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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
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dc.contributor.advisor | 楊鏡堂(Jing-Tang Yang) | |
dc.contributor.author | Chia-Yu Chang | en |
dc.contributor.author | 張家瑜 | zh_TW |
dc.date.accessioned | 2021-06-15T11:09:57Z | - |
dc.date.available | 2022-02-08 | |
dc.date.copyright | 2017-02-08 | |
dc.date.issued | 2016 | |
dc.date.submitted | 2016-10-06 | |
dc.identifier.citation | Bergou, A. J., Xu, S., & Wang, Z. (2007). Passive wing pitch reversal in insect flight. Journal of Fluid Mechanics, 591, 321-337.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/48830 | - |
dc.description.abstract | 本文研究蜻蜓、豆娘等使用四翅飛行的昆蟲,其前後翅拍翅相位不同對飛行之影響。以翅膀拍翅相位作為主要探討的對象,設計一組可以高頻順序帶動前後翅的翅膀機構,以此機構量測升阻力及拍攝流場結構,探討四翼動態在不同飛行形態上扮演的角色,期望應用於拍翼飛行器操作性的提升。
前人研究指出:後翅領先四分之一相位的拍撲模式能夠提供翅膀最多的升力。然而,觀察蜻蜓與豆娘的拍翅行為,我們發現:在前飛時,蜻蜓傾向後翅領先四分之一相位,但豆娘傾向前翅領先四分之一相位。此外,雖然豆娘與蜻蜓在外觀上相似,但蜻蜓的翅膀負重比約為豆娘的兩倍,蜻蜓的拍翅頻率也比豆娘快。本研究嘗試探討豆娘與蜻蜓不同的拍撲模式,除了升力係數外,考慮其他與飛行相關的特徵和配合生物特性的解釋。本實驗仿昆蟲拍翅,建立翅膀被動式旋轉的拍撲機構,使用高速攝影機拍攝,利用二維PIV流場可視化技術,觀察渦漩在不同翅相位排列下的消長關係。同時設計力感測計在機構拍翅根部,測量拍翅產生流場升阻力在週期內的變化。實驗結果顯示:因翅膀被動旋轉與拍翅相位的效應疊加,前後二翅在流場中排列成不同的幾何形狀。後翅領先使得後翅受前翅干擾減小,兩翅周圍有類似的流場形狀;而前翅領先導致後翅位於前翅的尾流區,未觀察到明顯的翼前緣渦漩產生。後翅領先的拍翅模式最可以充分利用拍撲的氣流產生升力;而前翅領先的拍翅模式會減低後翅拍翅產生的升力。然而,在前翅領先的拍翅模式,後翅的形狀阻力因來流方向被前翅改變而大大降低,故阻力比起後翅領先的拍翅模式來的小。我們可以從量測的升阻力去驗證上述情形:前翅領先的平均升阻力值皆較小,但一個拍撲週期內的波動變化也較小。 綜合以上結果,本研究提供翅膀拍翅相位的新觀點,可應用於拍撲飛行器的機構概念設計上。 | zh_TW |
dc.description.abstract | Insects under the order Odonata such as dragonflies and damselflies have outstanding flight agility. One of the morphological features is that they modulate their flight motion with independent four wings. Preceding studies show that lift remains maximum when the forewing lags behind hindwing about a quarter stroke cycle, which is the phase relationship dragonflies prefer in forward flight and ascending. However, we observe that in the flying damselflies tend to operate their wings with the forewing leads.
Herein, we demonstrate the effect of phase lag by two simple passive rotation robot wings. The aerodynamic vortex structures are illustrated by particle imaging velocimetry (PIV) techniques. Lift and drag force are measured and analyzed corresponding to wing-wake structure. The results reveal that the flight performance is strongly dependent on the phase shift between two wings. Leading edge vortex (LEV) and trailing edge vortex (TEV) are interfered by the change of flow in different phase relationships. At the phase of forewing-lead, the vorticity of the hindwing is decreased because of the forewing induced flow. Passive wing rotation in different phase relationship is also investigated. The force acting on the moving wing changes as the induced flow varies, causing different quantity of deformation, lift and drag. Damselflies seem to have evolved a different forward flight strategy from dragonflies, which lowers the power consumption but provides less total lift. Wing loading of damselfly is about half of damselfly’s, therefore, the minimum requirement of lift production is also lower. In addition, the variation of lift force and drag force within one cycle is lower. The results may be applied to future design of flight vehicles. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T11:09:57Z (GMT). No. of bitstreams: 1 ntu-105-R03522313-1.pdf: 3190002 bytes, checksum: 6fae10f045a0da2f166951b18c9af04d (MD5) Previous issue date: 2016 | en |
dc.description.tableofcontents | 摘要 ii
Abstract iii 目錄 iv 圖表目錄 vi 符號說明 x 第一章 前言 1 第二章 文獻回顧 3 2-1 飛行機制介紹 3 2-1.1 名詞介紹 4 2-1.2 渦度與環流量 5 2-1.3 Kutta-Joukowski 定理 6 2-1.4 翼前緣渦漩 (leading edge vortex) 7 2-1.5 旋轉升力 (rotation lift) 8 2-1.6 拍翼與拋翼 (clip and fling) 11 2-1.7 翅膀撓性 (wing flexibility) 11 2-2 豆娘構造簡介 12 2-2.1 基本構造介紹 12 2-2.2 振翅結構 13 2-3 蜻蜓與豆娘的飛行研究 14 2-3.1 蜻蜓與豆娘的飛行性能探討 14 2-3.2 蜻蜓與豆娘的飛行機制 14 2-4 微型飛行器 16 2-4.1 起源與形式 16 2-4.2 飛行器的種類 16 2-4.3 撲翼飛行器 17 第三章 研究方法 20 3-1 研究架構 20 3-2 實驗參數與無因次化 20 3-3 動作分析 23 3-3.1 拍撲動作分析 24 3-3.2 翅膀旋轉分析 25 3-4 機構設計 27 3-5 分析方法 32 3-5.1 動作分析 32 3-5.2 粒子影像測速儀 35 3-5.3 升力量測 38 3-5.4 升力量測分析 41 第四章 結果與討論 43 4-1 流場分析 43 4-1.1 單翅拍撲 44 4-1.2 雙翅同相位拍撲 45 4-1.3 雙翅後翅領先拍撲 46 4-1.4 雙翅前翅領先拍撲 47 4-2 升力阻力分析討論 48 4-3 豆娘的飛行策略 51 第五章 結論與未來展望 54 5-1 結論 54 5-2 未來展望 56 5-3 甘特圖 57 參考文獻 58 | |
dc.language.iso | zh-TW | |
dc.title | 翅膀相位對豆娘拍撲飛行之影響 | zh_TW |
dc.title | Phase Lag on Flapping Flight of Damselflies | en |
dc.type | Thesis | |
dc.date.schoolyear | 105-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 郭振華(Zhen-Hua Guo),趙怡欽(Yei-Chin Chao),紀凱容(Kai-Rong Ji),楊瑞珍(Ruey-Jen Yang) | |
dc.subject.keyword | 昆蟲,粒子顯像速度儀,飛行力學,翼前緣渦旋, | zh_TW |
dc.subject.keyword | insect flight,particle image velocimetry,aerodynamics,leading edge vortex, | en |
dc.relation.page | 61 | |
dc.identifier.doi | 10.6342/NTU201603635 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2016-10-07 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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