Spray Modeling for Outwardly-Opening Hollow-Cone Injector

Handle URI:
http://hdl.handle.net/10754/618130
Title:
Spray Modeling for Outwardly-Opening Hollow-Cone Injector
Authors:
Sim, Jaeheon ( 0000-0003-1441-7344 ) ; Badra, Jihad; Elwardani, Ahmed Elsaid ( 0000-0002-2536-2089 ) ; Im, Hong G. ( 0000-0001-7080-1266 )
Abstract:
The outwardly-opening piezoelectric injector is gaining popularity as a high efficient spray injector due to its precise control of the spray. However, few modeling studies have been reported on these promising injectors. Furthermore, traditional linear instability sheet atomization (LISA) model was originally developed for pressure swirl hollow-cone injectors with moderate spray angle and toroidal ligament breakups. Therefore, it is not appropriate for the outwardly-opening injectors having wide spray angles and string-like film structures. In this study, a new spray injection modeling was proposed for outwardly-opening hollow-cone injector. The injection velocities are computed from the given mass flow rate and injection pressure instead of ambiguous annular nozzle geometry. The modified Kelvin-Helmholtz and Rayleigh-Taylor (KH-RT) breakup model is used with adjusted initial Sauter mean diameter (SMD) for modeling breakup of string-like structure. Spray injection was modeled using a Lagrangian discrete parcel method within the framework of commercial CFD software CONVERGE, and the new model was implemented through the user-defined functions. A Siemens outwardly-opening hollow-cone spray injector was characterized and validated with existing experimental data at the injection pressure of 100 bar. It was found that the collision modeling becomes important in the current injector because of dense spray near nozzle. The injection distribution model showed insignificant effects on spray due to small initial droplets. It was demonstrated that the new model can predict the liquid penetration length and local SMD with improved accuracy for the injector under study.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
Sim, J., Badra, J., Elwardany, A., and Im, H., "Spray Modeling for Outwardly-Opening Hollow-Cone Injector," SAE Technical Paper 2016-01-0844, 2016, doi:10.4271/2016-01-0844.
Publisher:
SAE International
Journal:
SAE Technical Paper Series
Conference/Event name:
SAE 2016 World Congress and Exhibition
Issue Date:
5-Apr-2016
DOI:
10.4271/2016-01-0844
Type:
Conference Paper
Sponsors:
This work was sponsored by the Fuel Technology Division at Saudi Aramco R&DC. The work at King Abdullah University of Science and Technology (KAUST) was funded by KAUST and Saudi Aramco under the FUELCOM program. We also acknowledge the help and support from Convergent Science Inc. (CSI).
Additional Links:
http://papers.sae.org/2016-01-0844/
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorSim, Jaeheonen
dc.contributor.authorBadra, Jihaden
dc.contributor.authorElwardani, Ahmed Elsaiden
dc.contributor.authorIm, Hong G.en
dc.date.accessioned2016-08-10T08:08:26Z-
dc.date.available2016-08-10T08:08:26Z-
dc.date.issued2016-04-05-
dc.identifier.citationSim, J., Badra, J., Elwardany, A., and Im, H., "Spray Modeling for Outwardly-Opening Hollow-Cone Injector," SAE Technical Paper 2016-01-0844, 2016, doi:10.4271/2016-01-0844.en
dc.identifier.doi10.4271/2016-01-0844-
dc.identifier.urihttp://hdl.handle.net/10754/618130-
dc.description.abstractThe outwardly-opening piezoelectric injector is gaining popularity as a high efficient spray injector due to its precise control of the spray. However, few modeling studies have been reported on these promising injectors. Furthermore, traditional linear instability sheet atomization (LISA) model was originally developed for pressure swirl hollow-cone injectors with moderate spray angle and toroidal ligament breakups. Therefore, it is not appropriate for the outwardly-opening injectors having wide spray angles and string-like film structures. In this study, a new spray injection modeling was proposed for outwardly-opening hollow-cone injector. The injection velocities are computed from the given mass flow rate and injection pressure instead of ambiguous annular nozzle geometry. The modified Kelvin-Helmholtz and Rayleigh-Taylor (KH-RT) breakup model is used with adjusted initial Sauter mean diameter (SMD) for modeling breakup of string-like structure. Spray injection was modeled using a Lagrangian discrete parcel method within the framework of commercial CFD software CONVERGE, and the new model was implemented through the user-defined functions. A Siemens outwardly-opening hollow-cone spray injector was characterized and validated with existing experimental data at the injection pressure of 100 bar. It was found that the collision modeling becomes important in the current injector because of dense spray near nozzle. The injection distribution model showed insignificant effects on spray due to small initial droplets. It was demonstrated that the new model can predict the liquid penetration length and local SMD with improved accuracy for the injector under study.en
dc.description.sponsorshipThis work was sponsored by the Fuel Technology Division at Saudi Aramco R&DC. The work at King Abdullah University of Science and Technology (KAUST) was funded by KAUST and Saudi Aramco under the FUELCOM program. We also acknowledge the help and support from Convergent Science Inc. (CSI).en
dc.publisherSAE Internationalen
dc.relation.urlhttp://papers.sae.org/2016-01-0844/en
dc.rightsArchived with thanks to SAE 2016 World Congress and Exhibitionen
dc.titleSpray Modeling for Outwardly-Opening Hollow-Cone Injectoren
dc.typeConference Paperen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSAE Technical Paper Seriesen
dc.conference.dateApril 12-14, 2016en
dc.conference.nameSAE 2016 World Congress and Exhibitionen
dc.conference.locationCobo Center Detroit, MI, USAen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSaudi Aramcoen
kaust.authorSim, Jaeheonen
kaust.authorElwardani, Ahmed Elsaiden
kaust.authorIm, Hongen
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