Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation

Indlekofer, Thomas

Tesis de maestría:
Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation

dc.contributor.advisor	Ariatabar, Behdad
dc.contributor.advisor	Bauer, Hans-Jörg
dc.contributor.advisor	Hermeth, Sebastian
dc.contributor.author	Indlekofer, Thomas
dc.date.accessioned	2019-05-03T13:33:23Z
dc.date.available	2019-05-03T13:33:23Z
dc.date.issued	2017
dc.description.abstract	"Self-sustained pressure and heat-release oscillations yielded by thermoacoustic coupling are a major problem of gas turbine operation and methods to predict them are needed. This work investigates the capabilities of Large Eddy Simulation (LES) in StarCCM+ to predict these instabilities in the academic Volvo bluff-body combustor. First, simplified cases are studied to assess boundary condition treatment and numerical accuracy of the methods available. The non-reactive operating point is predicted accurately, showing good agreement for velocity fields as well as the ability to predict the vortex shedding frequency in the intrinsically unsteady region of the recirculation zone. For a reacting-stable operating point the acceleration downstream of the bluff body is overpredicted and the flow fields are not predicted accurately. Low frequency oscillations of the unstable operating points are evidenced coincididing with experimental results and an acoustic analysis based on Comsol Multiphysics. Up to = 1:0 the coherence of the equivalence ratio and the magnitude of the instabilities is predicted qualitatively."	en
dc.description.notes	Tesis Energía y Ambiente (maestría) - Instituto Tecnológico de Buenos Aires, Buenos Aires - Karlsruher Institut für Technologie, Karlsruhe, 2017	es
dc.identifier.uri	http://ri.itba.edu.ar/handle/123456789/1567
dc.language.iso	en	en
dc.subject	TURBINAS DE GAS	es
dc.subject	COMBUSTION	es
dc.subject	MODELOS MATEMATICOS	es
dc.subject	SIMULACION	es
dc.subject	DINAMICA DE FLUIDOS	es
dc.title	Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation	en
dc.type	Tesis de maestría	es
dspace.entity.type	Tesis de Maestría
itba.description.filiation	Fil: Indlekofer, Thomas. Instituto Tecnológico de Buenos Aires; Argentina.