Results 191 to 200 of about 787,947 (227)
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Control of intrinsic thermoacoustic instabilities using hydrogen fuel
Proceedings of the Combustion Institute, 2020This conceptual numerical study explores a possible strategy for control of unstable intrinsic thermoacoustic (ITA) modes. Control of the ITA feedback loop has not been discussed yet.
A. Ghani, W. Polifke
semanticscholar +1 more source
Thermoacoustic Instability in Two-Dimensional Fluid Complex Plasmas
Physical Review Letters, 2018Thermoacoustic instability in a fluid monolayer complex plasma is studied for the first time. Experiments, theory, and simulations demonstrate that nonreciprocal effective interactions between particles (mediated by plasma flows) provide positive thermal feedback leading to acoustic sound amplification.
Kryuchkov, Nikita +5 more
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Investigation of self-induced thermoacoustic instabilities in gas turbine combustors
, 2020The self-induced thermoacoustic instabilities in partially premixed combustors remain a significant challenge which has received a limited research attention.
Sherif S. Rashwan, A. Mohany, I. Dincer
semanticscholar +1 more source
, 2020
This numerical study investigated the effects of the fresh mixture temperature on thermoacoustic instabilities in a lean premixed swirl-stabilized combustion chamber by utilizing high-fidelity, fully compressible large eddy simulations.
M. Shahsavari
semanticscholar +1 more source
This numerical study investigated the effects of the fresh mixture temperature on thermoacoustic instabilities in a lean premixed swirl-stabilized combustion chamber by utilizing high-fidelity, fully compressible large eddy simulations.
M. Shahsavari
semanticscholar +1 more source
Thermoacoustic Instability in Solid Rocket Motor: Non-Normality and Nonlinear Instabilities
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010An analytical framework is developed to understand and predict the thermoacoustic instability in solid rocket motors, taking into account the non-orthogonality of the eigenmodes of the unsteady coupled system. The coupled system comprises the dynamics of the acoustic field and the propellant burn rate.
Mariappan, Sathesh, Sujith, R. I.
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Thermoacoustic Instabilities in an Annular Rijke Tube
Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2010Thermoacoustic instabilities are a major concern in the design of gas turbine combustors. Most modern combustion chambers have an annular shape with multiple circumferentially arranged burners and, accordingly, suffer often from azimuthal instability modes.
Jonas P. Moeck +2 more
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Reduced-order modelling of thermoacoustic instabilities in a two-heater Rijke tube
, 2020The topic of thermoacoustic instabilities in combustors is well-investigated, as it is important in the field of combustion, primarily in gas-turbine engines.
C. Bhattacharya +3 more
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Time-Averaged Gradient Control of Thermoacoustic Instabilities
Journal of Propulsion and Power, 2003Active control of thermoacoustic instabilities has been an important topic of research for many years. In particular, adaptive-control approaches are continually investigated because of their potential ability to adjust to changing and unknown operating conditions. Most adaptive controllers are model based and require accurate knowledge of the plant to
Michael A. Vaudrey +2 more
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The Physics of Fluids, 2019
A comprehensive study on influences of hydrodynamic features of a swirling flow on thermoacoustic instabilities in a swirl stabilized combustor is performed by using large eddy simulations along with the dynamically thickened flame combustion model.
M. Shahsavari
semanticscholar +1 more source
A comprehensive study on influences of hydrodynamic features of a swirling flow on thermoacoustic instabilities in a swirl stabilized combustor is performed by using large eddy simulations along with the dynamically thickened flame combustion model.
M. Shahsavari
semanticscholar +1 more source