Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling

This paper presents a numerical study analyzing the effect of pulsating flow in a variable geometry radial inflow turbine. The turbine behavior is analyzed under isentropic pulses, which are similar to those created by a rotating disk in a turbocharger test rig. Three different pulse frequencies (50...

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Autores: Galindo, José|||0000-0001-6068-182X, Navarro, Roberto|||0000-0003-2587-4954, García-Cuevas González, Luis Miguel|||0000-0001-9340-0617, Fajardo, Pablo
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/39800
Acceso en línea:https://riunet.upv.es/handle/10251/39800
Access Level:acceso abierto
Palabra clave:CFD Simulation
Pulsating flow
Radial turbine
Turbocharger
Turbine modeling
Quasi-steady assumption
INGENIERIA AEROESPACIAL
MAQUINAS Y MOTORES TERMICOS
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spelling Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modelingGalindo, José|||0000-0001-6068-182XNavarro, Roberto|||0000-0003-2587-4954García-Cuevas González, Luis Miguel|||0000-0001-9340-0617Fajardo, PabloCFD SimulationPulsating flowRadial turbineTurbochargerTurbine modelingQuasi-steady assumptionINGENIERIA AEROESPACIALMAQUINAS Y MOTORES TERMICOSThis paper presents a numerical study analyzing the effect of pulsating flow in a variable geometry radial inflow turbine. The turbine behavior is analyzed under isentropic pulses, which are similar to those created by a rotating disk in a turbocharger test rig. Three different pulse frequencies (50, 90 and 130 Hz) and two pulse amplitudes (100 and 180 kPa) were considered. Turbine flow was studied throughout the pressure pulsation cycles in a wide range of off-design operating conditions, from low pressure ratio flow detachment to high pressure ratio choked flow. An overall analysis of the phasing of instantaneous mass flow and pressure ratio was first performed and the results show the non-quasi-steady behavior of the turbine as a whole as described in the literature. However, the analysis of the flow in the different turbine components independently gives a different picture. As the turbine volute has greater length and volume than the other components, it is the main source of non-quasi-steadiness of the turbine. The stator nozzles cause fewer accumulation effects than the volute, but present a small degree of hysteretic behavior due to flow separation and reattachment cycle around the vanes. Finally, the flow in the moving rotor behaves as quasi-steady, as far as flow capacity is concerned, although the momentum transfer between exhaust gas and blades (and thus work production and thermal efficiency) is affected by a hysteretic cycle against pressure ratio, but not if blade speed ratio is considered instead. A simple model to simulate the turbine stator and rotor is proposed, based on the results obtained from the CFD computations.The authors are indebted to the Spanish Ministerio de Economia y Competitividad through Project TRA 2010-16205. The proof-reading of the paper was funded by the Universitat Politecnica de Valencia, Spain.ElsevierDepartamento de Máquinas y Motores TérmicosEscuela Técnica Superior de Ingeniería Aeroespacial y Diseño IndustrialInstituto Universitario de Investigación CMT - Clean Mobility & ThermofluidsMinisterio de Ciencia e InnovaciónUniversitat Politècnica de ValènciaRepositorio Institucional de la Universitat Politècnica de València Riunet20132013-03-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/39800reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengMinisterio de Ciencia e Innovación http://dx.doi.org/10.13039/501100004837 TRA2010-16205 SUPERACION DE LIMITES TERMOFLUIDODINAMICOS EN MICRO-MOTORES DIESEL PARA VEHICULOS HIBRIDOS ENCHUFABLESopen accesshttp://purl.org/coar/access_right/c_abf2Reserva de todos los derechoshttp://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/398002026-06-13T07:49:27Z
dc.title.none.fl_str_mv Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
title Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
spellingShingle Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
Galindo, José|||0000-0001-6068-182X
CFD Simulation
Pulsating flow
Radial turbine
Turbocharger
Turbine modeling
Quasi-steady assumption
INGENIERIA AEROESPACIAL
MAQUINAS Y MOTORES TERMICOS
title_short Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
title_full Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
title_fullStr Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
title_full_unstemmed Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
title_sort Characterization of a radial turbocharger turbine in pulsating flow by means of CFD and its application to engine modeling
dc.creator.none.fl_str_mv Galindo, José|||0000-0001-6068-182X
Navarro, Roberto|||0000-0003-2587-4954
García-Cuevas González, Luis Miguel|||0000-0001-9340-0617
Fajardo, Pablo
author Galindo, José|||0000-0001-6068-182X
author_facet Galindo, José|||0000-0001-6068-182X
Navarro, Roberto|||0000-0003-2587-4954
García-Cuevas González, Luis Miguel|||0000-0001-9340-0617
Fajardo, Pablo
author_role author
author2 Navarro, Roberto|||0000-0003-2587-4954
García-Cuevas González, Luis Miguel|||0000-0001-9340-0617
Fajardo, Pablo
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Máquinas y Motores Térmicos
Escuela Técnica Superior de Ingeniería Aeroespacial y Diseño Industrial
Instituto Universitario de Investigación CMT - Clean Mobility & Thermofluids
Ministerio de Ciencia e Innovación
Universitat Politècnica de València
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv CFD Simulation
Pulsating flow
Radial turbine
Turbocharger
Turbine modeling
Quasi-steady assumption
INGENIERIA AEROESPACIAL
MAQUINAS Y MOTORES TERMICOS
topic CFD Simulation
Pulsating flow
Radial turbine
Turbocharger
Turbine modeling
Quasi-steady assumption
INGENIERIA AEROESPACIAL
MAQUINAS Y MOTORES TERMICOS
description This paper presents a numerical study analyzing the effect of pulsating flow in a variable geometry radial inflow turbine. The turbine behavior is analyzed under isentropic pulses, which are similar to those created by a rotating disk in a turbocharger test rig. Three different pulse frequencies (50, 90 and 130 Hz) and two pulse amplitudes (100 and 180 kPa) were considered. Turbine flow was studied throughout the pressure pulsation cycles in a wide range of off-design operating conditions, from low pressure ratio flow detachment to high pressure ratio choked flow. An overall analysis of the phasing of instantaneous mass flow and pressure ratio was first performed and the results show the non-quasi-steady behavior of the turbine as a whole as described in the literature. However, the analysis of the flow in the different turbine components independently gives a different picture. As the turbine volute has greater length and volume than the other components, it is the main source of non-quasi-steadiness of the turbine. The stator nozzles cause fewer accumulation effects than the volute, but present a small degree of hysteretic behavior due to flow separation and reattachment cycle around the vanes. Finally, the flow in the moving rotor behaves as quasi-steady, as far as flow capacity is concerned, although the momentum transfer between exhaust gas and blades (and thus work production and thermal efficiency) is affected by a hysteretic cycle against pressure ratio, but not if blade speed ratio is considered instead. A simple model to simulate the turbine stator and rotor is proposed, based on the results obtained from the CFD computations.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-03-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/39800
url https://riunet.upv.es/handle/10251/39800
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Ciencia e Innovación http://dx.doi.org/10.13039/501100004837 TRA2010-16205 SUPERACION DE LIMITES TERMOFLUIDODINAMICOS EN MICRO-MOTORES DIESEL PARA VEHICULOS HIBRIDOS ENCHUFABLES
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
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
Reserva de todos los derechos
http://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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