We model acoustic oscillations driven by velocity-coupled heat release rate fluctuations. We
obtain an inhomogeneous wave equation and convert it to the frequency domain with a …

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 …

Swirled flows often feature global modes that become manifest as skew-symmetric helical
vortices, also known as precessing vortex cores, which dominate the flow dynamics. This …

This paper investigates the amplification and propagation of swirl fluctuations in turbulent
swirling flows using resolvent analysis. Swirl fluctuations have been repeatedly observed in …

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 …

We investigate self-excited axisymmetric oscillations of a lean premixed methane--air V-
flame in a laminar annular jet. The flame is anchored near the rim of the centrebody, forming …

Linearizing the governing equations of reacting turbulent flows would allow to significantly
enhance the understanding of thermoacoustic instabilities and provide new efficient ways to …