Dynamic response of a rotating disk submerged and confined. Influence of the axial gap

In this paper, the natural frequencies and mode shapes of a rotating disk submerged and totally confined inside a rigid casing, have been obtained. These have been calculated analytically, numerically and experimentally for different axial gaps disk-casing. A simplified analytical model to analyse t...

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Autores: Presas Batlló, Alexandre|||0000-0002-6041-4139, Valentín Ruiz, David|||0000-0001-7125-0734, Egusquiza Estévez, Eduard|||0000-0003-1007-7901, Valero Ferrando, Ma. del Carmen|||0000-0002-4603-1457, Seidel, Ulrich
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/87181
Acceso en línea:https://hdl.handle.net/2117/87181
https://dx.doi.org/10.1016/j.jfluidstructs.2016.02.003
Access Level:acceso abierto
Palabra clave:Hydraulic machinery
Dynamic response
Fluid-structure interaction
Mode shapes
Natural frequencies
Rotating disk
Màquines hidràuliques
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
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repository_id_str
spelling Dynamic response of a rotating disk submerged and confined. Influence of the axial gapPresas Batlló, Alexandre|||0000-0002-6041-4139Valentín Ruiz, David|||0000-0001-7125-0734Egusquiza Estévez, Eduard|||0000-0003-1007-7901Valero Ferrando, Ma. del Carmen|||0000-0002-4603-1457Seidel, UlrichHydraulic machineryDynamic responseFluid-structure interactionMode shapesNatural frequenciesRotating diskMàquines hidràuliquesÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluidsÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluidsIn this paper, the natural frequencies and mode shapes of a rotating disk submerged and totally confined inside a rigid casing, have been obtained. These have been calculated analytically, numerically and experimentally for different axial gaps disk-casing. A simplified analytical model to analyse the dynamic response of a rotating disk submerged and confined, that has been used and validated in previous researches, is used in this case, generalised for arbitrary axial gaps disk-casing. To use this model, it is necessary to know the averaged rotating speed of the flow with respect to the disk. This parameter is obtained after an analytical discussion of the motion of the flow inside the casing where the disk rotates, and by means of CFD simulations for different axial positions of the disk. The natural frequencies of the rotating disk for the different axial confinements can be calculated following this method. A Finite Element Model has been built up to obtain the natural frequencies by means of computational simulation. The relative velocity of the flow with respect to the disk is also introduced in the simulation model in order to estimate the natural frequencies of the rotating disk. Experimental tests have been performed with a rotating disk test rig. A thin stainless steel disk (thickness of 8 mm, (h/r<5%) and mass of 7.6 kg) rotates inside a rigid casing. The position of the disk can be adjusted at several axial gaps disk-casing. A piezoelectric patch (PZT) attached on the rotating disk is used to excite the structure. Several miniature and submergible accelerometers have measured the response from the rotating frame. Excitation and measured signals are transmitted from the rotating to the stationary frame through a slip ring system. Experimental results are contrasted with the results obtained by the analytical and numerical model. Thereby, the influence of the axial gap disk-casing on the natural frequencies of a rotating disk totally confined and surrounded by a heavy fluid is determined.Peer Reviewed20162016-04-0120162016-05-19journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/87181https://dx.doi.org/10.1016/j.jfluidstructs.2016.02.003reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengMinisterio de Economía y Competitividad http://doi.org/10.13039/501100003329 DPI2012-36264 ANALISIS DE LA INTERACCION FLUIDO-ESTRUCTURA EN PERFILES HIDRAULICOS DE BAJA VORTICIDAD Y SU EFECTO EN LA RESPUESTA DINAMICA DE TURBINAS-BOMBAopen accesshttp://purl.org/coar/access_right/c_abf2http://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/871812026-05-27T15:37:01Z
dc.title.none.fl_str_mv Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
title Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
spellingShingle Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
