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    Experimental analysis of the effects of the bulk flow velocity on the flame transfer function of premixed swirl flames

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    Type
    Conference Paper
    Authors
    Sabatino, Francesco Di
    Guiberti, Thibault cc
    Moeck, Jonas P.
    Roberts, William L. cc
    Lacoste, Deanna cc
    KAUST Department
    King Abdullah University of Science and Technology (KAUST), Clean Combustion Research Center, Thuwal, 23955-6900, Saudi Arabia
    Clean Combustion Research Center
    Physical Science and Engineering (PSE) Division
    Mechanical Engineering Program
    Date
    2019-01-01
    Permanent link to this record
    http://hdl.handle.net/10754/666474
    
    Metadata
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    Abstract
    A study on how the bulk flow velocity ( ) affects the flame transfer function (FTF) of premixed swirl flames is carried out. The experimental apparatus comprises a swirl-stabilized burner and a loudspeaker system to acoustically force the flame. The diagnostics include a hot wire probe to measure the velocity, a photomultiplier tube to collect OH* chemiluminescence of the flame, and a camera to acquire direct images of the flame. Two fuels, methane and propane, and four values of for each fuel are analyzed. The gain of the FTF for the two fuels shows the characteristic trend for swirl flames: a series of local maxima and minima. On the other hand, the FTF phase increases with increasing forcing frequency. Increasing , the frequency of the second local maximum of the gain increases while its magnitude remains almost constant for both fuels. Moreover, the phase increases when is increased. The stabilization distance, or the flame base angle, is constant when is increased, resulting in a constant value of the gain at the frequency around the second local maximum. On the other hand, the flame height is observed to control the trend of the phase with increasing.
    Sponsors
    This work is funded by the King Abdullah University of Science and Technology and by the Deutsche Forschungsgemeinschaft through the GECCO project.
    Publisher
    Combustion Institute
    Conference/Event name
    12th Asia-Pacific Conference on Combustion, ASPACC 2019
    Additional Links
    http://www.combustionsociety.jp/aspacc19/program_final0711.html#CH0238
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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