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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/45988

    Title: Combustion Instability in a Combustion Chamber with a Slit V-Gutter
    Other Titles: 開口V形駐焰器之燃燒不穩定性研究
    Authors: 湯敬民;Tang, Jing-ming;潘國隆;Pan, Kuo-long;顏昌武;Yen, Chang-wu
    Contributors: 淡江大學航空太空工程學系
    Keywords: V形駐焰器;燃燒不穩定性 Combustion instability;Flame holder
    Date: 1999-02-01
    Issue Date: 2013-03-20 16:20:50 (UTC+8)
    Publisher: 臺北市:中國機械工程學會
    Abstract: In this work we experimentally investigated the effect of a slit at the vertex of a V-gutter on combustion instability in the turbulent wake flame. Influences of blow-off mechanisms near both lean and rich limits on the combustion-induced oscillation were also studied. Results showed that a proper slit of the V-gutter could suppress the combustion instability and the flame quenching at low frequency. However, oscillations at higher frequencies might become main sources of combustion instability if the opening was overextended. In the fuel-lean condition, the diverted-jet flame was a stabler heat source and the main instability came from fluctuations of the reacting shear layer. The instability mode was similar to that of a regular V-gutter under the same operating conditions. Near the rich limit, however, it was more difficult for the jet flame to exist in the wake, while the flame was always re-ignited from the shear layer opposite to the jet flow due to a stronger mixing mechanism. Thus, strong oscillations were induced by the unstable heat release both in fuel-lean and fuel-rich conditions with distinct mechanisms.
    Relation: 中國機械工程學刊=Journal of the Chinese Society of Mechanical Engineers 20(1),頁59-65
    Appears in Collections:[Graduate Institute & Department of Aerospace Engineering] Journal Article

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