Results 21 to 30 of about 87,409 (197)
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
Non-linearities in the thermoacoustic response of a premixed swirl burner [PDF]
, 2009 PhDLean premixed combustion remains one of the simplest and most effective methods of reducing NOx emissions in industrial gas turbines. Lean premixed flames are however prone to an undesirable side effect known as combustion instability, reducing ...
Hosseini, S. M. Reza
core +4 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 +1 more source
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 +3 more
doaj +1 more source
Neural ODE to model and prognose thermoacoustic instability [PDF]
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2022 Thermoacoustic instability in a reacting flow field is characterized by high amplitude pressure fluctuations driven by a positive coupling between the unsteady heat release rate and the acoustic field of the combustor. In a turbulent flow, the transition of a thermoacoustic system from a state of chaos to periodic oscillations occurs via a state of ...
Jayesh M. Dhadphale +3 more
openaire +5 more sources
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 +4 more
doaj +1 more source
loop-shaping control of azimuthal combustion instabilities in annular combustors
Journal of Low Frequency Noise, Vibration and Active Control, 2021 Lean combustion technique and annular geometries are preferred in aero-engines and gas turbines, which however may lead to azimuthal combustion instabilities. Active control can be used to stabilize combustion instabilities.
Sheng Feng, Jingxuan Li
doaj +1 more source
Monitoring Preferential Flow of Water in Sand Using Thermoacoustics Wave Imaging
Geophysical Research Letters, Volume 50, Issue 21, 16 November 2023., 2023 Abstract Accurate predictions of fluid flow, mass transport, and reaction rates critically impact the efficiency and reliability of subsurface exploration and sustainable use of subsurface resources. Quantitative dynamical sensing and imaging can play a pivotal role in the ability to make such predictions.
Chang Liu +6 more
wiley +1 more source
Flow Characterisation of Flames in an Acoustically Excited Chamber [PDF]
, 2012 Flame-acoustic wave interactions have been studied widely in the combustion community; however the whole physicochemical mechanism is still not clear.
Chen, Li-Wei
core +5 more sources