Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors

Autores
Coussirat, Miguel; Moll, Flavio
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
Cavitation in pressure injectors/atomizers affects the liquid/spray jet behavior at its outlet. The type of atomization induced by cavitation allows developing efficient devices if this cavitation state is controlled. Cavitating flow is related to turbulent and multiphase flows with mass transfer between the liquid and its gaseous phase and which is affected by several factors. Due to the high-speed flow and small spatial and time scales involved, the study of cavitating flows using physical experiments is very expensive. By means of numerical simulations using eddy viscosity models, some of the incipient and slight developed cavitating flow characteristics in nozzles are captured, but the level of the vapor fraction is commonly underestimated. It is evident that a suitable calibration of the turbulence models based on the special characteristics of the incipient/slight developed cavitating flows allows obtaining improved results. This special calibration is necessary due to the close relation between the cavitation inception/developing conditions and the turbulence level in the flow leading to a “nonstandard turbulence state.” So, cavitating flows should not be modeled as a simple turbulent one. It is also demonstrated that the results obtained become competitive compared against the ones computed by large eddy simulations, which need a lot of computational resources and an appropriate initial solution for running. The conclusions obtained can be useful to improve injector designs because the suitable simulation of the incipient cavitation or slight developed cavitation flow conditions can be accurately simulated after calibration.
Fil: Universidad Tecnológica Nacional . Facultad Regional Mendoza, Argentina
Peer Reviewed
Fuente
Journal of Fluids Engineering 143, (2021)
Materia
Avitation, Turbulence, Eddy viscosity models, Validation/calibration, Nozzle injectors
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2024-04-05T15:39:47Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/10348
Acceder
id RIAUTN_da6caed461fae30b495b32262ab8d942
oai_identifier_str oai:ria.utn.edu.ar:20.500.12272/10348
network_acronym_str RIAUTN
repository_id_str a
network_name_str Repositorio Institucional Abierto (UTN)
spelling Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectorsCoussirat, MiguelMoll, FlavioAvitation, Turbulence, Eddy viscosity models, Validation/calibration, Nozzle injectorsCavitation in pressure injectors/atomizers affects the liquid/spray jet behavior at its outlet. The type of atomization induced by cavitation allows developing efficient devices if this cavitation state is controlled. Cavitating flow is related to turbulent and multiphase flows with mass transfer between the liquid and its gaseous phase and which is affected by several factors. Due to the high-speed flow and small spatial and time scales involved, the study of cavitating flows using physical experiments is very expensive. By means of numerical simulations using eddy viscosity models, some of the incipient and slight developed cavitating flow characteristics in nozzles are captured, but the level of the vapor fraction is commonly underestimated. It is evident that a suitable calibration of the turbulence models based on the special characteristics of the incipient/slight developed cavitating flows allows obtaining improved results. This special calibration is necessary due to the close relation between the cavitation inception/developing conditions and the turbulence level in the flow leading to a “nonstandard turbulence state.” So, cavitating flows should not be modeled as a simple turbulent one. It is also demonstrated that the results obtained become competitive compared against the ones computed by large eddy simulations, which need a lot of computational resources and an appropriate initial solution for running. The conclusions obtained can be useful to improve injector designs because the suitable simulation of the incipient cavitation or slight developed cavitation flow conditions can be accurately simulated after calibration.Fil: Universidad Tecnológica Nacional . Facultad Regional Mendoza, ArgentinaPeer Reviewed2024-04-05T15:39:47Z2024-04-05T15:39:47Z2021-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articulopdfapplication/pdfJournal of Fluids Engineeringhttp://hdl.handle.net/20.500.12272/1034810.1115/1.4049044Journal of Fluids Engineering 143, (2021)reponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacionalenginfo:eu-repo/semantics/openAccess2024-04-05T15:39:47Zhttp://creativecommons.org/publicdomain/zero/1.0/CC0 1.0 UniversalUniversidad Tecnológica Nacional. Facultad Regional MendozaAtribución2026-09-24T12:44:36Zoai:ria.utn.edu.ar:20.500.12272/10348instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2026-09-24 12:44:38.14Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
title Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
spellingShingle Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
Coussirat, Miguel
Avitation, Turbulence, Eddy viscosity models, Validation/calibration, Nozzle injectors
title_short Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
title_full Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
title_fullStr Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
title_full_unstemmed Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
title_sort Recalibration of eddy viscosity models for numerical simulation of cavitating flow patterns in low pressure nozzle injectors
dc.creator.none.fl_str_mv Coussirat, Miguel
Moll, Flavio
author Coussirat, Miguel
author_facet Coussirat, Miguel
Moll, Flavio
author_role author
author2 Moll, Flavio
author2_role author
dc.subject.none.fl_str_mv Avitation, Turbulence, Eddy viscosity models, Validation/calibration, Nozzle injectors
topic Avitation, Turbulence, Eddy viscosity models, Validation/calibration, Nozzle injectors
dc.description.none.fl_txt_mv Cavitation in pressure injectors/atomizers affects the liquid/spray jet behavior at its outlet. The type of atomization induced by cavitation allows developing efficient devices if this cavitation state is controlled. Cavitating flow is related to turbulent and multiphase flows with mass transfer between the liquid and its gaseous phase and which is affected by several factors. Due to the high-speed flow and small spatial and time scales involved, the study of cavitating flows using physical experiments is very expensive. By means of numerical simulations using eddy viscosity models, some of the incipient and slight developed cavitating flow characteristics in nozzles are captured, but the level of the vapor fraction is commonly underestimated. It is evident that a suitable calibration of the turbulence models based on the special characteristics of the incipient/slight developed cavitating flows allows obtaining improved results. This special calibration is necessary due to the close relation between the cavitation inception/developing conditions and the turbulence level in the flow leading to a “nonstandard turbulence state.” So, cavitating flows should not be modeled as a simple turbulent one. It is also demonstrated that the results obtained become competitive compared against the ones computed by large eddy simulations, which need a lot of computational resources and an appropriate initial solution for running. The conclusions obtained can be useful to improve injector designs because the suitable simulation of the incipient cavitation or slight developed cavitation flow conditions can be accurately simulated after calibration.
Fil: Universidad Tecnológica Nacional . Facultad Regional Mendoza, Argentina
Peer Reviewed
description Cavitation in pressure injectors/atomizers affects the liquid/spray jet behavior at its outlet. The type of atomization induced by cavitation allows developing efficient devices if this cavitation state is controlled. Cavitating flow is related to turbulent and multiphase flows with mass transfer between the liquid and its gaseous phase and which is affected by several factors. Due to the high-speed flow and small spatial and time scales involved, the study of cavitating flows using physical experiments is very expensive. By means of numerical simulations using eddy viscosity models, some of the incipient and slight developed cavitating flow characteristics in nozzles are captured, but the level of the vapor fraction is commonly underestimated. It is evident that a suitable calibration of the turbulence models based on the special characteristics of the incipient/slight developed cavitating flows allows obtaining improved results. This special calibration is necessary due to the close relation between the cavitation inception/developing conditions and the turbulence level in the flow leading to a “nonstandard turbulence state.” So, cavitating flows should not be modeled as a simple turbulent one. It is also demonstrated that the results obtained become competitive compared against the ones computed by large eddy simulations, which need a lot of computational resources and an appropriate initial solution for running. The conclusions obtained can be useful to improve injector designs because the suitable simulation of the incipient cavitation or slight developed cavitation flow conditions can be accurately simulated after calibration.
publishDate 2021
dc.date.none.fl_str_mv 2021-03-01
2024-04-05T15:39:47Z
2024-04-05T15:39:47Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv Journal of Fluids Engineering
http://hdl.handle.net/20.500.12272/10348
10.1115/1.4049044
identifier_str_mv Journal of Fluids Engineering
10.1115/1.4049044
url http://hdl.handle.net/20.500.12272/10348
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2024-04-05T15:39:47Z
http://creativecommons.org/publicdomain/zero/1.0/
CC0 1.0 Universal
Universidad Tecnológica Nacional. Facultad Regional Mendoza
Atribución
eu_rights_str_mv openAccess
rights_invalid_str_mv 2024-04-05T15:39:47Z
http://creativecommons.org/publicdomain/zero/1.0/
CC0 1.0 Universal
Universidad Tecnológica Nacional. Facultad Regional Mendoza
Atribución
dc.format.none.fl_str_mv pdf
application/pdf
dc.source.none.fl_str_mv Journal of Fluids Engineering 143, (2021)
reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
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score 13.24418

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