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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/96283

    Title: Investigation of the Rich Limit of Operation of Helmholtz Type Pulse Combustor
    Authors: Tang, Jing-Min
    Contributors: 淡江大學航空太空工程學系
    Keywords: 脈動燃燒器;熱釋放率;富油極限;驅動力;壓力振盪;操作條件;Pulse Combustor;Heat Release Rate;Rich Limit;Driving Force;Pressure Oscillation;Operation Condition
    Date: 1994-03
    Issue Date: 2014-03-07
    Abstract: The work presented in this paper is part of an investigation into the operating characteristics of natural gas fired, valved, Helmholtz type, pulse combustors. This article presents some experimental results that describes the controlling mechanisms which control the existence of a rich limit of operation of the pulse combustor. Acoustic pressure oscillations and the global heat release rates were measured to determine how they and their correlation determine the performance of the pulse combustor. Experimental results indicate that the combustion induced driving force near the lean limit is barely larger than the damping of the system. This is due to the relatively large phase difference between the heat release and pressure oscillations under these operating conditions. Near the rich limit (i.e., near .phi.=1), on the other hand, pressure and heat release fluctuations are nearly in phase. Therefore, the driving force is relatively high. Nevertheless, a rich limit of operation is reached. The investigation has shown that this limit is reached because when operating near the stoichiometric ratio, the rapidly entering air jet quenches the ignition source (i.e. reacting gas pockets) left over from the previous cycle.
    Relation: 中華民國第四屆燃燒科技應用研討會論文集=Proceedings of the Fourth National Conference on Combustion Science and=Technology,頁41279
    Appears in Collections:[航空太空工程學系暨研究所] 會議論文

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