55 citations · 98 across the 5 of their papers we have counts for
9 papers · 1 filter
Whistling of turbulent cavity flows: Self-consistent predictions with the linearized compressible Navier-Stokes equations
Nikolaos Bozikis, Dilara Özev, Nicolas Noiray
A self-consistent saturation model for the prediction of aeroacoustic limit cycles emerging in turbulent low-Mach cavity flows (Re=O(10^5), M\simeq 0.2) is proposed. It predicts th…
Numerical study of ignition and combustion of hydrogen-enriched methane in a sequential combustor
Matteo Impagnatiello, Quentin Malé, Nicolas Noiray
Ignition and combustion behavior in the second stage of a sequential combustor are investigated numerically at atmospheric pressure for pure CH4 fueling and for a CH4/H2 fuel blend…
Symmetry breaking of azimuthal waves: Slow-flow dynamics on the Bloch Sphere
Abel Faure Beaulieu, Nicolas Noiray
Depending on the reflectional and rotational symmetries of annular combustors for aeroengines and gas turbines, self-sustained azimuthal thermoacoustic eigenmodes can be standing,…
Bifurcation Dodge: Avoidance of a Thermoacoustic Instability under Transient Operation
Giacomo Bonciolini, Nicolas Noiray
Varying one of the governing parameters of a dynamical system may lead to a critical transition, where the new stable state is undesirable. In some cases, there is only a limited r…
Combustion regimes in sequential combustors: Flame propagation and autoignition at elevated temperature and pressure
Oliver Schulz, Nicolas Noiray
This numerical study investigates the combustion modes in the second stage of a sequential combustor at atmospheric and high pressure. The sequential burner (SB) features a mixing…
Processing time-series of randomly forced self-oscillators: the example of beer bottle whistling
E. Boujo, C. Bourquard, Y. Xiong +1
We present a model-based, output-only parameter identification method for self-sustained oscillators forced by dynamic noise, which we illustrate experimentally with an aeroacousti…