Results 81 to 90 of about 787,947 (227)
International Journal of Aerospace Engineering, 2019 The stability of a combustion chamber with a gas-centered swirl coaxial injector is investigated over a wide range of operating conditions in the aspect of thermoacoustic instabilities. First, flame shapes induced by the injector are analyzed for various
Yong Ho Min +2 more
doaj +1 more source
Nonlinear self-excited thermoacoustic oscillations of a ducted premixed flame: Bifurcations and routes to chaos [PDF]
, 2014 Thermoacoustic systems can oscillate self-excitedly, and often non-periodically, owing to coupling between unsteady heat release and acoustic waves. We study a slot-stabilized two-dimensional premixed flame in a duct via numerical simulations of a $G ...
Juniper, MP, Kashinath, K, Waugh, IC
core +1 more source
Learning and Characterizing Chaotic Attractors of a Lean Premixed Combustor
EnergiesThis paper is about the characteristics of and a method to recognize the onset of limit cycle thermoacoustic oscillations in a gas turbine-like combustor with a premixed turbulent methane/air flame.
Sara Navarro-Arredondo, Jim B. W. Kok
doaj +1 more source
Study on thermoacoustic instabilities in an aircraft engine combustor using 1D network model
Case Studies in Thermal EngineeringThe purpose of this study was to evaluate the combustion instability characteristics of target aircraft combustors under development using network thermoacoustic (TA) models.
Juchan Son +3 more
doaj +1 more source
Uncertainty Management in Thermoacoustic Instability Analysis [PDF]
, 2021 The present thesis focuses on developing a comprehensive uncertainty management framework for quantifying and mitigating the thermoacoustic modal instability risk. Advanced dimensionality reduction and surrogate modeling strategies are proposed, which allow efficiently and accurately handling high-dimensional uncertain inputs.
openaire
EnergiesIn combustor systems, thermoacoustic instabilities may occur and must be avoided for reliable operation. An acoustic network model can be used to predict the eigenfrequencies of the instabilities and the growth rate by incorporating the combustion ...
Mehmet Kapucu +2 more
doaj +1 more source
Time domain modelling and stability analysis of complex thermoacoustic systems [PDF]
, 2007 Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Bothien, Mirko R. +3 more
core +1 more source
Acoustic Energy Balance During the Onset, Growth, and Saturation of Thermoacoustic Instabilities
Journal of Engineering For Gas Turbines and Power, 2020 Thermoacoustic instabilities can occur in a wide range of combustors and are prejudicial since they can lead to increased mechanical fatigue or even catastrophic failure.
R. Gaudron, Dong Yang, A. Morgans
semanticscholar +1 more source
Flame macrostructures and thermoacoustic instabilities in stratified swirling flames
Proceedings of the Combustion Institute, 2019 The present article investigates the correlation between flame macrostructures and thermoacoustic combustion instabilities in stratified swirling flames.
X. Han +5 more
semanticscholar +1 more source
Mixed acoustic–entropy combustion instabilities in gas turbines [PDF]
, 2014 A combustion instability in a combustor terminated by a nozzle is analysed and modelled based on a low-order Helmholtz solver. A large eddy simulation (LES) of the corresponding turbulent, compressible and reacting flow is first performed and analysed ...
Motheau, Emmanuel +2 more
core +3 more sources