• 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 ...
    • Experimental Study of Damper Position on Instabilities in an Annular Combustor 

      Mazur, Marek; Nygård, Håkon Tormodsen; Dawson, James; Worth, Nicholas (Conference object, 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, ...
    • Symmetry breaking modelling for azimuthal combustion dynamics 

      Ghirardo, Giulio; Nygård, Håkon Tormodsen; Cuquel, Alexis; Worth, Nicholas (Peer reviewed; Journal article, 2020)
      Annular combustors can exhibit azimuthal thermoacoustic instabilities, which can rotate as a spinning wave at the speed of sound in the azimuthal direction, oscillate as a standing wave with pressure nodes fixed in space, ...
    • Two Dimensional Fiber Bundle Bridge Model 

      Nygård, Håkon Tormodsen (Master thesis, 2016)
      The two dimensional fiber bundle bridge model is introduced, derived and studied for an uniform threshold distribution. The model is independent of history and has an adjustable effective range of interaction, which is ...