Coupling-induced instability in a ring of thermoacoustic oscillators [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022 Thermoacoustic instabilities in can-annular combus-tors of stationary gas turbines lead to unstable Bloch modes which appear as rotating acoustic pressure waves along the turbine annulus. The multiscale, multiphysical nature of the full problem makes a detailed analysis challenging.
Nicolas Noiray
exaly +7 more sources
Development of closed-loop active control method for suppression of thermoacoustic instability using radial air micro-jets [PDF]
MethodsX, 2023 Thermoacoustic instabilities present in the combustor of power producing devices are having adverse effects on the performance. To avoid thermoacoustic instabilities, design of control method is very much essential.
Nilaj Deshmukh +5 more
doaj +2 more sources
Preventing a global transition to thermoacoustic instability by targeting local dynamics [PDF]
Scientific Reports, 2022 The burning of fossil fuels to generate power produces harmful emissions. Lowering such emissions in gas turbine engines is possible by operating them at fuel-lean conditions.
Nitin Babu George +5 more
doaj +2 more sources
Experimental Study of Flame Dynamics in a Triple-Injector Swirling Nonpremixed Combustor Under Different Thermoacoustic Self-Excited Instability Modes [PDF]
SensorsCombustion instability is one of the prominent and unavoidable problems in the design of high-performance propulsion systems. This study investigates the heat release rate (HRR) responses in a triple-nozzle swirling nonpremixed combustor under various ...
Xiang Zhang, Suofang Wang, Yong Liu
doaj +2 more sources
Numerical Study on the Route of Flame-Induced Thermoacoustic Instability in a Rijke Burner
Applied Sciences, 2021 The self-excited thermoacoustic instability in a two-dimensional Rijke-type burner with a center-stabilized premixed methane–air flame is numerically studied.
Nannan Dang +2 more
doaj +3 more sources
Experimental Investigation on Self-Excited Thermoacoustic Instability in a Rijke Tube
Applied Sciences, 2022 The experimental investigations into the thermoacoustic instability in a Rijke tube are presented. In order to capture the dynamics of the temperature, a single-ended tunable diode laser absorption spectroscopy (TDLAS) technique was developed, with a ...
Liezhao Luo +5 more
doaj +3 more sources
Aerospace, 2021 In the present work, 3D Unsteady Reynolds-Averaged Navier-Stokes (URANS) simulations are performed to investigate the generation and mitigation mechanism of combustion-sustained thermoacoustic instabilities in a modelled swirl combustor.
Yuze Sun, Dan Zhao, Xiaowei Zhu
doaj +3 more sources
Bayesian Nonparametric Modeling of Categorical Data for Information Fusion and Causal Inference [PDF]
Entropy, 2018 This paper presents a nonparametric regression model of categorical time series in the setting of conditional tensor factorization and Bayes network. The underlying algorithms are developed to provide a flexible and parsimonious representation for fusion
Sihan Xiong, Yiwei Fu, Asok Ray
doaj +2 more sources
AerospaceThis paper investigates the role of chaotic analysis and deep learning models in combustion instability predictions. To detect the precursors of impending thermoacoustic instability (TAI) in a swirled combustor with various fuel injection strategies, a ...
Boqi Xu +6 more
doaj +3 more sources
Averaging of thermoacoustic azimuthal instabilities [PDF]
Journal of Sound and Vibration, 2021 Journal of Sound and Vibration (2020)
Ghirardo, G., Gant, F.
openaire +2 more sources