Browsing NTNU Open by Author "Mazur, Marek"
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Characteristics of self-excited spinning azimuthal modes in an annular combustor with turbulent premixed bluff-body flames
Mazur, Marek; Nygård, Håkon Tormodsen; Dawson, James; Worth, Nicholas (Journal article; Peer reviewed, 2018)In this paper we investigate self-excited azimuthal modes in an annular combustor with turbulent premixed bluff-body stabilised flames. Previous studies have shown that both swirl and equivalence ratio influence modal ... -
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 ... -
Experimental Study of Damper Position on Instabilities in an Annular Combustor
Mazur, Marek; Nygård, Håkon Tormodsen; Dawson, James; Worth, Nicholas (Chapter, 2018)The present study experimentally investigates the effects of different circumferential damper configurations on the instabilities in an annular combustor. The combustor consists of multiple bluff body swirl stabilized ... -
Flame dynamics of azimuthal forced spinning and standing modes in an annular combustor
Nygård, Håkon Tormodsen; Mazur, Marek; Dawson, James; Worth, Nicholas (Journal article; Peer reviewed, 2018)Azimuthal forcing has been applied to flames in a laboratory scale annular combustor in order to accurately control the azimuthal mode of excitation. A new forcing configuration permitted not only the pressure amplitude, ... -
Large eddy simulation of CH4-air and C2H4-air combustion in a model annular gas turbine combustor
Zettervall, Niklas; Worth, Nicholas; Mazur, Marek; Dawson, James; Fureby, Christer (Journal article; Peer reviewed, 2018)Combustion instabilities are one of the major challenges in developing and operating propulsion and power generating gas-turbine engines. More specifically, techniques for managing the increasingly stringent emissions ... -
Self-excited longitudinal and azimuthal modes in a pressurised annular combustor
Mazur, Marek; Kwah, Yi Hao; Indlekofer, Thomas; Dawson, James; Worth, Nicholas (Peer reviewed; Journal article, 2020)A new laboratory scale pressurised annular combustion experiment is introduced and used to generate selfexcited longitudinal and azimuthal instabilities. The experiments are operated at mean pressuresranging from approximately ...