Thermoacoustic combustion instability is one of the most challenging operational issues in
several high-performance, low-emissions combustion technologies, including gas turbines …

Physics-informed neural networks (PINNs) can be used to solve partial differential equations
(PDEs) and identify hidden variables by incorporating the governing equations into neural …

Motivated by the recent success in finding coherent structures in turbulent flows and
describing their noise emission using the Resolvent Analysis (RA), the method is applied to …

First-order sensitivities and adjoint analysis are used widely to control the linear stability of
unstable flows. Second-order sensitivities have recently helped to increase accuracy. In this …

View Video Presentation: https://doi. org/10.2514/6.2023-3434. vid This manuscript provides
a brief description of the linearized flow solver FELiCS and reviews six applications of the …

The generation and turbulent transport of temporal equivalence ratio fluctuations in a swirl
combustor are experimentally investigated and compared to a one-dimensional transport …

View Video Presentation: https://doi. org/10.2514/6.2023-4351. vid Modeling the coherent
component of the Reynolds stresses to close the linearized mean field equations has …

Unsteady combustion generates not only acoustic waves, but also fluctuations of the burnt
gas temperature—referred to as entropy waves. These waves are convected by the mean …

In this paper, a new method is introduced to model the transport of entropy waves and
equivalence ratio fluctuations in turbulent flows. The model is based on the Navier–Stokes …

The thesis aims to apply recent developments of methodology from the field of linear
instability theory to the study of combustion instability. The flame instability here refers to the …