Experimental study of the propagation of a far-field disturbance in the turbulent flow through square array tube banks

Detalhes bibliográficos
Autor(a) principal: Endres, Luiz Augusto Magalhães
Data de Publicação: 2009
Outros Autores: Moller, Sergio Vicosa
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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spelling 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
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dc.identifier.issn.pt_BR.fl_str_mv 1806-3691
dc.identifier.nrb.pt_BR.fl_str_mv 000728512
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dc.language.iso.fl_str_mv eng
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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
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