English  |  正體中文  |  简体中文  |  Items with full text/Total items : 63190/95884 (66%)
Visitors : 4640107      Online Users : 373
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: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/96326

    Title: 固體火箭預混火焰誘導聲波振盪之研究
    Other Titles: Investigations of Sound Generation by Simulated Solid Rocket Premixed Flames
    Authors: 陳增源;李新成
    Contributors: 淡江大學航空太空工程學系
    Keywords: 固體火箭;預混火焰;火焰輻射;聲波振盪;當量比;頻率;燃燒不穩定;Solid Rocket;Premixed Flame;Flame Radiation;Acoustic Oscillation;Equivalence Ratio;Frequency;Combustion Instability
    Date: 1993-03
    Issue Date: 2014-03-07 09:08:21 (UTC+8)
    Abstract: 此研究是描述預混火焰聲波振盪之情況以 探討固體火箭燃燒不穩定之問題。探討主題為 火焰之輻射量測及火焰所激發之聲波振盪。研 究結果發現,在某些當量比之下,會產生週期性 的火焰輻射及壓力振盪;且火焰以多頻振盪,其振盪的主頻率與壓力振盪的主頻率可能不同。 火焰輻射之振盪頻率隨當量比之減少而減低, 同時,聲波場之存在並不影響火焰之振盪。火 焰激發之聲波振盪會因振盪頻率不同而產生加 強或減弱之現象。當聲波振盪之頻率與實驗長 管之自然頻率接近時,有加強聲波場之現象;反 之,則聲波振盪會被減弱。
    This research is concerned with the study of sound generation by simulated solid rocket premixed flames located on the sidewall of a long rectangular duct. Specifically, the flame radiation, i.e., light emission, of the flame and the induced acoustic oscillation were investigated. These studies reveal that the self-excited oscillatory flame radiation and the induced pressure oscillation were observed only at certain equivalence ratios. In addition, the flame oscillates with several frequencies and the dominating frequency can be different from that of the induced pressure oscillations. The frequencies of the flame oscillation decreased as the equivalence ratio decreased, and were not affected by the presence of acoustic wave. However, the acoustic oscillations could be enhanced or damped by the flame oscillation depending on the frequency of the oscillations. Driving of acoustic wave occurred when the frequencies of the induced acoustic wave are close to the harmonics of the experimental duct. On the other hand, the acoustic oscillations were damped when the frequencies of the pressure oscillations are away from the harmonics of the duct.
    Relation: 中華民國第三屆燃燒科技應用研討會論文集=Proceedings of the Third National Conference on Combustion Science and T=echnology,頁73-78
    Appears in Collections:[Graduate Institute & Department of Aerospace Engineering] Proceeding

    Files in This Item:

    File Description SizeFormat
    固體火箭預混火焰誘導聲波振盪之研究_中文摘要.docx摘要14KbMicrosoft Word153View/Open
    固體火箭預混火焰誘導聲波振盪之研究_西文摘要.docx摘要14KbMicrosoft Word92View/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