• Azimuthal flame response and symmetry breaking in a forced annular combustor 

      Nygård, Håkon Tormodsen; Ghirardo, Giulio; Worth, Nicholas (Peer reviewed; Journal article, 2021)
      In the current study azimuthal forcing of an annular combustor with swirling flames has been performed to present for the first time the Heat Release Rate (HRR) response to all possible pressure fields of the first azimuthal ...
    • Effect of noise and nonlinearities on thermoacoustics of can-annular combustors 

      Ghirardo, Giulio; Moeck, Jonas; Bothien, Mirko R. (Peer reviewed; Journal article, 2020)
      Can-annular combustors consist of N distinct cans setup symmetrically around the axis of the gas turbine. Each can is connected to the turbine inlet by means of a transition duct. At the turbine inlet, a small gap between ...
    • Saturation of flames to multiple inputs at one frequency 

      Nygård, Håkon Tormodsen; Ghirardo, Giulio; Worth, Nicholas Alexander (Peer reviewed; Journal article, 2023)
      Existing experimental results show that swirling flames in annular combustors respond with a different gain to acoustic azimuthal modes rotating in either the clockwise or anti-clockwise direction. The ratio R of these two ...
    • 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, ...