Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods

It is well known that cavitation phenomenon in diesel injector nozzles has a strong influence on the internal flow during the injection process and spray development. However, its influence on the flow during needle opening and closing remains still unclear due to the huge difficulties related to pe...

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Autores: Salvador, F. J., Martínez López, Jorge, Caballer Fernández, Miguel|||0000-0001-9393-3077, Alfonso Laguna, Carlos De|||0000-0002-2378-021X
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:10251/45167
Acceso en línea:https://riunet.upv.es/handle/10251/45167
Access Level:acceso abierto
Palabra clave:Cavitation
Diesel
Ingection
Needle lift
Nozzle
MAQUINAS Y MOTORES TERMICOS
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spelling Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methodsSalvador, F. J.Martínez López, JorgeCaballer Fernández, Miguel|||0000-0001-9393-3077Alfonso Laguna, Carlos De|||0000-0002-2378-021XCavitationDieselIngectionNeedle liftNozzleMAQUINAS Y MOTORES TERMICOSIt is well known that cavitation phenomenon in diesel injector nozzles has a strong influence on the internal flow during the injection process and spray development. However, its influence on the flow during needle opening and closing remains still unclear due to the huge difficulties related to performing experiments at partial needle lifts. In this paper, an extended computational study has been performed in a multi-hole nozzle modeling 10 different fixed needle lifts. The internal flow has been modeled with a continuum nozzle flow model that considers the cavitating flow as a homogeneous mixture of liquid and vapour. Due to high Reynolds numbers, turbulence effects have been taken into account by RANS methods using a RNG k e model. Firstly, the code has been validated against experimental data at full needle lift conditions in terms of mass flow, momentum flux and effective velocity, showing a fairly good agreement with experimental results. Once the code has been validated, it has been possible to study in depth the internal nozzle flow and its characteristics at the outlet at different partial needle lifts. Nevertheless, not only the main flow features have been explained, but also the cavitation appearance and the turbulence development, which present huge differences between the different needle lifts simulated.The authors wish to acknowledge the Generalitat Valenciana for the financial support through the project GVA PROMETEO CMT 2010 (reference code: GR001/2009/00167539).ElsevierInstituto de Instrumentación para Imagen MolecularGeneralitat ValencianaRepositorio Institucional de la Universitat Politècnica de València Riunet20132013-02-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/45167reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengGeneralitat Valenciana https://doi.org/10.13039/501100003359 GR001%2F2009%2F00167539open 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:10251/451672026-06-13T07:49:27Z
dc.title.none.fl_str_mv Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
title Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
spellingShingle Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
Salvador, F. J.
Cavitation
Diesel
Ingection
Needle lift
Nozzle
MAQUINAS Y MOTORES TERMICOS
title_short Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
title_full Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
title_fullStr Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
title_full_unstemmed Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
title_sort Study of the influence of the needle lift on the internal flow and cavitationphenomenon in diesel injector nozzles by CFD using RANS methods
dc.creator.none.fl_str_mv Salvador, F. J.
Martínez López, Jorge
Caballer Fernández, Miguel|||0000-0001-9393-3077
Alfonso Laguna, Carlos De|||0000-0002-2378-021X
author Salvador, F. J.
author_facet Salvador, F. J.
Martínez López, Jorge
Caballer Fernández, Miguel|||0000-0001-9393-3077
Alfonso Laguna, Carlos De|||0000-0002-2378-021X
author_role author
author2 Martínez López, Jorge
Caballer Fernández, Miguel|||0000-0001-9393-3077
Alfonso Laguna, Carlos De|||0000-0002-2378-021X
author2_role author
author
author
dc.contributor.none.fl_str_mv Instituto de Instrumentación para Imagen Molecular
Generalitat Valenciana
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Cavitation
Diesel
Ingection
Needle lift
Nozzle
MAQUINAS Y MOTORES TERMICOS
topic Cavitation
Diesel
Ingection
Needle lift
Nozzle
MAQUINAS Y MOTORES TERMICOS
description It is well known that cavitation phenomenon in diesel injector nozzles has a strong influence on the internal flow during the injection process and spray development. However, its influence on the flow during needle opening and closing remains still unclear due to the huge difficulties related to performing experiments at partial needle lifts. In this paper, an extended computational study has been performed in a multi-hole nozzle modeling 10 different fixed needle lifts. The internal flow has been modeled with a continuum nozzle flow model that considers the cavitating flow as a homogeneous mixture of liquid and vapour. Due to high Reynolds numbers, turbulence effects have been taken into account by RANS methods using a RNG k e model. Firstly, the code has been validated against experimental data at full needle lift conditions in terms of mass flow, momentum flux and effective velocity, showing a fairly good agreement with experimental results. Once the code has been validated, it has been possible to study in depth the internal nozzle flow and its characteristics at the outlet at different partial needle lifts. Nevertheless, not only the main flow features have been explained, but also the cavitation appearance and the turbulence development, which present huge differences between the different needle lifts simulated.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-02-01
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/10251/45167
url https://riunet.upv.es/handle/10251/45167
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Generalitat Valenciana https://doi.org/10.13039/501100003359 GR001%2F2009%2F00167539
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
_version_ 1869402910079582208
score 15,301603

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