Browsing NTNU Open by Author "Ahn, Byeonguk"
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The effect of hydrogen addition on the amplitude and harmonic response of azimuthal instabilities in a pressurized annular combustor
Indlekofer, Thomas; Ahn, Byeonguk; Kwah, Yi Hao; Wiseman, Samuel; Mazur, Marek; Dawson, James; Worth, Nicholas (Peer reviewed; Journal article, 2021)The present work introduces an annular combustion chamber operated at intermediate pressures. The combustor is operated with CH-H blends leading to a variety of azimuthal combustion instabilities. The influence of the ... -
The Effect of Rectangular Confinement Aspect Ratio On the Flame Transfer Function of a Turbulent Swirling Flame
Ånestad, Aksel; Ahn, Byeonguk; Nygård, Håkon Tormodsen; Worth, Nicholas (Peer reviewed; Journal article, 2022)The flame transfer function (FTF) has been experimentally investigated for a premixed, turbulent and highly swirled flame in rectangular enclosures with varying aspect ratio. A range of equivalence ratios and inlet bulk ... -
Heat release rate response of azimuthal thermoacoustic instabilities in a pressurized annular combustor with methane/hydrogen flames
Ahn, Byeonguk; Indlekofer, Thomas; Dawson, James; Worth, Nicholas (Journal article; Peer reviewed, 2022)In this study, the heat release rate (HRR) response during self-excited azimuthal thermoacoustic instabilities in a pressurized annular combustor is investigated for hydrogen/methane blended flames. The equivalence ratio ... -
Transient Thermo-Acoustic Responses of Methane/Hydrogen Flames in a Pressurized Annular Combustor
Ahn, Byeonguk; Indlekofer, Thomas; Dawson, James; Worth, Nicholas (Peer reviewed; Journal article, 2022)The present article experimentally investigates the triggering and transient growth of azimuthal instabilities in a pressurized laboratory-scale annular combustor featuring 12 methane/hydrogen flames, as the equivalence ...