Thermoacoustic Instability in Combustors
AS Morgans, D Yang - Annual Review of Fluid Mechanics, 2024 - annualreviews.org
Thermoacoustic instability is a flow instability that arises due to a two-way coupling between
acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude …
acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude …
Direct Numerical Simulation of hydrogen combustion at auto-ignitive conditions: Ignition, stability and turbulent reaction-front velocity
Abstract Direct Numerical Simulations (DNS) are performed to investigate the process of
spontaneous ignition of hydrogen flames at laminar, turbulent, adiabatic and non-adiabatic …
spontaneous ignition of hydrogen flames at laminar, turbulent, adiabatic and non-adiabatic …
[HTML][HTML] Numerical study of nitrogen oxides chemistry during plasma assisted combustion in a sequential combustor
Abstract Plasma Assisted Combustion (PAC) is a promising technology to enhance the
combustion of lean mixtures prone to instabilities and flame blow-off. Although many PAC …
combustion of lean mixtures prone to instabilities and flame blow-off. Although many PAC …
[HTML][HTML] Thermoacoustic stabilization of a sequential combustor with ultra-low-power nanosecond repetitively pulsed discharges
This study demonstrates the stabilization of a sequential combustor with Nanosecond
Repetitively Pulsed Discharges (NRPD). Sequential combustors offer advantages such as …
Repetitively Pulsed Discharges (NRPD). Sequential combustors offer advantages such as …
Combustion regimes in sequential combustors: Flame propagation and autoignition at elevated temperature and pressure
This numerical study investigates the combustion modes in the second stage of a sequential
combustor at atmospheric and high pressure. The sequential burner (SB) features a mixing …
combustor at atmospheric and high pressure. The sequential burner (SB) features a mixing …
A combined oscillation cycle involving self-excited thermo-acoustic and hydrodynamic instability mechanisms
D Fredrich, WP Jones, AJ Marquis - Physics of Fluids, 2021 - pubs.aip.org
The paper examines the combined effects of several interacting thermo-acoustic and
hydrodynamic instability mechanisms that are known to influence self-excited combustion …
hydrodynamic instability mechanisms that are known to influence self-excited combustion …
Mode shape-dependent thermoacoustic interactions between a lean-premixed primary flame and an axially-staged transverse reacting jet
Y Choi, KT Kim - Combustion and Flame, 2023 - Elsevier
Axial fuel staging enables elevation of the turbine inlet temperature in advanced heavy-duty
gas turbine combustors to∼ 2000 K, ultimately to achieve more than 65% combined cycle …
gas turbine combustors to∼ 2000 K, ultimately to achieve more than 65% combined cycle …
Autoignition-cascade in the windward mixing layer of a premixed jet in hot vitiated crossflow
This numerical study builds upon the experimental work of Wagner et al., eg [Combust.
Flame 176 (2017)], and focuses on the flame stabilization mechanism of a reactive jet in …
Flame 176 (2017)], and focuses on the flame stabilization mechanism of a reactive jet in …
Thermo-acoustic Instabilities in the PRECCINSTA Combustor Investigated Using a Compressible LES-pdf Approach
D Fredrich, WP Jones, AJ Marquis - Flow, Turbulence and Combustion, 2021 - Springer
This work predicts the evolution of self-excited thermo-acoustic instabilities in a gas turbine
model combustor using large eddy simulation. The applied flow solver is fully compressible …
model combustor using large eddy simulation. The applied flow solver is fully compressible …
On the dispersion of entropy waves in turbulent flows
Predicting and controlling entropy-wave-driven combustion instabilities is challenging,
because the production, advection and dispersion of entropy waves in practical systems is …
because the production, advection and dispersion of entropy waves in practical systems is …