Hydrodynamic transition delay in rectangular channels under high heat flux

Autores
Silin, Nicolas; Masson, Viviana Patricia; Osorio, Orlando Darío; Converti, J.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
When upgrading a research nuclear reactor for a higher power output it can be expected that the cooling flow rate has to be increased. In the case of a reactor designed with a laminar cooling flow this upgrade may take the flow into the transition hydrodynamic regime. In this work we explore experimentally the laminar to turbulent transition in a rectangular channel with similar characteristics as the refrigerating passages between the fuel plates in a research reactor core. The measurements were performed under heat fluxes up to 10 W/cm2, which is similar to the heat flux found in pool type research reactors. Special care has been taken in the test section to minimize the entrance turbulence and to reproduce the superficial characteristics of the aluminium cladding of the nuclear fuel. We have measured the transition Reynolds number as the bulk Reynolds number at the point of minimum Nusselt number for each condition studied. It was observed that the bulk Reynolds number at which the transition to turbulence is detected depends on the heat flux at the walls. This result is in agreement with a recent theoretical analysis, which shows that property variations near the wall, particularly the reduction of viscosity, have a stabilizing effect on the flow.
Fil: Silin, Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Masson, Viviana Patricia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Osorio, Orlando Darío. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Converti, J.. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Materia
HYDRODYNAMIC
TRANSITION
DELAY
RECTANGULAR
CHANNELS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/280803
Acceder
id CONICETDig_e8b713600506f673873dcba2bfe0b38e
oai_identifier_str oai:ri.conicet.gov.ar:11336/280803
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Hydrodynamic transition delay in rectangular channels under high heat fluxSilin, NicolasMasson, Viviana PatriciaOsorio, Orlando DaríoConverti, J.HYDRODYNAMICTRANSITIONDELAYRECTANGULARCHANNELShttps://purl.org/becyt/ford/2.3https://purl.org/becyt/ford/2When upgrading a research nuclear reactor for a higher power output it can be expected that the cooling flow rate has to be increased. In the case of a reactor designed with a laminar cooling flow this upgrade may take the flow into the transition hydrodynamic regime. In this work we explore experimentally the laminar to turbulent transition in a rectangular channel with similar characteristics as the refrigerating passages between the fuel plates in a research reactor core. The measurements were performed under heat fluxes up to 10 W/cm2, which is similar to the heat flux found in pool type research reactors. Special care has been taken in the test section to minimize the entrance turbulence and to reproduce the superficial characteristics of the aluminium cladding of the nuclear fuel. We have measured the transition Reynolds number as the bulk Reynolds number at the point of minimum Nusselt number for each condition studied. It was observed that the bulk Reynolds number at which the transition to turbulence is detected depends on the heat flux at the walls. This result is in agreement with a recent theoretical analysis, which shows that property variations near the wall, particularly the reduction of viscosity, have a stabilizing effect on the flow.Fil: Silin, Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Masson, Viviana Patricia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Osorio, Orlando Darío. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Converti, J.. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaPergamon-Elsevier Science Ltd2010-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/280803Silin, Nicolas; Masson, Viviana Patricia; Osorio, Orlando Darío; Converti, J.; Hydrodynamic transition delay in rectangular channels under high heat flux; Pergamon-Elsevier Science Ltd; Annals of Nuclear Energy; 37; 4; 4-2010; 615-6200306-4549CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0306454909003879info:eu-repo/semantics/altIdentifier/doi/10.1016/j.anucene.2009.12.013info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T12:23:20Zoai:ri.conicet.gov.ar:11336/280803instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982026-02-06 12:23:20.335CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Hydrodynamic transition delay in rectangular channels under high heat flux
title Hydrodynamic transition delay in rectangular channels under high heat flux
spellingShingle Hydrodynamic transition delay in rectangular channels under high heat flux
Silin, Nicolas
HYDRODYNAMIC
TRANSITION
DELAY
RECTANGULAR
CHANNELS
title_short Hydrodynamic transition delay in rectangular channels under high heat flux
title_full Hydrodynamic transition delay in rectangular channels under high heat flux
title_fullStr Hydrodynamic transition delay in rectangular channels under high heat flux
title_full_unstemmed Hydrodynamic transition delay in rectangular channels under high heat flux
title_sort Hydrodynamic transition delay in rectangular channels under high heat flux
dc.creator.none.fl_str_mv Silin, Nicolas
Masson, Viviana Patricia
Osorio, Orlando Darío
Converti, J.
