Results 11 to 20 of about 108,068 (160)

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, Afzal Ansari, Praseed Kumar, Allen Varghese George, Febin Joseph Thomas, Merick Steve George   +5 more
doaj   +3 more sources

Experimental Study of Suppressing the Thermoacoustic Instabilities in a Rijke Tube Using Microsecond Discharge Plasma

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, Ting Li, Jinkui Wang, Chicheng Gao   +3 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]

Sensors
Combustion 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

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

Offline reinforcement learning for mitigating thermoacoustic instabilities in a laminar premixed flame

Applications in Energy and Combustion Science
Thermoacoustic instabilities pose a significant challenge in combustion applications, leading to potential damage to rocket engines and gas turbines. Among various mitigation strategies, active control has been explored as a mean to decouple acoustics ...
Juan Camilo Giraldo Delgado, Qi Wang, S. Mani Sarathy   +2 more
doaj   +2 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, Waqar A Khan, Robert Prosser   +2 more
doaj   +2 more sources

Emerging topics in nanophononics and elastic, acoustic, and mechanical metamaterials: an overview. [PDF]

Nanophotonics, 2023
Abstract This broad review summarizes recent advances and “hot” research topics in nanophononics and elastic, acoustic, and mechanical metamaterials based on results presented by the authors at the EUROMECH 610 Colloquium held on April 25–27, 2022 in Benicássim, Spain.
Krushynska AO, Torrent D, Aragón AM, Ardito R, Bilal OR, Bonello B, Bosia F, Chen Y, Christensen J, Colombi A, Cummer SA, Djafari-Rouhani B, Fraternali F, Galich PI, Garcia PD, Groby JP, Guenneau S, Haberman MR, Hussein MI, Janbaz S, Jiménez N, Khelif A, Laude V, Mirzaali MJ, Packo P, Palermo A, Pennec Y, Picó R, López MR, Rudykh S, Serra-Garcia M, Sotomayor Torres CM, Starkey TA, Tournat V, Wright OB.   +34 more
europepmc   +2 more sources

Generation and Mitigation Mechanism Studies of Nonlinear Thermoacoustic Instability in a Modelled Swirling Combustor with a Heat Exchanger

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   +1 more source

Transfer learning of deep neural networks for predicting thermoacoustic instabilities in combustion systems

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, Ashesh Chattopadhyay, Achintya Mukhopadhyay, Asok Ray   +3 more
doaj   +1 more source

Experimental Investigation of Stochastically Forced Rijke-Type Supercritical Thermoacoustic Systems

Energies, 2023
Intense thermoacoustic oscillations may lead to severe deterioration due to the induced intolerable damage to combustors. A better understanding of unstable behaviors is important to prevent or suppress these oscillations.
Hao Zhang, Yuanhao Wang, Xinyan Li, Geng Chen, Yuze Sun   +4 more
doaj   +1 more source