Numerical and experimental study of unsteady wind loads on panels of a radar aerial

Autores
Scarabino, Ana Elena; García Saínz, Mariano Oscar; Bacchi, Federico; Delnero, Juan Sebastián; Cánchero, Andrés
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This work experimentally and numerically analyzes the flow configurations and the dynamic wind loads on panels of rectangular L/h 5:1 cross section mounted on a structural frame of rectangular bars of L/h 0.5:1, corresponding to a radar structure. The flui d dynamic interaction between panels and frame wakes imposes dynamic loads on the panels, with particular frequencies and Strouhal numbers, different from those of isolated elements. The numerical scheme is validated by comparison with mean forces and velo city spectra of a panel wake obtained by wind tunnel tests. The flow configuration is analyzed through images of the numerical simulations. For a large number of panels, as in the radar array, their wakes couple in either phase or counter counter-phase configurati ons, changing the resultant forces on each panel. Instantaneous normal and tangential force coefficients are reported; their spectra show two distinct peaks, caused by the interaction of the wakes. Finally, a scaled model of a rectangular structure compris ed of panels and frame elements is tested in the boundary layer wind tunnel in order to determine the influence of the velocity variation with height and the three three-dimensionality of the bulk flow around the structure. Results show that the unsteady aerodyn amic loads, being strongly influenced by the vortex shedding of the supporting elements and by the global 3 3-D geometry of the array, differ considerably on a panel in this array from loads acting on an isolated panel, not only in magnitude, but also in fre quency.
Grupo Fluidodinámica Computacional
Consejo Nacional de Investigaciones Científicas y Técnicas
Materia
Ingeniería Aeronáutica
wake interaction
dynamic loads
Strouhal number
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/164073
Acceder
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network_name_str SEDICI (UNLP)
spelling Numerical and experimental study of unsteady wind loads on panels of a radar aerialScarabino, Ana ElenaGarcía Saínz, Mariano OscarBacchi, FedericoDelnero, Juan SebastiánCánchero, AndrésIngeniería Aeronáuticawake interactiondynamic loadsStrouhal numberThis work experimentally and numerically analyzes the flow configurations and the dynamic wind loads on panels of rectangular L/h 5:1 cross section mounted on a structural frame of rectangular bars of L/h 0.5:1, corresponding to a radar structure. The flui d dynamic interaction between panels and frame wakes imposes dynamic loads on the panels, with particular frequencies and Strouhal numbers, different from those of isolated elements. The numerical scheme is validated by comparison with mean forces and velo city spectra of a panel wake obtained by wind tunnel tests. The flow configuration is analyzed through images of the numerical simulations. For a large number of panels, as in the radar array, their wakes couple in either phase or counter counter-phase configurati ons, changing the resultant forces on each panel. Instantaneous normal and tangential force coefficients are reported; their spectra show two distinct peaks, caused by the interaction of the wakes. Finally, a scaled model of a rectangular structure compris ed of panels and frame elements is tested in the boundary layer wind tunnel in order to determine the influence of the velocity variation with height and the three three-dimensionality of the bulk flow around the structure. Results show that the unsteady aerodyn amic loads, being strongly influenced by the vortex shedding of the supporting elements and by the global 3 3-D geometry of the array, differ considerably on a panel in this array from loads acting on an isolated panel, not only in magnitude, but also in fre quency.Grupo Fluidodinámica ComputacionalConsejo Nacional de Investigaciones Científicas y Técnicas2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1-18http://sedici.unlp.edu.ar/handle/10915/164073enginfo:eu-repo/semantics/altIdentifier/issn/1598-6225info:eu-repo/semantics/altIdentifier/doi/10.12989/was.2016.23.1.001info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:24:06Zoai:sedici.unlp.edu.ar:10915/164073Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:24:06.689SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Numerical and experimental study of unsteady wind loads on panels of a radar aerial
title Numerical and experimental study of unsteady wind loads on panels of a radar aerial
spellingShingle Numerical and experimental study of unsteady wind loads on panels of a radar aerial
Scarabino, Ana Elena
Ingeniería Aeronáutica
