2019
DOI: 10.1016/j.expthermflusci.2019.03.011
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Burner geometry effect on coherent structures and acoustics of a confined swirling partially premixed methane flame

Abstract: The effect of burner geometry (central fuel nozzle, mixing tube length, and flame confinement) on the ensuing flowfield's coherent structures (precessing vortex core and vortex shedding) and their relationship with some combustion stability parameters, such as flashback and flame front dynamics of a swirling partially premixed methane flame, is experimentally studied. In this investigation, several measurement techniques are employed. These include particle image velocimetry (PIV), Mie scattering, laser Dopple… Show more

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Cited by 9 publications
(2 citation statements)
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“…At inlet air temperature equal to 298 K the distributions present the highest energy contribution in the ranges [78.125Hz -156.25Hz] and [156.25Hz-312.5Hz], however the proximity of blowout, the-frequency content in the range [156.25Hz-312.5Hz] increases. This frequency range is in agreement with previous studies [21,22]. The same behavior is also confirmed in the case of plasma actuation (Fig.…”
Section: Microphone Resultssupporting
confidence: 93%
“…At inlet air temperature equal to 298 K the distributions present the highest energy contribution in the ranges [78.125Hz -156.25Hz] and [156.25Hz-312.5Hz], however the proximity of blowout, the-frequency content in the range [156.25Hz-312.5Hz] increases. This frequency range is in agreement with previous studies [21,22]. The same behavior is also confirmed in the case of plasma actuation (Fig.…”
Section: Microphone Resultssupporting
confidence: 93%
“…Injection mediums such as hydrogen, air, CO 2 , N 2 and O 2 were widely applied for thermoacoustic suppression 6–8 . The bluff body, flow field and the structure of the flame anchoring zone were changed for combustion optimization 9–15 . The combustion kinetics and thermodynamics in the flame anchoring zone can be optimized with a separate injection medium.…”
Section: Introductionmentioning
confidence: 99%