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Experimental analysis on the influence of nozzle geometry over the dispersion of liquid n-dodecane sprays

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Experimental analysis on the influence of nozzle geometry over the dispersion of liquid n-dodecane sprays

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dc.contributor.author Payri, Raul es_ES
dc.contributor.author Salvador, F.J. es_ES
dc.contributor.author Gimeno, Jaime es_ES
dc.contributor.author Viera-Sotillo, Juan Pablo es_ES
dc.date.accessioned 2018-01-11T14:09:11Z
dc.date.available 2018-01-11T14:09:11Z
dc.date.issued 2015 es_ES
dc.identifier.uri http://hdl.handle.net/10251/94542
dc.description.abstract [EN] Understanding and controlling mixing and combustion processes is fundamental in order to face the challenges set by the ever more demanding pollutant regulations and fuel consumption standards of direct injection diesel engines. The fundamentals of these processes haven been long studied by the diesel spray community from both experimental and numerical perspectives. However, certain topics, such as the influence of nozzle geometry over the spray atomization, mixing, and combustion process, are still not completely well understood and predicted by numerical models. The present study seeks to contribute to the current understanding of this subject, by performing state of the art optical diagnostics to liquid sprays injected through two singe-hole nozzles of different conicity. The experiments were carried out in a nitrogen-filled constantpressure-flow facility. Back pressures were set to produce the desired engine-like density conditions in the chamber, at room temperature. The experimental setup consists in a diffused back-illumination setup with a fast pulsed LED light source and a high-speed camera. The diagnostics focused on detecting the liquid spray contour and evaluating the influence of nozzle geometry over the time-resolved and quasi-steady response of the spray dispersion, at similar injection conditions. Results show a clear influence of nozzle geometry on spray contour fluctuations, where the cylindrical nozzle seems to produce larger dispersion in both time-resolved fluctuations and quasi-steady values, when compared to the conical nozzle. This evidences that the turbulence and radial velocity profiles originated at the cylindrical nozzle geometry are able to affect not only the microscopic scales inside the nozzle, but also macroscopic scales, such as the steady spray. Observations from this study indicate that the effects of the flow characteristics within the nozzle are carried on to the first millimeters of the spray, in which the rest of the spray formation downstream is pre-defined. es_ES
dc.description.sponsorship This work was sponsored by Ministerio de Economía y Competitividad of the Spanish Government in the frame of the Project “Comprensión de la influencia de combustibles no convencionales en el proceso de inyección y combustión tipo diesel,” Reference TRA2012-36932. Additionally, the optical equipment used for the project was purchased with funding from Ministerio de Economía y Competitividad FEDER-ICTS-2012-06. The authors would finally like to thank José Enrique Del Rey and María del Carmen Tomás for their collaboration in the setup of the experiments and laboratory work.
dc.language Inglés es_ES
dc.publisher Frontiers Media SA es_ES
dc.relation MINECO/TRA2012-36932 es_ES
dc.relation MINECO/FEDER-ICTS-2012-06 es_ES
dc.relation.ispartof Frontiers in Mechanical Engineering es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Diesel es_ES
dc.subject Spray es_ES
dc.subject Nozzle es_ES
dc.subject Mixing es_ES
dc.subject Injection es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title Experimental analysis on the influence of nozzle geometry over the dispersion of liquid n-dodecane sprays es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3389/fmech.2015.00013 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 Payri, R.; Salvador, F.; Gimeno, J.; Viera-Sotillo, JP. (2015). Experimental analysis on the influence of nozzle geometry over the dispersion of liquid n-dodecane sprays. Frontiers in Mechanical Engineering. 1. doi:10.3389/fmech.2015.00013 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.3389/fmech.2015.00013 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 1 es_ES
dc.identifier.eissn 2297-3079 es_ES
dc.relation.pasarela 304425 es_ES
dc.contributor.funder MInisterio de Economía, Industria y Competitividad (MINECO es_ES
dc.contributor.funder Ministerio de Economía y Competitividad (MINECO) es_ES


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