distance between the auxiliary pipes or between the first and last auxiliary pipe had a negligible influence on outlet discharge velocity. In addition, modifying the length of the auxiliary pipe did not significantly increase the outlet discharge velocity. However, reducing the diameter of the outlet of the auxiliary pipe markedly increased the outlet discharge velocity. Marked increases in outlet discharge velocity were also observed when the auxiliary pipe was positioned 60 degrees to the horizontal plane and when the angle between the auxiliary pipe and the main pipe is 150 degrees. Based on the simulation results, a custom model was constructed, comprising a main pipe (length = 600 mm, diameter = 50 mm) and 5 auxiliary pipes (length = 95 mm, diameter = 12 mm). The distance between the auxiliary pipes was 105 mm. The first auxiliary pipe was 90 mm from the duct inlet and was positioned 60 degrees to the horizontal plane and 150 degrees to the main pipe. The simulation results show that the discharge velocity of the proposed model increased by 735.216%, an increase of 745.92% compared to the original model. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T03:54:12Z (GMT). No. of bitstreams: 1 ntu-107-R04631022-1.pdf: 5037616 bytes, checksum: cf1132489733da9c410471343d788638 (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 誌謝 ii
摘要 iii ABSTRACT iv 圖目錄 vii 表目錄 viii 第1章 緒論 1 1.1 研究動機 1 1.2 研究目的 1 第2章 文獻探討 2 2.1 葉菜類採收機 2 2.2 計算流體力學 7 第3章 材料與方法 10 3.1 實驗設備及材料 10 3.2 實驗方法 16 3.3 改變模擬風管外觀參數 20 第4章 結果與討論 31 4.1 紊流模型 31 4.2 ANSYS模擬結果 33 第5章 結論與建議 56 5.1 結論 56 5.2 建議 57 參考文獻 58 附錄 模擬數據 60 | |
dc.language.iso | zh-TW | |
dc.title | 葉菜類採收機送風管之流場分析 | zh_TW |
dc.title | Analysis of the Flow Field in Air Ducts for a Leafy Vegetable Harvester | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 吳剛智(Gang-Jhy Wu),黃振康(CHEN-KANG HUANG) | |
dc.subject.keyword | 計算流體力學,ANSYS,流場分析,採收機,葉菜, | zh_TW |
dc.subject.keyword | CFD,ANSYS,Flow Field Analysis,Harvester,Leafy vegetables, | en |
dc.relation.page | 66 | |
dc.identifier.doi | 10.6342/NTU201802637 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2018-08-16 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 生物產業機電工程學研究所 | zh_TW |
顯示於系所單位: | 生物機電工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-107-1.pdf 目前未授權公開取用 | 4.92 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。