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Analysis of spray/wall impingement using an ECN single-hole injector and a controlled-temperature wall under realistic engine conditions

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Analysis of spray/wall impingement using an ECN single-hole injector and a controlled-temperature wall under realistic engine conditions

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dc.contributor.author Peraza, Jesús E es_ES
dc.contributor.author Payri, Raul es_ES
dc.contributor.author Gimeno, Jaime es_ES
dc.contributor.author Carvallo-Garcia, Cesar es_ES
dc.date.accessioned 2023-06-20T18:01:42Z
dc.date.available 2023-06-20T18:01:42Z
dc.date.issued 2022-05-25 es_ES
dc.identifier.issn 1359-4311 es_ES
dc.identifier.uri http://hdl.handle.net/10251/194425
dc.description.abstract [EN] Spray¿wall interactions (SWI) directly affect fuel¿air mixture and emissions formation. Therefore, they are considered among the most critical physical processes in engine research nowadays. However, the physics of the wall film formation, propagation, and breakup is not fully understood yet. This work aims to use a thermoregulated steel wall to study the spray¿wall interaction phenomenon and its influence on the macroscopic spray behavior. A single-hole injector known as ``Spray D¿¿ in the Engine Combustion Network was used. n-Dodecane was employed as fuel and the wall has been positioned in four different configurations, varying angle and distance respect to the injector tip. For this work, not only diesel combustion is reproduced in the test rig due to ambient gas engine-like thermodynamic conditions, but wall temperature has been controlled to emulate characteristic values that could be found in the piston of an internal combustion engine. This implies that the spray¿wall heat transfer is simulated and its effects on ignition and spray development can be analyzed. Heat flux was measured by employing high-speed thermocouples fitted in the wall and by the use of an one-dimensional transient wall heat model. Three high speed cameras were simultaneously used to observe the SWI, one for the Schlieren optical technique which allows to study the vapor phase of the spray and to determine the ignition delay, another one to observe the natural luminosity of the flame, and finally, an intensified camera was used to determine the lift-off length by observing the chemiluminescence of the OH*. An interesting finding obtained in this work was a boundary layer formation due to the thermal diffusion that contributes to cool down the spray and to delay the high-temperature chemical reactions. Results show a substantial increment of the heat flux and the wall temperature variation with both ambient temperature and density by increasing the flame temperature and gas entrainment. The exposure to the cold wall affects the ignition delay variation with the injection pressure and the wall distance. It was found that the wall temperature (in the range of tested conditions) did not affect the lift-off length location es_ES
dc.description.sponsorship Authors would like to acknowledge Caterpillar Inc. for its support and interest in this work. The author C. Carvallo thanks the Universitat Politecnica de Valencia for his predoctoral contract (FPI-2019-S1) which is included within the framework of Programa de Apoyo para la Investigacion.. Desarrollo (PAID-01-19). Finally, the collaboration of Omar Huerta Cornejo and Sergi Soro in the laboratory work and the setup of the hardware is greatly thanked. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Applied Thermal Engineering es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Spray-wall interaction es_ES
dc.subject Post-impingement characteristics es_ES
dc.subject Engine Combustion Network es_ES
dc.subject Lift-off length es_ES
dc.subject Ignition delay es_ES
dc.subject Flame/wall heat flux es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Analysis of spray/wall impingement using an ECN single-hole injector and a controlled-temperature wall under realistic engine conditions es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.applthermaleng.2022.118167 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/UPV-VIN//PAID-01-19-17//Estudio experimental del comportamiento de chorros de inyección directa de gasolina GDI durante el impacto contra una pared en condiciones realistas de motor. / es_ES
dc.relation.projectID info:eu-repo/grantAgreement/UPV//FPI-2019-S1/ es_ES
dc.rights.accessRights Abierto es_ES
dc.date.embargoEndDate 2024-05-25 es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.description.bibliographicCitation Peraza, JE.; Payri, R.; Gimeno, J.; Carvallo-Garcia, C. (2022). Analysis of spray/wall impingement using an ECN single-hole injector and a controlled-temperature wall under realistic engine conditions. Applied Thermal Engineering. 208:1-21. https://doi.org/10.1016/j.applthermaleng.2022.118167 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.applthermaleng.2022.118167 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 21 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 208 es_ES
dc.relation.pasarela S\471302 es_ES
dc.contributor.funder Caterpillar Inc. es_ES
dc.contributor.funder Universitat Politècnica de València es_ES


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