English  |  正體中文  |  简体中文  |  Items with full text/Total items : 51510/86705 (59%)
Visitors : 8261274      Online Users : 102
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/18471

    Title: 懸停時動態失速對旋翼葉片系統之影響
    Other Titles: The Effect of Dynamic Stall on Rotor Blades in Hover
    Authors: 王怡仁;李明峰;張鴻文
    Contributors: 淡江大學航空太空工程學系
    Keywords: 直昇機;動態失速;旋翼葉片;尾流動力學;非穩態翼剖面理論;誘導流理論;Helicopter;Dynamic Stall;Rotor Blade;Wake Dynamics;Unsteady Airfoil Theory;Induce-Flow Theory
    Date: 2001-05
    Issue Date: 2009-09-01 13:37:08 (UTC+8)
    Publisher: 臺北縣:淡江大學
    Abstract: 本研究利用解析的方法將尾流運動方程、葉片空氣動力學、ONERA動態失速模式及一個非線性複材葉片的結構運動方程整合成一耦合的非線性系統。利用Galerkin法及Duncan多項式將其展開,並分成非線性平衡態及線性擾動態兩種方程式。而非線性平衡態部份將利用數值法求出與時間無關之係數;再求取該耦合模式的平衡態的解。平衡態的具體結果包含了在此非穩態空氣動力系統及動態失速之下的旋翼葉片在懸停時,其尖端的位移值,此數據一方面可提供擾動態求解特徵值(包含阻尼) ,一方面也藉此觀察動態失速在前飛時對旋翼葉片的影響,並尋求物理現象之解釋。而從葉片位移的角度來分析問題,是一個比較具體且具說服力的方式,對於該物理現象有定性及定量的描述。
    An eigen-analysis provides stability information for a rotor system, and it is also an important part of rotor aeroelastic analysis. The resonance phenomenon can be predicted by eigen-analysis as well. In this research, a new three-dimensional wake and nonlinear composite rotor blade flap-lag-torsion coupled model will be developed. The generalized dynamic wake model employed is based on an induced undetermined time dependent coefficients as aerodynamic states. The Galerkin's method and Duncan polynomials are used to expand this nonlinear coupled equation into equilibrium and disturbant parts. The nonlinear phenomenon will be investigated through eigen-analysis, especially for nonlinear resonance. Hopefully, some of the physical meanings behind the nonlinear resonance would be discovered through eigen-value point of view.
    Relation: 第三屆海峽兩岸航空太空學術研討會論文集=CIROC CSCA AASRC Joint Conference,頁AA589-596
    Appears in Collections:[航空太空工程學系暨研究所] 會議論文

    Files in This Item:

    File Description SizeFormat
    懸停時動態失速對旋翼葉片系統之影響_中文摘要.docx摘要15KbMicrosoft Word95View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback