Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level

Detailed imaging of n-dodecane and ethanol sprays injected in a constant-flow, high-pressure, high-temperature optically accessible chamber was per-formed. High-speed, diffused back-illuminated long-distance microscopy was used to resolve the spray structure in the near-nozzle field. The effect of i...

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Detalles Bibliográficos
Autores: Manin, J., Bardi, M., Pickett, L. M., Payri, Raul|||0000-0001-7428-5510
Tipo de recurso: artículo
Fecha de publicación:2016
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:10251/83245
Acceso en línea:https://riunet.upv.es/handle/10251/83245
Access Level:acceso abierto
Palabra clave:Injection
Sprays
Fuels
Microscopy
MAQUINAS Y MOTORES TERMICOS
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spelling Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic levelManin, J.Bardi, M.Pickett, L. M.Payri, Raul|||0000-0001-7428-5510InjectionSpraysFuelsMicroscopyMAQUINAS Y MOTORES TERMICOSDetailed imaging of n-dodecane and ethanol sprays injected in a constant-flow, high-pressure, high-temperature optically accessible chamber was per-formed. High-speed, diffused back-illuminated long-distance microscopy was used to resolve the spray structure in the near-nozzle field. The effect of injection and ambient pressures, as well as fuel temperature and composition have been studied through measurements of the spray penetration rates, hydraulic delays and spreading angles. Additional information such as transient flow velocities have been extracted from the measurements and compared to a control-volume spray model. The analysis demonstrated the influence of outlet flow on spray development with lower penetration velocities and wider spreading angles during the transients (start and end of injection) than during the quasi-steady period of the injection. The effect of fuel com-position on penetration was limited, while spreading angle measurements showed wider sprays for ethanol. In contrast, varying fuel temperature led to varying penetration velocities, while spreading angle remained constant during the quasi-steady period of the injection. Fuel temperature affected injector performance, with shorter delays as fuel temperature was increased. The comparisons between predicted and measured penetration rates showed differences suggesting that the transient behavior of the spreading angle of the sprays modified spray development significantly in the near-field. The reasonable agreement between predicted and measured flow velocity at and after the end of injection suggested that the complete mixing assumptions made by the model were valid in the near nozzle region during this period, when injected flow velocities are reduced.The authors wish to thank Chris Carlen from Sandia National Laboratories for designing and manufacturing specific ultra-fast LEDs, as well as Jose Enrique del Rey and Juan Pablo Viera from CMT-Motores Termicos for their support during the experiments. Support for the research carried out by Julien Manin at CMT-Motores Termicos was provided by the U.S. Department of Energy, Office of Vehicle Technologies. Sandia is a multi-program laboratory operated by Sandia Corporation, a Lockheed Martin Company for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.ElsevierDepartamento de Máquinas y Motores TérmicosInstituto Universitario de Investigación CMT - Clean Mobility & ThermofluidsEscuela Técnica Superior de Ingeniería IndustrialU.S. Department of EnergyRepositorio Institucional de la Universitat Politècnica de València Riunet20162016-07-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://riunet.upv.es/handle/10251/83245reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengU.S. Department of Energy https://doi.org/10.13039/100000015 DE-AC04-94AL85000open 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:10251/832452026-06-13T07:49:27Z
dc.title.none.fl_str_mv Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
title Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
spellingShingle Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
Manin, J.
Injection
Sprays
Fuels
Microscopy
MAQUINAS Y MOTORES TERMICOS
title_short Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
title_full Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
title_fullStr Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
title_full_unstemmed Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
title_sort Boundary condition and fuel composition effects on injection processes of high-pressure sprays at the microscopic level
dc.creator.none.fl_str_mv Manin, J.
Bardi, M.
Pickett, L. M.
Payri, Raul|||0000-0001-7428-5510
author Manin, J.
author_facet Manin, J.
Bardi, M.
Pickett, L. M.
Payri, Raul|||0000-0001-7428-5510
author_role author
author2 Bardi, M.
Pickett, L. M.
Payri, Raul|||0000-0001-7428-5510
author2_role author
author
author
dc.contributor.none.fl_str_mv Departamento de Máquinas y Motores Térmicos
Instituto Universitario de Investigación CMT - Clean Mobility & Thermofluids
Escuela Técnica Superior de Ingeniería Industrial
U.S. Department of Energy
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Injection
Sprays
Fuels
Microscopy
MAQUINAS Y MOTORES TERMICOS
topic Injection
Sprays
Fuels
Microscopy
MAQUINAS Y MOTORES TERMICOS
description Detailed imaging of n-dodecane and ethanol sprays injected in a constant-flow, high-pressure, high-temperature optically accessible chamber was per-formed. High-speed, diffused back-illuminated long-distance microscopy was used to resolve the spray structure in the near-nozzle field. The effect of injection and ambient pressures, as well as fuel temperature and composition have been studied through measurements of the spray penetration rates, hydraulic delays and spreading angles. Additional information such as transient flow velocities have been extracted from the measurements and compared to a control-volume spray model. The analysis demonstrated the influence of outlet flow on spray development with lower penetration velocities and wider spreading angles during the transients (start and end of injection) than during the quasi-steady period of the injection. The effect of fuel com-position on penetration was limited, while spreading angle measurements showed wider sprays for ethanol. In contrast, varying fuel temperature led to varying penetration velocities, while spreading angle remained constant during the quasi-steady period of the injection. Fuel temperature affected injector performance, with shorter delays as fuel temperature was increased. The comparisons between predicted and measured penetration rates showed differences suggesting that the transient behavior of the spreading angle of the sprays modified spray development significantly in the near-field. The reasonable agreement between predicted and measured flow velocity at and after the end of injection suggested that the complete mixing assumptions made by the model were valid in the near nozzle region during this period, when injected flow velocities are reduced.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-07-01
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/10251/83245
url https://riunet.upv.es/handle/10251/83245
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv U.S. Department of Energy https://doi.org/10.13039/100000015 DE-AC04-94AL85000
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 15,301603

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