Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/75808 |
Resumo: | This paper presents the experimental analysis of the propagation of a disturbance with a fixed frequency in the incidence velocity of the cross flow through a tube bank, and its influence on the velocity fluctuations inside the bank. The disturbance is generated outside the bank by vortex shedding from an obstacle. The tube banks investigated had square arrangement and aspect ratio P/D = 1.60 and 1.26. Air was the working fluid. Measurements were performed with hot wires. Behavior of fluctuating velocities is described by means of autospectral density. The results show that the frequency of the disturbance remains unchanged as it passes through the bank, and subsists until the 4th row in spite of the high turbulence intensities and of the fact that flow velocity inside the bank varies with the position. This fact indicates that external excitations can be transferred to the solid boundaries of the bank maintaining their original frequency. Continuous Wavelet Transforms of the signals show that, in time domain, the frequency of the disturbance has an almost steady behavior. |
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Endres, Luiz Augusto MagalhãesMoller, Sergio Vicosa2013-07-11T02:22:32Z20091806-3691http://hdl.handle.net/10183/75808000728512This paper presents the experimental analysis of the propagation of a disturbance with a fixed frequency in the incidence velocity of the cross flow through a tube bank, and its influence on the velocity fluctuations inside the bank. The disturbance is generated outside the bank by vortex shedding from an obstacle. The tube banks investigated had square arrangement and aspect ratio P/D = 1.60 and 1.26. Air was the working fluid. Measurements were performed with hot wires. Behavior of fluctuating velocities is described by means of autospectral density. The results show that the frequency of the disturbance remains unchanged as it passes through the bank, and subsists until the 4th row in spite of the high turbulence intensities and of the fact that flow velocity inside the bank varies with the position. This fact indicates that external excitations can be transferred to the solid boundaries of the bank maintaining their original frequency. Continuous Wavelet Transforms of the signals show that, in time domain, the frequency of the disturbance has an almost steady behavior.application/pdfengJournal of the Brazilian Society of Mechanical Sciences and Engineering. Rio de Janeiro, RJ. vol. 31, no. 3 (July/Sept. 2009), p. 232-242Escoamento turbulentoTubosTube bankTurbulent flowVelocity fluctuationsExperimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banksinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000728512.pdf000728512.pdfTexto completo (inglês)application/pdf434386http://www.lume.ufrgs.br/bitstream/10183/75808/1/000728512.pdf7643bd46c349278bab30a4082c2a189fMD51TEXT000728512.pdf.txt000728512.pdf.txtExtracted Texttext/plain58141http://www.lume.ufrgs.br/bitstream/10183/75808/2/000728512.pdf.txtdf096939267b993e743f0c92fc37a7c6MD52THUMBNAIL000728512.pdf.jpg000728512.pdf.jpgGenerated Thumbnailimage/jpeg2154http://www.lume.ufrgs.br/bitstream/10183/75808/3/000728512.pdf.jpg09b388e9e5ae0f17f132b6d95ceda004MD5310183/758082022-05-14 05:03:21.586227oai:www.lume.ufrgs.br:10183/75808Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2022-05-14T08:03:21Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
title |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
spellingShingle |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks Endres, Luiz Augusto Magalhães Escoamento turbulento Tubos Tube bank Turbulent flow Velocity fluctuations |
title_short |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
title_full |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
title_fullStr |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
title_full_unstemmed |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
title_sort |
Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks |
author |
Endres, Luiz Augusto Magalhães |
author_facet |
Endres, Luiz Augusto Magalhães Moller, Sergio Vicosa |
author_role |
author |
author2 |
Moller, Sergio Vicosa |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Endres, Luiz Augusto Magalhães Moller, Sergio Vicosa |
dc.subject.por.fl_str_mv |
Escoamento turbulento Tubos |
topic |
Escoamento turbulento Tubos Tube bank Turbulent flow Velocity fluctuations |
dc.subject.eng.fl_str_mv |
Tube bank Turbulent flow Velocity fluctuations |
description |
This paper presents the experimental analysis of the propagation of a disturbance with a fixed frequency in the incidence velocity of the cross flow through a tube bank, and its influence on the velocity fluctuations inside the bank. The disturbance is generated outside the bank by vortex shedding from an obstacle. The tube banks investigated had square arrangement and aspect ratio P/D = 1.60 and 1.26. Air was the working fluid. Measurements were performed with hot wires. Behavior of fluctuating velocities is described by means of autospectral density. The results show that the frequency of the disturbance remains unchanged as it passes through the bank, and subsists until the 4th row in spite of the high turbulence intensities and of the fact that flow velocity inside the bank varies with the position. This fact indicates that external excitations can be transferred to the solid boundaries of the bank maintaining their original frequency. Continuous Wavelet Transforms of the signals show that, in time domain, the frequency of the disturbance has an almost steady behavior. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009 |
dc.date.accessioned.fl_str_mv |
2013-07-11T02:22:32Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/75808 |
dc.identifier.issn.pt_BR.fl_str_mv |
1806-3691 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000728512 |
identifier_str_mv |
1806-3691 000728512 |
url |
http://hdl.handle.net/10183/75808 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Rio de Janeiro, RJ. vol. 31, no. 3 (July/Sept. 2009), p. 232-242 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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