Results 1 to 10 of about 3,355 (227)
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
Coupling-induced instability in a ring of thermoacoustic oscillators. [PDF]
Proc Math Phys Eng Sci, 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.
Pedergnana T, Noiray N.
europepmc +6 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
Experiments and modelling of rate-dependent transition delay in a stochastic subcritical bifurcation. [PDF]
R Soc Open Sci, 2018 Complex systems exhibiting critical transitions when one of their governing parameters varies are ubiquitous in nature and in engineering applications. Despite a vast literature focusing on this topic, there are few studies dealing with the effect of the
Bonciolini G, Ebi D, Boujo E, Noiray N.
europepmc +3 more sources
Aerospace, 2022 Thermoacoustic instabilities occur when heat release is coupled with pressure fluctuation, which may cause performance degradation of the combustor and serious structural damage.
Jiangge Deng
exaly +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
Bifurcation Dodge: Avoidance of a Thermoacoustic Instability under Transient Operation [PDF]
, 2018 Varying one of the governing parameters of a dynamical system may lead to a critical transition, where the new stable state is undesirable. In some cases, there is only a limited range of the bifurcation parameter that corresponds to that unwanted ...
Bonciolini, Giacomo, Noiray, Nicolas
core +2 more sources
Thermoacoustic Instability in Combustors
Annual Review of Fluid MechanicsThermoacoustic instability is a flow instability that arises due to a two-way coupling between acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude oscillations in the combustors of gas turbines, aeroengines, rocket engines, etc., and the transition to decarbonized fuels is likely to introduce new thermoacoustic ...
Aimee S. Morgans, Dong Yang
openalex +3 more sources
Energy and AI, 2021 The intermittent nature of operation and unpredictable availability of renewable sources of energy (e.g., wind and solar) would require the combustors in fossil-fuel power plants, sharing the same grid, to operate with large turn-down ratios. This brings
Sudeepta Mondal +2 more
exaly +3 more sources
Behaviour of a premixed flame subjected to acoustic oscillations. [PDF]
PLoS ONE, 2013 In this paper, a one dimensional premixed laminar methane flame is subjected to acoustic oscillations and studied. The purpose of this analysis is to investigate the effects of acoustic perturbations on the reaction rates of different species, with a ...
Shafiq R Qureshi +2 more
doaj +2 more sources