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Weakly nonlinear thermoacoustics for stacks with slowly varying pore cross-sections [PDF]
A general theory of thermoacoustics is derived for arbitrary stack pores. Previous theoretical treatments of porous media are extended by considering arbitrarily shaped pores with the only restriction that the pore cross-sections vary slowly in the ...
Molenaar, J. +3 more
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Acoustic and Large Eddy Simulation studies of azimuthal modes in annular combustion chambers [PDF]
, 2012 The objectives of this paper are the description of azimuthal instability modes found in annular combus- tion chambers using two numerical tools: (1) Large Eddy Simulation (LES) methods and (2) acoustic solv- ers.
Gicquel, Laurent Y.M. +4 more
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Journal of Low Frequency Noise, Vibration and Active ControlDue to the incurred damages to the combustors, large-amplitude self-sustained thermoacoustic oscillations are unwanted in many propulsion systems, such as liquid/solid rocket motors and aero-engines.
Kai Pang +4 more
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Control of weak perturbations [PDF]
, 2012 Session 4aHT - Hot Topics: Aeroacoustics I: abstract 4aHT8Starting from p. 3207 of this journal issue is proceedings of ACOUSTICS 2012 HONG KONGWe define sound as being a weak perturbation in the properties of material consistent with the Navier-Stokes ...
Ffowcs Williams, JE, Huang, L
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NUMERICAL MODELLING OF THERMOACOUSTIC PHENOMENON AS CONTRIBUTION TO THERMOACOUSTIC ENGINE MODEL
TASK Quarterly, 2010 The presented paper shows our first step into the numerical modelling of the thermoacoustic phenomenon. The thermoacoustic effect has a great application potential, for instance, in thermoacoustic engines or thermoacoustic mixture separation.
LESZEK REMIORZ +2 more
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Shipin yu jixieObjectiveTo investigate the enhancement effect of self-excited thermoacoustic oscillation on the drying process of solid foods.MethodsA pulsating hot air drying device based on a Rijke tube resonator structure is designed.
ZHANG Han +4 more
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Progress in analytical methods to predict and control azimuthal combustion instability modes in annular chambers [PDF]
, 2016 Longitudinal low-frequency thermoacoustic unstable modes in combustion chambers have been intensively studied experimentally, numerically, and theoretically, leading to significant progress in both understanding and controlling these acoustic modes ...
Bauerheim, Michaël +2 more
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Language in Our Time: An Empirical Analysis of Hashtags [PDF]
, 2019 Hashtags in online social networks have gained tremendous popularity during the past five years. The resulting large quantity of data has provided a new lens into modern society. Previously, researchers mainly rely on data collected from Twitter to study
Zhang, Yang
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Intuitionism and the Modal Logic of Vagueness [PDF]
, 2020 Intuitionistic logic provides an elegant solution to the Sorites Paradox. Its acceptance has been hampered by two factors. First, the lack of an accepted semantics for languages containing vague terms has led even philosophers sympathetic to intuitionism
Bobzien, Susanne, Rumfitt, Ian
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Learning and Characterizing Chaotic Attractors of a Lean Premixed Combustor
EnergiesThis paper is about the characteristics of and a method to recognize the onset of limit cycle thermoacoustic oscillations in a gas turbine-like combustor with a premixed turbulent methane/air flame.
Sara Navarro-Arredondo, Jim B. W. Kok
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