Krylov methods for large-scale dynamical systems: Application in fluid dynamics
RAS Frantz, JC Loiseau… - Applied …, 2023 - asmedigitalcollection.asme.org
In fluid dynamics, predicting and characterizing bifurcations, from the onset of unsteadiness
to the transition to turbulence, is of critical importance for both academic and industrial …
to the transition to turbulence, is of critical importance for both academic and industrial …
Modelling the response of a turbulent jet flame to acoustic forcing in a linearized framework using an active flame approach
This study performs a linear mean field analysis of a turbulent reacting methane-air jet flame,
with the goal of predicting the response of the reacting flow to upstream acoustic actuation …
with the goal of predicting the response of the reacting flow to upstream acoustic actuation …
Mean field coupling mechanisms explaining the impact of the precessing vortex core on the flame transfer function
The flame transfer functions (FTF) is a key quantity to assess the thermoacoustic properties
of combustion systems. It is known to depend on the hydrodynamic instabilities of the …
of combustion systems. It is known to depend on the hydrodynamic instabilities of the …
FELiCS: a versatile linearized solver addressing dynamics in multi-physics flows
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 …
a brief description of the linearized flow solver FELiCS and reviews six applications of the …
Receptivity of the turbulent precessing vortex core: synchronization experiments and global adjoint linear stability analysis
The precessing vortex core (PVC) is a coherent structure that can arise in swirling jets from a
global instability. In this work, the PVC is investigated under highly turbulent conditions. The …
global instability. In this work, the PVC is investigated under highly turbulent conditions. The …
Phase-opposition control of the precessing vortex core in turbulent swirl flames for investigation of mixing and flame stability
The precessing vortex core (PVC) is a helically shaped coherent flow structure that occurs in
reacting and nonreacting swirling flows undergoing vortex breakdown. In swirl-stabilized …
reacting and nonreacting swirling flows undergoing vortex breakdown. In swirl-stabilized …
Excitation of the precessing vortex core by active flow control to suppress thermoacoustic instabilities in swirl flames
F Lückoff, K Oberleithner - International Journal of Spray and …, 2019 - journals.sagepub.com
In this study, we apply periodic flow excitation of the precessing vortex core at the
centerbody of a swirl-stabilized combustor to investigate the impact of the precessing vortex …
centerbody of a swirl-stabilized combustor to investigate the impact of the precessing vortex …
On the relevance of the runner crown for flow instabilities in a Francis turbine
The precessing vortex core (PVC), also known as vortex rope, in a draft tube of a Francis-99
hydro turbine is investigated. The goal is to increase our comprehension of the root of the …
hydro turbine is investigated. The goal is to increase our comprehension of the root of the …
Prediction of the flow response of a turbulent flame to acoustic pertubations based on mean flow resolvent analysis
TL Kaiser, L Lesshafft… - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
Resolvent analysis is applied to a nonreacting and a reacting swirled jet flow. Time-
averaged flows as input for the resolvent analysis and validation for the results of the …
averaged flows as input for the resolvent analysis and validation for the results of the …
Interacting Linear Modes in the Turbulent Flow of an Industrial Swirled Combustor
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 …
vortices, also known as precessing vortex cores, which dominate the flow dynamics. This …