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Analysis of condensation and secondary flows at three-way junctions using optical visualization techniques and computational fluid dynamics

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Analysis of condensation and secondary flows at three-way junctions using optical visualization techniques and computational fluid dynamics

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dc.contributor.author Galindo, José es_ES
dc.contributor.author Navarro, Roberto es_ES
dc.contributor.author Tarí, D. es_ES
dc.contributor.author Moya-Torres, Francisco es_ES
dc.date.accessioned 2022-09-20T18:03:49Z
dc.date.available 2022-09-20T18:03:49Z
dc.date.issued 2021-08 es_ES
dc.identifier.issn 0301-9322 es_ES
dc.identifier.uri http://hdl.handle.net/10251/186406
dc.description.abstract [EN] Three-way junctions are employed in almost all piping systems, whenever two streams need to be merged into one duct. In some applications, the mixing between streams plays an important role for determining the performance of downstream elements. The situation is particularly interesting for low pressure Exhaust Gas Recirculation (EGR) junctions featured in piston engines, where warm humid exhaust gases meet cold fresh air, since the mixing of both streams can produce water condensation. This condensation deteriorates the integrity and performance of the adjacent compressor wheel. This work explores the aforementioned flow configuration in a three-way junction by means of a novel gas test bench that allows the characterization of the transversal section at the junction outlet, and 3D Computer Fluid Dynamics (CFD) simulations embedded with a previously-developed condensation model. Two optical techniques are employed: laser particle image velocimetry, which is used to characterize the cross-section secondary flows, and planar laser-induced visualization, which is employed for the first time to obtain the condensation pattern. The experimental measurements are conducted at two different working points and for two different three-way junction designs, being in agreement with 3D CFD simulations. Particularly, the overall luminosity captured in the experiments presents the same trends than the numerical condensed mass fraction. This innovative validation proves that a CFD model employing a psychrometric-based condensation submodel can be used as a tool to quantify the condensation produced in a three-way junction. The proposed tools are shown to be helpful for the development of advanced LP-EGR systems to reduce NOX, CO2 and particulate matter emissions during engine warm-ups. es_ES
dc.description.sponsorship This work has been partially supported by "Conselleria de Innovacion, Universidades, Ciencia y Sociedad Digital de la Generalitat Valenciana" through grant number GV/2020/008. Francisco Moya is partially supported through a FPI-GVA-ACIF-2019 grant of the Government of Generalitat Valenciana and the European Social Fund. The authors of this paper wish to thank Alejandro Hernandez Salmeron and David Gonzalez Dominguez for his invaluable support during the laboratory setup and the experimental campaign and Jose Vicente Pastor for his support regarding the optical techniques. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof International Journal of Multiphase Flow es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Optical techniques es_ES
dc.subject Three-way junction es_ES
dc.subject In-flow condensation es_ES
dc.subject Mixing streams es_ES
dc.subject Low-pressure EGR es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Analysis of condensation and secondary flows at three-way junctions using optical visualization techniques and computational fluid dynamics es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.ijmultiphaseflow.2021.103674 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GENERALITAT VALENCIANA//ACIF%2F2019%2F026//AYUDA PREDOCTORAL GVA-MOYA TORRES. PROYECTO: CONTRIBUCION AL MODELADO DE LA CONDENSACION DE AGUA EN EL SISTEMA DE EGR DE BAJA PRESION EN OPERACION A BAJA TEMPERATURA./ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GENERALITAT VALENCIANA//GV%2F2020%2F008//ANALISIS Y MODELADO DE LA CONDENSACION EN LA LINEA DE EGR DE BAJA PRESION EN UN MOTOR DE AUTOMOCION EN CONDICIONES DE BAJA TEMPERATURA/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Galindo, J.; Navarro, R.; Tarí, D.; Moya-Torres, F. (2021). Analysis of condensation and secondary flows at three-way junctions using optical visualization techniques and computational fluid dynamics. International Journal of Multiphase Flow. 141:1-15. https://doi.org/10.1016/j.ijmultiphaseflow.2021.103674 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.ijmultiphaseflow.2021.103674 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 15 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 141 es_ES
dc.relation.pasarela S\437724 es_ES
dc.contributor.funder European Social Fund es_ES
dc.contributor.funder GENERALITAT VALENCIANA es_ES
dc.subject.ods 13.- Tomar medidas urgentes para combatir el cambio climático y sus efectos es_ES


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