author Silin, Nicolas
author_facet Silin, Nicolas
Masson, Viviana Patricia
Osorio, Orlando Darío
Converti, J.
author_role author
author2 Masson, Viviana Patricia
Osorio, Orlando Darío
Converti, J.
author2_role author
author
author
dc.subject.none.fl_str_mv HYDRODYNAMIC
TRANSITION
DELAY
RECTANGULAR
CHANNELS
topic HYDRODYNAMIC
TRANSITION
DELAY
RECTANGULAR
CHANNELS
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.3
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv When upgrading a research nuclear reactor for a higher power output it can be expected that the cooling flow rate has to be increased. In the case of a reactor designed with a laminar cooling flow this upgrade may take the flow into the transition hydrodynamic regime. In this work we explore experimentally the laminar to turbulent transition in a rectangular channel with similar characteristics as the refrigerating passages between the fuel plates in a research reactor core. The measurements were performed under heat fluxes up to 10 W/cm2, which is similar to the heat flux found in pool type research reactors. Special care has been taken in the test section to minimize the entrance turbulence and to reproduce the superficial characteristics of the aluminium cladding of the nuclear fuel. We have measured the transition Reynolds number as the bulk Reynolds number at the point of minimum Nusselt number for each condition studied. It was observed that the bulk Reynolds number at which the transition to turbulence is detected depends on the heat flux at the walls. This result is in agreement with a recent theoretical analysis, which shows that property variations near the wall, particularly the reduction of viscosity, have a stabilizing effect on the flow.
Fil: Silin, Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Masson, Viviana Patricia. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Osorio, Orlando Darío. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Converti, J.. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
description When upgrading a research nuclear reactor for a higher power output it can be expected that the cooling flow rate has to be increased. In the case of a reactor designed with a laminar cooling flow this upgrade may take the flow into the transition hydrodynamic regime. In this work we explore experimentally the laminar to turbulent transition in a rectangular channel with similar characteristics as the refrigerating passages between the fuel plates in a research reactor core. The measurements were performed under heat fluxes up to 10 W/cm2, which is similar to the heat flux found in pool type research reactors. Special care has been taken in the test section to minimize the entrance turbulence and to reproduce the superficial characteristics of the aluminium cladding of the nuclear fuel. We have measured the transition Reynolds number as the bulk Reynolds number at the point of minimum Nusselt number for each condition studied. It was observed that the bulk Reynolds number at which the transition to turbulence is detected depends on the heat flux at the walls. This result is in agreement with a recent theoretical analysis, which shows that property variations near the wall, particularly the reduction of viscosity, have a stabilizing effect on the flow.
publishDate 2010
dc.date.none.fl_str_mv 2010-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/280803
Silin, Nicolas; Masson, Viviana Patricia; Osorio, Orlando Darío; Converti, J.; Hydrodynamic transition delay in rectangular channels under high heat flux; Pergamon-Elsevier Science Ltd; Annals of Nuclear Energy; 37; 4; 4-2010; 615-620
0306-4549
CONICET Digital
CONICET
url http://hdl.handle.net/11336/280803
identifier_str_mv Silin, Nicolas; Masson, Viviana Patricia; Osorio, Orlando Darío; Converti, J.; Hydrodynamic transition delay in rectangular channels under high heat flux; Pergamon-Elsevier Science Ltd; Annals of Nuclear Energy; 37; 4; 4-2010; 615-620
0306-4549
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0306454909003879
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.anucene.2009.12.013
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1856403029753856000
score 13.106097

Publicaciones similares