Numerical analysis of the effects brought by a twisted tape insert in elbow erosion
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/21519 http://dx.doi.org/10.14393/ufu.di.2018.135 |
Resumo: | Due to the ongoing problem related to erosion caused by the impingement of solid particles in many engineering fields, parts such elbows, for instance, are particularly prone to erosion issues. In this work, the insertion of a twisted tape at different positions upstream of a bend is investigated numerically with the intent of reducing the elbow erosion. To ensure the reliability of the numerical calculations, experimental data were used to validate the CFD model for the standard elbow. Subsequently, simulations considering one, two and four-way coupling were evaluated for both the standard and the twisted tape-equipped elbows. Simulations were run to evaluate the average particle impact angle, impact frequency and impact velocity and the penetration ratio for each geometry. The present work used the finite-volume, unstructured code UNSCYFL3D, which solves the gas flow using the fully coupled Euler-Lagrange approach. The two-layer k-epsilon was used to model turbulence effects. Interestingly, it was found that the swirling motion imparted to the particles by the twisted tape reduces the maximum penetration ratio in the bend. Another important finding is that the farther the insert is placed upstream of the elbow, the lower the erosion in the elbow, although the tape itself becomes more prone to erosion. In general, it was noticed that the fluid-particle and particle-particle interactions are very important and cannot be neglected. Consequently, depending on the mass loading and geometry configuration, elbow erosion can be dramatically reduced. |
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Numerical analysis of the effects brought by a twisted tape insert in elbow erosionAnálise numérica dos efeitos provocados pela inserção de uma fita torcida na erosão de cotovelosTwisted tapeElbow erosionFour-way couplingInterparticle collisionsErosion mitigationFita torcidaErosão em cotovelosQuatro-vias de acoplamentoColisões entre partículasMitigação da erosãoCNPQ::ENGENHARIAS::ENGENHARIA MECANICA::FENOMENOS DE TRANSPORTE::MECANICA DOS FLUIDOSDue to the ongoing problem related to erosion caused by the impingement of solid particles in many engineering fields, parts such elbows, for instance, are particularly prone to erosion issues. In this work, the insertion of a twisted tape at different positions upstream of a bend is investigated numerically with the intent of reducing the elbow erosion. To ensure the reliability of the numerical calculations, experimental data were used to validate the CFD model for the standard elbow. Subsequently, simulations considering one, two and four-way coupling were evaluated for both the standard and the twisted tape-equipped elbows. Simulations were run to evaluate the average particle impact angle, impact frequency and impact velocity and the penetration ratio for each geometry. The present work used the finite-volume, unstructured code UNSCYFL3D, which solves the gas flow using the fully coupled Euler-Lagrange approach. The two-layer k-epsilon was used to model turbulence effects. Interestingly, it was found that the swirling motion imparted to the particles by the twisted tape reduces the maximum penetration ratio in the bend. Another important finding is that the farther the insert is placed upstream of the elbow, the lower the erosion in the elbow, although the tape itself becomes more prone to erosion. In general, it was noticed that the fluid-particle and particle-particle interactions are very important and cannot be neglected. Consequently, depending on the mass loading and geometry configuration, elbow erosion can be dramatically reduced.CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoDissertação (Mestrado)Devido ao problema permanente relacionado à erosão provocada pelo choque de partículas sólidas em muitos campos da engenharia, peças como cotovelos de curvas , por exemplo, são particularmente propensos a problemas de erosão. Neste trabalho, a inserção de uma fita torcida em diferentes posições a montante de uma curva é investigada numericamente com a intenção de reduzir a erosão no cotovelo. Para assegurar a confiabilidade dos cálculos numéricos, dados experimentais foram utilizados para validar o modelo de CFD para o cotovelo padrão. Posteriormente, foram realizadas simulações considerando o acoplamento de uma, duas e quatro vias avaliando a curva padrão e as geometrias equipadas com a fita torcida. Foram feitas simulações para avaliar o ângulo de impacto médio de partícula, a frequência de impacto e velocidade de impacto e a taxa de penetração para cada geometria. O presente trabalho utilizou o código de volumes finitos UNSCYFL3D, que resolve o escoamento de gás usando a abordagem de Euler-Lagrange totalmente acoplada. O modelo k-epsilon duas camadas foi usado para modelar os efeitos de turbulência. Curiosamente, verificou-se que o movimento rotativo conferida às partículas pela fita torcida reduz a razão máxima de penetração na curva. Outra descoberta importante é que quanto mais a montante do cotovelo a inserção é colocado, menor a erosão no cotovelo, embora a própria fita se torna mais propensas a erosão. Em geral, observou-se que as interações de fluido- partícula e partícula-partícula são muito importantes e não podem ser negligenciadas. Por conseguinte, dependendo da carga mássica e configuração geométrica a erosão no cotovelo pode ser drasticamente reduzidaUniversidade Federal de UberlândiaBrasilPrograma de Pós-graduação em Engenharia MecânicaSouza, Francisco José dehttp://lattes.cnpq.br/1257320066520278Silva Junior, Washington Martins dahttp://lattes.cnpq.br/2993173987424895Meier, Henry Françahttp://lattes.cnpq.br/2594453880874755Duarte, Carlos Antônio Ribeirohttp://lattes.cnpq.br/3533635470069420Santos, Vinicius Fagundes dos2018-06-14T13:24:00Z2018-06-14T13:24:00Z2018-02-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfSANTOS, Vinicius Fagundes dos. Numerical analysis of the effects brought by a twisted tape insert in elbow erosion. 2018. 115 f. Dissertação (Mestrado em Engenharia mecânica) - Universidade Federal de Uberlândia, Uberlândia, 2018. DOI http://dx.doi.org/10.14393/ufu.di.2018.135.https://repositorio.ufu.br/handle/123456789/21519http://dx.doi.org/10.14393/ufu.di.2018.135enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFU2018-06-14T13:24:00Zoai:repositorio.ufu.br:123456789/21519Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2018-06-14T13:24Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion Análise numérica dos efeitos provocados pela inserção de uma fita torcida na erosão de cotovelos |
