Blar i NTNU Open på forfatter "Moeck, Jonas"
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Sensitivity of the Rayleigh criterion in thermoacoustics
Magri, Luca; Juniper, Matthew; Moeck, Jonas (Peer reviewed; Journal article, 2020)Thermoacoustic instabilities are one of the most challenging problems faced by gas turbine and rocket motor manufacturers. The key instability mechanism is described by the Rayleigh criterion. The Rayleigh criterion does ... -
Solution of Thermoacoustic Eigenvalue Problems with a Non-iterative Method
Buschmann, Philip Erik; Mensah, Georg; Nicoud, Franck; Moeck, Jonas (Peer reviewed; Journal article, 2020)Gas turbine combustors are prone to undesirable combustion dynamics in the form of thermoacoustic oscillations. Analysis of the stability of thermoacoustic systems in the frequency domain leads to nonlinear eigenvalue ... -
Symmetry-breaking in thermoacoustics: Theory and experimental validation on an annular system with electroacoustic feedback
Humbert, Sylvain; Moeck, Jonas; Paschereit, Oliver; Orchini, Alessandro (Peer reviewed; Journal article, 2023)In this study, we investigate experimentally the linear and nonlinear thermoacoustic response of an annular combustor model with electroacoustic feedback to study the effects that various types of asymmetric modifications ... -
Systematic modulation of the flame transfer function and its effect on thermoacoustic stability
Æsøy, Eirik; Dawson, James Richard; Moeck, Jonas (Journal article; Peer reviewed, 2024)We investigate the thermoacoustic response of a simple laboratory combustor where the flame response is varied systematically by combining hydrogen enrichment with coherent vortex shedding to introduce modulations in the ... -
The dynamic response of laminar hydrogen-ammonia flames
Öhman, Elias (Master thesis, 2024)Flammestabilitet for karbonfrie flammer er et svært relevant tema i disse dager. Siden den dynamiske flammeresponsen til disse drivstoffene er svært forskjellig fra konvensjonelle karbonbaserte drivstoff, kreves det mer ... -
Thermoacoustic modes of intrinsic and acoustic origin and their interplay with exceptional points
Orchini, Alessandro; Silva, Camilo; Mensah, Georg; Moeck, Jonas (Peer reviewed; Journal article, 2020)We propose a general classification of all the modes of a given thermoacoustic system into two sets: one of acoustic origin and one of intrinsic thermoacoustic (ITA) origin. To do this, the definition of intrinsic modes, ... -
Thermoacoustic oscillations in a can-annular model combustor with asymmetries in the can-to-can coupling
Buschmann, Philip Erik; Worth, Nicholas; Moeck, Jonas (Peer reviewed; Journal article, 2022)Can-annular combustors are equipped with a set of nominally identical cans, circumferentially arranged around the shaft. Adjacent cans are coupled acoustically via a small gap at the downstream end, where the circular ...