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 …

Transient dynamics of the precessing vortex core in an intermittently shape-transitioning swirl flame

J Zhang, X Hui, Q An, AM Steinberg - Combustion and Flame, 2023 - Elsevier
The transient dynamics of the precessing vortex core (PVC), a globally unstable mode, in an
intermittently shape-transitioning swirl flame is investigated by means of simultaneous OH …

Absolute instabilities and dynamics of helical vortices in twin annular swirling jets

J Zhang, X Hui, Q An, X Han, C Wang - Physics of Fluids, 2023 - pubs.aip.org
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 …

Asynchronous and synchronous quenching of a globally unstable jet via axisymmetry breaking

AK Kushwaha, NA Worth, JR Dawson… - Journal of Fluid …, 2022 - cambridge.org
We explore experimentally whether axisymmetry breaking can be exploited for the open-
loop control of a prototypical hydrodynamic oscillator, namely a low-density inertial jet …

Simultaneous visualization of instantaneous unburnt and preheating zones in turbulent premixed flames under transverse acoustic excitations

B Yan, Y Sun, M Sun, G Wu, C Gong, M Wan, Y Tian… - Physics of …, 2022 - pubs.aip.org
Instantaneous unburnt and preheating zones of bluff-body stabilized turbulent premixed
flames under transverse acoustic excitations were investigated using simultaneous planar …

Onset of global instability in a premixed annular V-flame

C Wang, CM Douglas, Y Guan, C Xu… - arXiv preprint arXiv …, 2024 - arxiv.org
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 …

Global analysis of linear flame instability

C Wang - 2022 - theses.hal.science
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 …

Optimum Injector Parameters for Thermoacoustic Stability in a Multi-Nozzle Can Combustion System

V Acharya - Turbo Expo: Power for Land, Sea, and …, 2022 - asmedigitalcollection.asme.org
High-frequency transverse instabilities are an important concern in can combustor
configurations. In these configurations which are typically operated with multiple injectors …

[引用][C] Global linear analysis of flame instability

C WANG - 2022 - Georgia Institute of Technology