title |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion |
spellingShingle |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion Santos, Vinicius Fagundes dos Twisted tape Elbow erosion Four-way coupling Interparticle collisions Erosion mitigation Fita torcida Erosão em cotovelos Quatro-vias de acoplamento Colisões entre partículas Mitigação da erosão CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::FENOMENOS DE TRANSPORTE::MECANICA DOS FLUIDOS |
title_short |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion |
title_full |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion |
title_fullStr |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion |
title_full_unstemmed |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion |
title_sort |
Numerical analysis of the effects brought by a twisted tape insert in elbow erosion |
author |
Santos, Vinicius Fagundes dos |
author_facet |
Santos, Vinicius Fagundes dos |
author_role |
author |
dc.contributor.none.fl_str_mv |
Souza, Francisco José de http://lattes.cnpq.br/1257320066520278 Silva Junior, Washington Martins da http://lattes.cnpq.br/2993173987424895 Meier, Henry França http://lattes.cnpq.br/2594453880874755 Duarte, Carlos Antônio Ribeiro http://lattes.cnpq.br/3533635470069420 |
dc.contributor.author.fl_str_mv |
Santos, Vinicius Fagundes dos |
dc.subject.por.fl_str_mv |
Twisted tape Elbow erosion Four-way coupling Interparticle collisions Erosion mitigation Fita torcida Erosão em cotovelos Quatro-vias de acoplamento Colisões entre partículas Mitigação da erosão CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::FENOMENOS DE TRANSPORTE::MECANICA DOS FLUIDOS |
topic |
Twisted tape Elbow erosion Four-way coupling Interparticle collisions Erosion mitigation Fita torcida Erosão em cotovelos Quatro-vias de acoplamento Colisões entre partículas Mitigação da erosão CNPQ::ENGENHARIAS::ENGENHARIA MECANICA::FENOMENOS DE TRANSPORTE::MECANICA DOS FLUIDOS |
description |
Due to the ongoing problem related to erosion caused by the impingement of solid particles in many engineering fields, parts such elbows, for instance, are particularly prone to erosion issues. In this work, the insertion of a twisted tape at different positions upstream of a bend is investigated numerically with the intent of reducing the elbow erosion. To ensure the reliability of the numerical calculations, experimental data were used to validate the CFD model for the standard elbow. Subsequently, simulations considering one, two and four-way coupling were evaluated for both the standard and the twisted tape-equipped elbows. Simulations were run to evaluate the average particle impact angle, impact frequency and impact velocity and the penetration ratio for each geometry. The present work used the finite-volume, unstructured code UNSCYFL3D, which solves the gas flow using the fully coupled Euler-Lagrange approach. The two-layer k-epsilon was used to model turbulence effects. Interestingly, it was found that the swirling motion imparted to the particles by the twisted tape reduces the maximum penetration ratio in the bend. Another important finding is that the farther the insert is placed upstream of the elbow, the lower the erosion in the elbow, although the tape itself becomes more prone to erosion. In general, it was noticed that the fluid-particle and particle-particle interactions are very important and cannot be neglected. Consequently, depending on the mass loading and geometry configuration, elbow erosion can be dramatically reduced. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-06-14T13:24:00Z 2018-06-14T13:24:00Z 2018-02-07 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
SANTOS, Vinicius Fagundes dos. Numerical analysis of the effects brought by a twisted tape insert in elbow erosion. 2018. 115 f. Dissertação (Mestrado em Engenharia mecânica) - Universidade Federal de Uberlândia, Uberlândia, 2018. DOI http://dx.doi.org/10.14393/ufu.di.2018.135. https://repositorio.ufu.br/handle/123456789/21519 http://dx.doi.org/10.14393/ufu.di.2018.135 |
identifier_str_mv |
SANTOS, Vinicius Fagundes dos. Numerical analysis of the effects brought by a twisted tape insert in elbow erosion. 2018. 115 f. Dissertação (Mestrado em Engenharia mecânica) - Universidade Federal de Uberlândia, Uberlândia, 2018. DOI http://dx.doi.org/10.14393/ufu.di.2018.135. |
url |
https://repositorio.ufu.br/handle/123456789/21519 http://dx.doi.org/10.14393/ufu.di.2018.135 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Uberlândia Brasil Programa de Pós-graduação em Engenharia Mecânica |
publisher.none.fl_str_mv |
Universidade Federal de Uberlândia Brasil Programa de Pós-graduação em Engenharia Mecânica |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFU instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Repositório Institucional da UFU |
collection |
Repositório Institucional da UFU |
repository.name.fl_str_mv |
Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
diinf@dirbi.ufu.br |
_version_ |
1805569591153262592 |