Intrinsic thermoacoustic instabilities
CF Silva - Progress in Energy and Combustion Science, 2023 - Elsevier
It is accepted that the thermoacoustic behavior of a given combustion system can be
analyzed by investigating how its natural acoustic modes are perturbed by the flame …
analyzed by investigating how its natural acoustic modes are perturbed by the flame …
Adjoint methods as design tools in thermoacoustics
L Magri - Applied Mechanics Reviews, 2019 - asmedigitalcollection.asme.org
In a thermoacoustic system, such as a flame in a combustor, heat release oscillations couple
with acoustic pressure oscillations. If the heat release is sufficiently in phase with the …
with acoustic pressure oscillations. If the heat release is sufficiently in phase with the …
Dynamics and control of premixed combustion systems based on flame transfer and describing functions
This article describes recent progress on premixed flame dynamics interacting with acoustic
waves. Expressions are derived to determine the stability of combustors with respect to …
waves. Expressions are derived to determine the stability of combustors with respect to …
Dual-fuel, dual-swirl burner for the mitigation of thermoacoustic instabilities in turbulent ammonia-hydrogen flames
A Katoch, TF Guiberti, DV de Campos… - Combustion and Flame, 2022 - Elsevier
In this paper, a novel dual-fuel, dual-swirl burner is presented and its potential to mitigate
thermoacoustic coupling for ammonia-hydrogen-air flames is explored. The key feature of …
thermoacoustic coupling for ammonia-hydrogen-air flames is explored. The key feature of …
[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 …
[HTML][HTML] A novel method for stable thermoacoustic system design based on exceptional points-Part II: Application to laminar and turbulent flame configurations
M Casel, A Ghani - Combustion and Flame, 2024 - Elsevier
In this paper, we apply the novel EPTD (Exceptional Point-based Thermoacoustic Design)-
method derived in part I of this study (M. Casel & A. Ghani, Combust. Flame, 2024) to two lab …
method derived in part I of this study (M. Casel & A. Ghani, Combust. Flame, 2024) to two lab …
Thermoacoustic modes of intrinsic and acoustic origin and their interplay with exceptional points
We propose a general classification of all the modes of a given thermoacoustic system into
two sets: one of acoustic origin and one of intrinsic thermoacoustic (ITA) origin. To do this …
two sets: one of acoustic origin and one of intrinsic thermoacoustic (ITA) origin. To do this …
[HTML][HTML] A novel method for stable thermoacoustic system design based on exceptional points-Part I: Conceptualization
M Casel, A Ghani - Combustion and Flame, 2024 - Elsevier
In this conceptual study, we introduce the novel EPTD (Exceptional Point-based
Thermoacoustic Design)-method for the design of stable thermoacoustic systems: dampen …
Thermoacoustic Design)-method for the design of stable thermoacoustic systems: dampen …
The contribution of intrinsic thermoacoustic feedback to combustion noise and resonances of a confined turbulent premixed flame
Abstract The influence of Intrinsic Thermoacoustic (ITA) feedback on the combustion noise
spectrum produced by a confined, turbulent, premixed, swirl flame is investigated. The …
spectrum produced by a confined, turbulent, premixed, swirl flame is investigated. The …
Autoignition flame dynamics in sequential combustors
This numerical study investigates the linear and non-linear flame dynamics in the second
stage of a sequential combustor, with methane fuel injection into vitiated hot gas. It focuses …
stage of a sequential combustor, with methane fuel injection into vitiated hot gas. It focuses …