Results 31 to 40 of about 3,416 (181)
Modelling and Simulation in Engineering, Volume 2018, Issue 1, 2018., 2018 This paper describes a numerical model based on discontinuous Galerkin method for thermoacoustic investigation. Numerical investigation was conducted to study the behaviour of thermoacoustic wave propagations induced by thermal effects in 2‐dimensional enclosure. The compressible Navier‐Stokes equations are used as the governing equations.
Pranowo Pranowo +2 more
wiley +1 more source
Effect of pointed and diffused air injection on premixed flame confined in a Rijke tube
Cogent Engineering, 2016 The coupling between pressure fluctuations and unsteady heat release in a combustion systems results in acoustic oscillations inside the combustion system.
Nilaj N. Deshmukh, S.D. Sharma
doaj +1 more source
Reduced erbium-doped ceria nanoparticles: one nano-host applicable for simultaneous optical down- and up-conversions [PDF]
, 2014 This paper introduces a new synthesis procedure to form erbium-doped ceria nanoparticles (EDC NPs) that can act as an optical medium for both up-conversion and down-conversion in the same time.
Clavel, Michael +7 more
core +3 more sources
Thermoacoustic instability - a dynamical system and time domain analysis
, 2014 This study focuses on the Rijke tube problem, which includes features relevant to the modeling of thermoacoustic coupling in reactive flows: a compact acoustic source, an empirical model for the heat source, and nonlinearities.
Chenadec, Vincent Le +4 more
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Frequency domain and time domain analysis of thermoacoustic oscillations with wave-based acoustics [PDF]
, 2015 Many thermoacoustic systems exhibit rich nonlinear behaviour. Recent studies show that this nonlinear dynamics can be well captured by low-order time domain models that couple a level set kinematic model for a laminar flame, the $G$-equation, with a ...
Illingworth, SJ, Juniper, MP, Orchini, A
core +1 more source
Study of Thermoacoustic Phenomenon in a Rijke Tube
Procedia Engineering, 2014 AbstractThermoacoustics is concerned with the interactions between heat (thermo) and pressure oscillations in gases (acoustics). A “Rijke Tube”, named after its inventor, is a fundamental tool for studying thermoacoustic phenomenon. Rijke's tube turns heat into sound, by creating a self-amplifying standing wave.
Atis, C.A.A., Sarker, M., Ehsan, M.
openaire +1 more source
Limit-Cycle Properties of a Rijke Tube [PDF]
, 2003 Thermoacoustic instability appears when unsteady heat release is favourably coupled with acoustic pressure perturbations. The important technical applications involving thermoacoustics are combustion instability in rocket motors and low-pollutant lean ...
Culick, F. E. C., Matveev, K. I.
core
IET Control Theory &Applications, Volume 19, Issue 1, January/December 2025.This paper proposes an observer‐based adaptive output‐feedback boundary control to stabilize the vibrations of the moving cage of a dual‐cable mining elevator. This system is comprised of two mechanically jointed winding drums that drive the two cables through the floating sheaves to lift the cage.
Elham Aarabi +2 more
wiley +1 more source
Research on Suppression of Vibration Caused by Combustion Pressure Pulsation in Aircraft Engines
Shock and Vibration, Volume 2024, Issue 1, 2024.Abnormal high‐energy narrowband signals appeared in the aircraft engine test. By analyzing the characteristics of the vibration signals and the pressure pulsation signals in the measurement point data of the engine, it can be speculated that the abnormal vibration energy of the engine is not related to the operation of rotating parts, which upends a ...
Liang Hong +6 more
wiley +1 more source
Global modes, receptivity, and sensitivity analysis of diffusion flames coupled with duct acoustics [PDF]
, 2014 In this theoretical and numerical paper, we derive the adjoint equations for a thermo-acoustic system consisting of an infinite-rate chemistry diffusion flame coupled with duct acoustics. We then calculate the thermo-acoustic system's linear global modes
Juniper, MP, Magri, L
core +2 more sources