Results 111 to 120 of about 2,929 (210)

Acoustic Design Parameter Change of a Pressurized Combustor Leading to Limit Cycle Oscillations

open access: yesEnergies
When aiming to cut down on the emission of nitric oxides by gas turbine engines, it is advantageous to have them operate at low combustion temperatures. This is achieved by lean premixed combustion.
Mehmet Kapucu   +2 more
doaj   +1 more source

On singularities and instability of reconstruction in thermoacoustic tomography

open access: yes, 2009
We consider the problem of thermoacoustic tomography (TAT), in which one needs to reconstruct the initial value of a solution of the wave equation from its value on an observation surface. We show that if some geometric rays for the equation do not intersect the observation surface, the reconstruction in TAT is not Hölder stable.
openaire   +2 more sources

Review of acoustic field effects on flame dynamics and combustion applications

open access: yesInternational Journal of Coal Science & Technology
Acoustic-flame coupling technology is an interdisciplinary frontier field investigating the complex interactions between sound waves and combustion. Generally, the acoustic field can be divided into two modes based on its relative position to the flame ...
Zhiwei Su, Yaoyao Ying, Dong Liu
doaj   +1 more source

Deep learning for early warning signals of tipping points. [PDF]

open access: yesProc Natl Acad Sci U S A, 2021
Bury TM   +6 more
europepmc   +1 more source

Causality and intrinsic thermoacoustic instability modes

open access: yes, 2014
Direct numerical simulation of a confined laminar premixed flame has been performed in an anechoic combustor, showing self-sustained intrinsic thermoacoustic oscillations. Theoretical predictions based on acoustic jump relations and the n − τ model for the flame are presented and causality concerns are discussed.
Courtine, Emilien   +6 more
openaire   +2 more sources

Universality in spectral condensation. [PDF]

open access: yesSci Rep, 2020
Pavithran I   +8 more
europepmc   +1 more source

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