Non-modal perturbation growth in a laminar jet: an experimental study
It is known that, apart from the growth of instability modes, the non-modal (algebraic)
mechanism of linear growth plays an important role in near-wall flows. In unbounded flows …
mechanism of linear growth plays an important role in near-wall flows. In unbounded flows …
Scalable resolvent analysis for three-dimensional flows
Resolvent analysis is a powerful tool for studying coherent structures in turbulent flows.
However, its application beyond canonical flows with symmetries that can be used to …
However, its application beyond canonical flows with symmetries that can be used to …
Dynamics and bifurcations of laminar annular swirling and non-swirling jets
CM Douglas, BL Emerson, TC Lieuwen - Journal of Fluid Mechanics, 2022 - cambridge.org
This paper presents bifurcation analyses characterising the nonlinear dynamics of fully
developed laminar annular jets with respect to the centrebody diameter is increased …
developed laminar annular jets with respect to the centrebody diameter is increased …
Effect of a flight stream on subsonic turbulent jets
This study concerns a turbulent jet at Mach number M j= 0.9, subject to a uniform external
flow stream at M f= 0.15. The analysis combines experimental and numerical databases …
flow stream at M f= 0.15. The analysis combines experimental and numerical databases …
Absolute instabilities and dynamics of helical vortices in twin annular swirling jets
Modern low-emissions gas turbine combustors commonly employ a twin annular swirling
flow configuration that consists of a central annular inner jet and a surrounding annular outer …
flow configuration that consists of a central annular inner jet and a surrounding annular outer …
The effect of flight on a turbulent jet: coherent structure eduction and resolvent analysis
We study coherent structures in subsonic turbulent jets subject to a flight stream. A thorough
characterisation of the effects of a flight stream on the turbulent field was recently performed …
characterisation of the effects of a flight stream on the turbulent field was recently performed …
Jet-noise reduction by streak-generating tabs
FR Amaral, B Hasparyk, A Lebedev… - AIAA AVIATION 2023 …, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-4516. vid This paper reports
aeroacoustic experiments on round jets containing tab elements adhered to the nozzle …
aeroacoustic experiments on round jets containing tab elements adhered to the nozzle …
Optimal disturbances in round submerged jets
DA Ashurov - Physics of Fluids, 2024 - pubs.aip.org
In this paper, optimal growth analysis of spatial disturbances in round submerged jets is
performed. Optimal energy growth is studied for various Reynolds numbers Re and …
performed. Optimal energy growth is studied for various Reynolds numbers Re and …
Transition to chaos in a reduced-order model of a shear layer
AVG Cavalieri, EL Rempel… - Journal of Fluid …, 2022 - cambridge.org
The present work studies the nonlinear dynamics of a shear layer, driven by a body force
and confined between parallel walls, a simplified setting to study transitional and turbulent …
and confined between parallel walls, a simplified setting to study transitional and turbulent …
Impact of density stratification and azimuthal velocity on the growth of coherent structures in a convectively unstable swirl flame
Large-scale coherent structures resulting from hydrodynamic instabilities can interact with
turbulent swirl flames and lead to combustion instabilities. The present work investigates the …
turbulent swirl flames and lead to combustion instabilities. The present work investigates the …