Results 11 to 20 of about 1,024 (213)
Seeds of phase transition to thermoacoustic instability [PDF]
New Journal of Physics, 2022 Tackling the problem of emissions is at the forefront of scientific research today. While industrial engines designed to operate in stable regimes produce emissions, attempts to operate them at ‘greener’ conditions often fail due to a dangerous ...
M Raghunathan +5 more
doaj +5 more sources
Thermoacoustic Instability in Combustors [PDF]
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 ...
Morgans, AS, Yang, D
openaire +3 more sources
Stability Characteristics of a Model Trim Adjustment System for Open Loop Active Control of Thermoacoustic Instability [PDF]
Journal of Aerospace Technology and Management, 2019 Thermoacoustic instability in liquid rocket engines can have potentially catastrophic consequences. Active control based on feedback promises improved stability margin over a wider range of operating conditions than passive control.
Varghese M Thannickal +2 more
doaj +4 more sources
Numerical simulation of thermoacoustic instability in Rijke tube [PDF]
Xibei Gongye Daxue Xuebao, 2021 The influence of three different states on the thermoacoustic instability characteristics of Rijke tube was compared in order to reseach the influencing factors of thermoacoustic oscillation by using the Rijke tube model with stack as the heat source ...
doaj +2 more sources
The physics and regularities of the neutron-thermoacoustic instability [PDF]
Ядерна фізика та енергетика, 2018 The physics and regularities of the neutron-thermoacoustic instability (NTAI) in nuclear channels with subcooled nucleate boiling flows are explained. The method for obtaining the characteristic equation of NTAI in a VVER-type reactor is given.
S. N. Pelykh +2 more
doaj +2 more sources
Analysis on Combustion Instability Characteristics of Model Swirl Combustor With Gas Fuel
发电技术, 2022 Combustion instability is easy to occur under lean combustion of gas turbine. Analyzing and predicting the characteristics of unstable combustion is of great significance to ensure the normal operation of combustion chamber. The flame describing function
HAO Jiangang +4 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 +4 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 +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