English  |  正體中文  |  简体中文  |  Items with full text/Total items : 52047/87178 (60%)
Visitors : 8677132      Online Users : 70
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/987654321/35607

    Title: 積冰現象之空氣動力特性分析-以ATR-72 為例
    Other Titles: Aircraft aerodynamic analysis of ATR-72 under ice accretion condition
    Authors: 朱家輝;Chu, Jia-hui
    Contributors: 淡江大學航空太空工程學系碩士班
    宛同;Wan, Tung
    Keywords: 積冰;空氣動力分析;水滴運動方程式;Ice accretion;Droplet motion equation;Aerodynamic analysis
    Date: 2008
    Issue Date: 2010-01-11 06:51:41 (UTC+8)
    Abstract: 2002年12月21日,復興航空GE-791貨機,因遭遇積冰問題而失事墜毀
    (Glaze Ice)與透明冰(Clear Ice)兩種不同積冰於主翼及水平尾翼上作堆
    The Trans Asia Airway flight GE-791, an ATR-72 airplane
    encountered ice accretion to crash at Peng Hu Island, Taiwan, December
    21, 2002, was the first ice accretion accident case ever in Taiwan. This
    thesis is based on Aviation Safety Council accident report, and taking
    GE791 as the case for numerically simulating aerodynamic coefficients
    of main wing and horizontal tail under several two-dimensional icing
    This study uses existing CFD method to predict the ice accretion on
    airfoil. First step is the generation of unstructured grid on the wing and
    tail configurations. Secondly, solve Navier-Stokes equation with finite
    volume method. Finally, the equation of motion for supercooled water
    droplets is implemented for ice accumulation production on the airfoil
    leading edge locations. Considering the ATR-72 has distinctive T-tail
    shape, it is assumed that the tail will not influenced by the main wing
    trailing vortices, thus the glaze ice and clear ice can be simulated under
    proper atmospheric conditions. The two-dimensional iced airfoil shapes
    are achieved, and the results are extended to three-dimensional and then
    use the flight mechanics software DATCOM to analyze the aircraft
    performance behavior.
    According to the above research, in two-dimensional the airfoil ice
    shape is more anomalous; their lift coefficients will hastily decreasing
    and drag coefficient will increase. In addition, the ice accretion
    phenomenon will cause the horizontal tail to stall ahead of time. When
    tail stalls, this downward force is lessened or removed, and nose of the
    airplane can severely pitch down, this leads to threaten of flight safety
    and is the major cause of ATR-72 accident. On the other hand the
    DATCOM is an aircraft preliminary design tool, so it has error in
    analyzing complicated ice shapes. There are still major rooms for
    improvement in prediction of actual airplane flight performance through
    this software.
    Appears in Collections:[航空太空工程學系暨研究所] 學位論文

    Files in This Item:

    File SizeFormat

    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