Modeling Premixed Flame Response to Transverse Acoustic Modes

VS Acharya, TC Lieuwen - 2018 AIAA Aerospace Sciences Meeting, 2018 - arc.aiaa.org
HIS paper focuses on the direct response of premixed flames to transverse acoustic
oscillations in a cylindrical can combustor. The drive towards lower NOx emissions has …

Premixed Flame Response to High-Frequency Transverse Acoustic Modes: Mean Flame Asymmetry Effects

VS Acharya, TC Lieuwen - AIAA Scitech 2019 Forum, 2019 - arc.aiaa.org
HIS paper considers the response of premixed flames to the direct acoustic velocity
fluctations that are associated with transverse acoustic modes of a cylindrical can …

High frequency premixed flame response to acoustic perturbations

S Shreekrishna, T Lieuwen - 15th AIAA/CEAS Aeroacoustics …, 2009 - arc.aiaa.org
HIS paper describes the high frequency heat release response of laminar premixed flames
to perturbations in acoustic pressure, velocity and equivalence ratio. This work is motivated …

Influence of rotational asymmetry on thermoacoustic instabilities in a can-annular lean-premixed combustor

K Moon, C Yoon, KT Kim - Combustion and Flame, 2021 - Elsevier
Low-frequency combustion instabilities, and ultimately, engine-level dynamics in can-
annular gas turbine combustion systems, are driven by acoustic interactions between …

Transverse to longitudinal acoustic coupling processes in annular combustion chambers

J Blimbaum, M Zanchetta, T Akin… - … journal of spray …, 2012 - journals.sagepub.com
Combustion instability is a major issue facing lean, premixed combustion approaches in
modern gas turbine applications. This paper specifically focuses on instabilities that excite …

Forced response of premixed flames: Effect of flow non-uniformity

P Preetham, S Hemchandra, T Lieuwen - 46th AIAA Aerospace …, 2008 - arc.aiaa.org
Low emissions combustion systems utilize a premixed combustion process that is prone to
combustion instability1-3. This phenomenon occurs when the unsteady combustion process …

Sensitivity Studies of Premixed Flame Response to Transverse, High Frequency Disturbances

VS Acharya, TC Lieuwen - AIAA Scitech 2020 Forum, 2020 - arc.aiaa.org
This study analyzes the response of premixed flames to high frequency transverse acoustic
disturbances. A significant body of experiment, modeling and simulation efforts has been …

Modeling and dynamics of nonlinear acoustic waves in a combustion chamber

N Ananthkrishnan, S Deo, F Culick - 38th AIAA/ASME/SAE/ASEE Joint …, 2002 - arc.aiaa.org
Future combustors designed for better efficiency and lower pollutant emission are expected
to operate closer to their stability boundary, thereby increasing the risk of encountering …

Nonlinear interactions between driven and self-excited acoustic oscillations in a premixed combustor

B Bellows, A Hreiz, T Lieuwen - 44th AIAA Aerospace Sciences …, 2006 - arc.aiaa.org
This paper describes an experimental investigation of the nonlinear interactions between
self-excited and driven oscillations in a premixed swirl-stabilized combustor. This interaction …

Low-order modelling of the response of ducted flames in annular geometries

OS Graham, AP Dowling - … Expo: Power for …, 2012 - asmedigitalcollection.asme.org
The adoption of lean premixed prevaporised combustion systems can reduce NOx
emissions from gas turbines, but unfortunately also increases their susceptibility to …