Presas Batlló, Alexandre|||0000-0002-6041-4139
Hydraulic machinery
Dynamic response
Fluid-structure interaction
Mode shapes
Natural frequencies
Rotating disk
Màquines hidràuliques
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
title_short Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
title_full Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
title_fullStr Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
title_full_unstemmed Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
title_sort Dynamic response of a rotating disk submerged and confined. Influence of the axial gap
dc.creator.none.fl_str_mv Presas Batlló, Alexandre|||0000-0002-6041-4139
Valentín Ruiz, David|||0000-0001-7125-0734
Egusquiza Estévez, Eduard|||0000-0003-1007-7901
Valero Ferrando, Ma. del Carmen|||0000-0002-4603-1457
Seidel, Ulrich
author Presas Batlló, Alexandre|||0000-0002-6041-4139
author_facet Presas Batlló, Alexandre|||0000-0002-6041-4139
Valentín Ruiz, David|||0000-0001-7125-0734
Egusquiza Estévez, Eduard|||0000-0003-1007-7901
Valero Ferrando, Ma. del Carmen|||0000-0002-4603-1457
Seidel, Ulrich
author_role author
author2 Valentín Ruiz, David|||0000-0001-7125-0734
Egusquiza Estévez, Eduard|||0000-0003-1007-7901
Valero Ferrando, Ma. del Carmen|||0000-0002-4603-1457
Seidel, Ulrich
author2_role author
author
author
author
dc.subject.none.fl_str_mv Hydraulic machinery
Dynamic response
Fluid-structure interaction
Mode shapes
Natural frequencies
Rotating disk
Màquines hidràuliques
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
topic Hydraulic machinery
Dynamic response
Fluid-structure interaction
Mode shapes
Natural frequencies
Rotating disk
Màquines hidràuliques
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids::Màquines hidràuliques i de fluids
description In this paper, the natural frequencies and mode shapes of a rotating disk submerged and totally confined inside a rigid casing, have been obtained. These have been calculated analytically, numerically and experimentally for different axial gaps disk-casing. A simplified analytical model to analyse the dynamic response of a rotating disk submerged and confined, that has been used and validated in previous researches, is used in this case, generalised for arbitrary axial gaps disk-casing. To use this model, it is necessary to know the averaged rotating speed of the flow with respect to the disk. This parameter is obtained after an analytical discussion of the motion of the flow inside the casing where the disk rotates, and by means of CFD simulations for different axial positions of the disk. The natural frequencies of the rotating disk for the different axial confinements can be calculated following this method. A Finite Element Model has been built up to obtain the natural frequencies by means of computational simulation. The relative velocity of the flow with respect to the disk is also introduced in the simulation model in order to estimate the natural frequencies of the rotating disk. Experimental tests have been performed with a rotating disk test rig. A thin stainless steel disk (thickness of 8 mm, (h/r<5%) and mass of 7.6 kg) rotates inside a rigid casing. The position of the disk can be adjusted at several axial gaps disk-casing. A piezoelectric patch (PZT) attached on the rotating disk is used to excite the structure. Several miniature and submergible accelerometers have measured the response from the rotating frame. Excitation and measured signals are transmitted from the rotating to the stationary frame through a slip ring system. Experimental results are contrasted with the results obtained by the analytical and numerical model. Thereby, the influence of the axial gap disk-casing on the natural frequencies of a rotating disk totally confined and surrounded by a heavy fluid is determined.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-04-01
2016
2016-05-19
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/87181
https://dx.doi.org/10.1016/j.jfluidstructs.2016.02.003
url https://hdl.handle.net/2117/87181
https://dx.doi.org/10.1016/j.jfluidstructs.2016.02.003
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad http://doi.org/10.13039/501100003329 DPI2012-36264 ANALISIS DE LA INTERACCION FLUIDO-ESTRUCTURA EN PERFILES HIDRAULICOS DE BAJA VORTICIDAD Y SU EFECTO EN LA RESPUESTA DINAMICA DE TURBINAS-BOMBA
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2

http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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