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

"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 th...

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Autor principal: Indlekofer, Thomas
Otros Autores: Ariatabar, Behdad
Formato: Tesis de maestría
Lenguaje:Inglés
Publicado: 2019
Materias:
TURBINAS DE GAS
COMBUSTION
MODELOS MATEMATICOS
SIMULACION
DINAMICA DE FLUIDOS
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/1567
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-1567
record_format dspace
spelling I32-R138-123456789-15672022-12-07T15:21:18Z Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation Indlekofer, Thomas Ariatabar, Behdad Bauer, Hans-Jörg Hermeth, Sebastian TURBINAS DE GAS COMBUSTION MODELOS MATEMATICOS SIMULACION DINAMICA DE FLUIDOS "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." Tesis Energía y Ambiente (maestría) - Instituto Tecnológico de Buenos Aires, Buenos Aires - Karlsruher Institut für Technologie, Karlsruhe, 2017 2019-05-03T13:33:23Z 2019-05-03T13:33:23Z 2017 Tesis de maestría http://ri.itba.edu.ar/handle/123456789/1567 en application/pdf
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic TURBINAS DE GAS
COMBUSTION
MODELOS MATEMATICOS
SIMULACION
DINAMICA DE FLUIDOS
spellingShingle TURBINAS DE GAS
COMBUSTION
MODELOS MATEMATICOS
SIMULACION
DINAMICA DE FLUIDOS
Indlekofer, Thomas
Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation
topic_facet TURBINAS DE GAS
COMBUSTION
MODELOS MATEMATICOS
SIMULACION
DINAMICA DE FLUIDOS
description "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."
author2 Ariatabar, Behdad
author_facet Ariatabar, Behdad
Indlekofer, Thomas
format Tesis de maestría
author Indlekofer, Thomas
author_sort Indlekofer, Thomas
title Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation
title_short Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation
title_full Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation
title_fullStr Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation
title_full_unstemmed Evaluation of StarCCM+ to predict thermoacoustic instabilities using Large Eddy Simulation
title_sort evaluation of starccm+ to predict thermoacoustic instabilities using large eddy simulation
publishDate 2019
url http://ri.itba.edu.ar/handle/123456789/1567
work_keys_str_mv AT indlekoferthomas evaluationofstarccmtopredictthermoacousticinstabilitiesusinglargeeddysimulation
_version_ 1766093696992804864

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