Numerical and experimental study of unsteady wind loads on panels of a radar aerial
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 fr...
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| Formato: | Articulo |
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2016
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/164073 |
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I19-R120-10915-1640732024-03-21T04:08:43Z http://sedici.unlp.edu.ar/handle/10915/164073 Numerical and experimental study of unsteady wind loads on panels of a radar aerial Scarabino, Ana Elena García Saínz, Mariano Oscar Bacchi, Federico Delnero, Juan Sebastián Cánchero, Andrés 2016 2024-03-20T17:34:58Z en Ingeniería Aeronáutica wake interaction dynamic loads Strouhal number 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 Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 1-18 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ingeniería Aeronáutica wake interaction dynamic loads Strouhal number |
| spellingShingle |
Ingeniería Aeronáutica wake interaction dynamic loads Strouhal number Scarabino, Ana Elena García Saínz, Mariano Oscar Bacchi, Federico Delnero, Juan Sebastián Cánchero, Andrés Numerical and experimental study of unsteady wind loads on panels of a radar aerial |
| topic_facet |
Ingeniería Aeronáutica wake interaction dynamic loads Strouhal number |
| 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. |
| format |
Articulo Articulo |
| author |
Scarabino, Ana Elena García Saínz, Mariano Oscar Bacchi, Federico Delnero, Juan Sebastián Cánchero, Andrés |
| author_facet |
Scarabino, Ana Elena García Saínz, Mariano Oscar Bacchi, Federico Delnero, Juan Sebastián Cánchero, Andrés |
| author_sort |
Scarabino, Ana Elena |
| title |
Numerical and experimental study of unsteady wind loads on panels of a radar aerial |
| 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 |
| publishDate |
2016 |
| url |
http://sedici.unlp.edu.ar/handle/10915/164073 |
| work_keys_str_mv |
AT scarabinoanaelena numericalandexperimentalstudyofunsteadywindloadsonpanelsofaradaraerial AT garciasainzmarianooscar numericalandexperimentalstudyofunsteadywindloadsonpanelsofaradaraerial AT bacchifederico numericalandexperimentalstudyofunsteadywindloadsonpanelsofaradaraerial AT delnerojuansebastian numericalandexperimentalstudyofunsteadywindloadsonpanelsofaradaraerial AT cancheroandres numericalandexperimentalstudyofunsteadywindloadsonpanelsofaradaraerial |
| _version_ |
1807222720009601024 |