wake interaction
dynamic loads
Strouhal number
title_short Numerical and experimental study of unsteady wind loads on panels of a radar aerial
title_full Numerical and experimental study of unsteady wind loads on panels of a radar aerial
title_fullStr Numerical and experimental study of unsteady wind loads on panels of a radar aerial
title_full_unstemmed Numerical and experimental study of unsteady wind loads on panels of a radar aerial
title_sort Numerical and experimental study of unsteady wind loads on panels of a radar aerial
dc.creator.none.fl_str_mv Scarabino, Ana Elena
García Saínz, Mariano Oscar
Bacchi, Federico
Delnero, Juan Sebastián
Cánchero, Andrés
author Scarabino, Ana Elena
author_facet Scarabino, Ana Elena
García Saínz, Mariano Oscar
Bacchi, Federico
Delnero, Juan Sebastián
Cánchero, Andrés
author_role author
author2 García Saínz, Mariano Oscar
Bacchi, Federico
Delnero, Juan Sebastián
Cánchero, Andrés
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ingeniería Aeronáutica
wake interaction
dynamic loads
Strouhal number
topic Ingeniería Aeronáutica
wake interaction
dynamic loads
Strouhal number
dc.description.none.fl_txt_mv This work experimentally and numerically analyzes the flow configurations and the dynamic wind loads on panels of rectangular L/h 5:1 cross section mounted on a structural frame of rectangular bars of L/h 0.5:1, corresponding to a radar structure. The flui d dynamic interaction between panels and frame wakes imposes dynamic loads on the panels, with particular frequencies and Strouhal numbers, different from those of isolated elements. The numerical scheme is validated by comparison with mean forces and velo city spectra of a panel wake obtained by wind tunnel tests. The flow configuration is analyzed through images of the numerical simulations. For a large number of panels, as in the radar array, their wakes couple in either phase or counter counter-phase configurati ons, changing the resultant forces on each panel. Instantaneous normal and tangential force coefficients are reported; their spectra show two distinct peaks, caused by the interaction of the wakes. Finally, a scaled model of a rectangular structure compris ed of panels and frame elements is tested in the boundary layer wind tunnel in order to determine the influence of the velocity variation with height and the three three-dimensionality of the bulk flow around the structure. Results show that the unsteady aerodyn amic loads, being strongly influenced by the vortex shedding of the supporting elements and by the global 3 3-D geometry of the array, differ considerably on a panel in this array from loads acting on an isolated panel, not only in magnitude, but also in fre quency.
Grupo Fluidodinámica Computacional
Consejo Nacional de Investigaciones Científicas y Técnicas
description This work experimentally and numerically analyzes the flow configurations and the dynamic wind loads on panels of rectangular L/h 5:1 cross section mounted on a structural frame of rectangular bars of L/h 0.5:1, corresponding to a radar structure. The flui d dynamic interaction between panels and frame wakes imposes dynamic loads on the panels, with particular frequencies and Strouhal numbers, different from those of isolated elements. The numerical scheme is validated by comparison with mean forces and velo city spectra of a panel wake obtained by wind tunnel tests. The flow configuration is analyzed through images of the numerical simulations. For a large number of panels, as in the radar array, their wakes couple in either phase or counter counter-phase configurati ons, changing the resultant forces on each panel. Instantaneous normal and tangential force coefficients are reported; their spectra show two distinct peaks, caused by the interaction of the wakes. Finally, a scaled model of a rectangular structure compris ed of panels and frame elements is tested in the boundary layer wind tunnel in order to determine the influence of the velocity variation with height and the three three-dimensionality of the bulk flow around the structure. Results show that the unsteady aerodyn amic loads, being strongly influenced by the vortex shedding of the supporting elements and by the global 3 3-D geometry of the array, differ considerably on a panel in this array from loads acting on an isolated panel, not only in magnitude, but also in fre quency.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/164073
url http://sedici.unlp.edu.ar/handle/10915/164073
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1598-6225
info:eu-repo/semantics/altIdentifier/doi/10.12989/was.2016.23.1.001
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
1-18
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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