Acoustic modes in combustors with complex impedances and multidimensional active flames

By Franck Nicoud, L. Benoit, C. Sensiau, Thierry Poinsot. 2007

361 citations recorded by the source corpus.

Subfields: Aerospace Engineering, Computational Mechanics

View Paper: https://www.semanticscholar.org/paper/afbc02919b9361c7747c067dc37a62431cbc721b

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In Aerospace Engineering

In Computational Mechanics

Citations in the corpus

Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers (2012, methodology): “A second difficulty is to take into account the complexity of the geometry [29, 30] which leads to a very large number of possible acoustic modes.”
Investigation of azimuthal staging concepts in annular gas turbines (2011, background): “[4], the Helmholtz equation is solved with a nonuniform source term at the flame scale; the focus here is to investigate the influence of a distributed source at the combustor scale.”
Triggering in the horizontal Rijke tube: non-normality, transient growth and bypass transition (2010, background): “This is a general feature of eigenvectors in thermoacoustics (Nicoud et al. 2007), and means that some initial states are composed of eigenfunctions with large amplitudes that largely cancel out. If the eigenfunctions of such states decay at different rates, the states grow initially even if all the”
Sensitivity and Nonlinearity of Thermoacoustic Oscillations (2018, methodology): “Higher-order terms capture spatial variations in phase, which can be modeled heuristically by setting n and τ to be functions of space (Nicoud et al. 2007).”
Combining a Helmholtz solver with the flame describing function to assess combustion instability in a premixed swirled combustor (2013, methodology): “Also, the FTF can be combined to numerical tools which are used to solve the wave equation, usually expressed in the frequency domain (Roux et al., 2005; Nicoud et al., 2007; Camporeale et al., 2011).”