Results 31 to 40 of about 787,947 (227)
A real-time digital twin of azimuthal thermoacoustic instabilities [PDF]
Journal of Fluid MechanicsWhen they occur, azimuthal thermoacoustic oscillations can detrimentally affect the safe operation of gas turbines and aeroengines. We develop a real-time digital twin of azimuthal thermoacoustics of a hydrogen-based annular combustor.
Andrea N'ovoa +3 more
semanticscholar +1 more source
, 2020 We, herein, present a new model based on the framework of synchronization to describe a thermoacoustic system and capture the multiple bifurcations that such a system undergoes.
Saha, Abhishek +3 more
core +1 more source
Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers [PDF]
, 2012 The objectives of this paper are the description of azimuthal instability modes found in annular combus- tion chambers using two numerical tools: (1) Large Eddy Simulation (LES) methods and (2) acoustic solv- ers.
Gicquel, Laurent Y.M. +4 more
core +4 more sources
Accounting for convective effects in zero-Mach-number thermoacoustic models [PDF]
, 2014 This paper presents a methodology to account for some mean-flow effects on thermo-acoustic instabilities when using the zero-Mach-number assumption. It is shown that when a computational domain is represented under the M=0 assumption, a nonzero-Mach ...
Bloxsidge +48 more
core +5 more sources
3D convolutional selective autoencoder for instability detection in combustion systems
Energy and AI, 2021 While analytical solutions of critical (phase) transitions in dynamical systems are abundant for simple nonlinear systems, such analysis remains intractable for real-life dynamical systems. A key example is thermoacoustic instability in combustion, where
Tryambak Gangopadhyay +6 more
doaj +1 more source
Experimental and theoretical investigation of the flashback of a swirling, bluff-body stabilised, premixed flame [PDF]
, 2015 Flashback of an open turbulent, premixed flame in a swirl burner with central bluff-body is considered. The aim is to obtain further understanding of the physical mechanisms responsible for the upstream flame propagation.
Christodoulou, Loizos +3 more
core +1 more source
Simulation of 2-way fluid structure interaction in a 3D model combustor [PDF]
, 2012 The liner of a gas turbine combustor is a very flexible structure that is exposed to the pressure oscillations that occur in the combustor. These pressure oscillations can be of very high amplitude due to thermoacoustic instability, when the fluctuations
Alemela, P.R., Kok, J.B.W., Shahi, M.
core +7 more sources
Thermoacoustic stability prediction using classification algorithms
Data-Centric Engineering, 2022 Predicting the occurrence of thermoacoustic instabilities is of major interest in a variety of engineering applications such as aircraft propulsion, power generation, and industrial heating. Predictive methodologies based on a physical approach have been
Renaud Gaudron, Aimee S. Morgans
doaj +1 more source
On the reflection and transmission of circumferential waves through nozzles [PDF]
, 2015 This paper presents a mathematical model for predicting the propagation of circumferential waves (acoustic, entropy and vorticity waves) through an annular nozzle.
Duran, I, Morgans, AS
core +2 more sources
Fluids, 2022 Convective velocity perturbations (CVPs) are known to play an important role in the response of flames to acoustic perturbations and in thermoacoustic combustion instabilities.
Thomas Steinbacher, Wolfgang Polifke
doaj +1 more source