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Comparative study of the internal flow in diesel injection nozzles at cavitating conditions at different needle lifts with steady and transient simulations approaches

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Comparative study of the internal flow in diesel injection nozzles at cavitating conditions at different needle lifts with steady and transient simulations approaches

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dc.contributor.author Salvador, Francisco Javier es_ES
dc.contributor.author De La Morena, Joaquín es_ES
dc.contributor.author Crialesi Esposito, Marco es_ES
dc.contributor.author Martínez López, Jorge es_ES
dc.date.accessioned 2019-10-02T06:16:35Z
dc.date.available 2019-10-02T06:16:35Z
dc.date.issued 2018 es_ES
dc.identifier.issn 0954-4070 es_ES
dc.identifier.uri http://hdl.handle.net/10251/126941
dc.description.abstract [EN] The motion of the needle during the injection process of a diesel injector has a marked influence on the internal flow, the fuel characteristics at the nozzle exit, the spray pattern and the fuel-air mixing process. The current paper is focused on the computational study of the internal flow and cavitation phenomena during the injection process, with inclusion of the opening where the needle is working at partial lifts. This study has been performed with a homogeneous equilibrium model (OpenFOAM) customized by the authors to simulate the real motion of the needle. The first part of the study covers the analysis of the whole injection process with a moving mesh using the boundary conditions provided by a one-dimensional (1D) model of the injector created in AMESim. This 1D model has offered the possibility of reproducing the movement of the needle with real lift law and real injection pressure evolution during the injection. Thus, it has been possible to compare the injection rate profiles provided by OpenFOAM against those obtained both in AMESim and experimentally. The second part compares the differences in mass flow, momentum flux, effective velocity and cavitation appearance between steady (fixed lifts) and transient (moving mesh) simulations. The aim of this comparison is to establish the differences between these two approaches. On the one hand is a more realistic approach in its use of transient simulations of the injection process and where the needle movement is taken into account. On the other hand, is the use of steady simulations at partial needle lifts. This analysis could be of interest to researchers devoted to the study of the diesel injection process since it could help to delimit the uncertainties involved in using the second approach which is more easily carried out, versus the first which is supposed to provide more realistic results. es_ES
dc.description.sponsorship The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was partly sponsored by the 'Ministerio de Economa y Competitividad' of the Spanish Government, in the frame of the Project 'Estudio de la interaccion chorro-pared en condiciones realistas de motor', Reference TRA2015-67679-c2-1-R. es_ES
dc.language Inglés es_ES
dc.publisher SAGE Publications es_ES
dc.relation MINECO/TRA2015-67679-C2-1-R es_ES
dc.relation.ispartof Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Cavitation es_ES
dc.subject Needle lift es_ES
dc.subject Moving mesh es_ES
dc.subject Diesel es_ES
dc.subject Nozzle es_ES
dc.subject CFD es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Comparative study of the internal flow in diesel injection nozzles at cavitating conditions at different needle lifts with steady and transient simulations approaches es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1177/0954407017725672 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 Salvador, FJ.; De La Morena, J.; Crialesi Esposito, M.; Martínez López, J. (2018). Comparative study of the internal flow in diesel injection nozzles at cavitating conditions at different needle lifts with steady and transient simulations approaches. Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering. 232(8):1060-1078. https://doi.org/10.1177/0954407017725672 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1177/0954407017725672 es_ES
dc.description.upvformatpinicio 1060 es_ES
dc.description.upvformatpfin 1078 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 232 es_ES
dc.description.issue 8 es_ES
dc.relation.pasarela S\364940 es_ES
dc.contributor.funder Ministerio de Economía, Industria y Competitividad es_ES


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