Experimental sensitivity analysis and control of thermoacoustic systems [PDF]
, 2015 In this paper, we report the results of an experimental sensitivity analysis on a thermoacoustic system – an electrically heated Rijke tube. We measure the change of the linear stability characteristics of the system, quantified as shifts in the growth ...
Jamieson, NP +3 more
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Bistability and Triggering Analysis of Thermoacoustic Instability in a Horizontal Rijke Tube
Xibei Gongye Daxue Xuebao, 2019 Dynamical systems theory has been often employed to study nonlinear flow and flame dynamics in combustion systems. However, the corresponding studies using nonlinear dynamics to analyze the Rijke tube thermoacoustic system are still occasional.
doaj +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
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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
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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
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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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Using LES to Study Reacting Flows and Instabilities in Annular Combustion Chambers [PDF]
, 2012 Great prominence is put on the design of aeronautical gas turbines due to increasingly stringent regulations and the need to tackle rising fuel prices.
A Giauque +36 more
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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
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
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