Characteristics of spray from a GDI fuel injector for naphtha and surrogate fuels

Handle URI:
http://hdl.handle.net/10754/622279
Title:
Characteristics of spray from a GDI fuel injector for naphtha and surrogate fuels
Authors:
Wang, Libing; Badra, Jihad A.; Roberts, William L. ( 0000-0003-1999-2831 ) ; Fang, Tiegang
Abstract:
Characterization of the spray angle, penetration, and droplet size distribution is important to analyze the spray and atomization quality. In this paper, the spray structure development and atomization characterization of two naphtha fuels, namely light naphtha (LN) and whole naphtha (WN) and two reference fuel surrogates, i.e. toluene primary reference fuel (TPRF) and primary reference fuel (PRF) were investigated using a gasoline direct injection (GDI) fuel injector. The experimental setup included a fuel injection system, a high-speed imaging system, and a droplet size measurement system. Spray images were taken by using a high-speed camera for spray angle and penetration analysis. Sauter mean diameter, Dv(10), Dv(50), Dv(90), and particle size distribution were measured using a laser diffraction technique. Results show that the injection process is very consistent for different runs and the time averaged spray angles during the measuring period are 103.45°, 102.84°, 102.46° and 107.61° for LN, WN, TPRF and PRF, respectively. The spray front remains relatively flat during the early stage of the fuel injection process. The peak penetration velocities are 80 m/s, 75 m/s, 75 m/s and 79 m/s for LN, WN, TPRF and PRF, respectively. Then velocities decrease until the end of the injection and stay relatively stable. The transient particle size and the time-averaged particle size were also analyzed and discussed. The concentration weighted average value generally shows higher values than the arithmetic average results. The average data for WN is usually the second smallest except for Dv90, of which WN is the biggest. Generally the arithmetic average particle sizes of PRF are usually the smallest, and the sizes does not change much with the measuring locations. For droplet size distribution results, LN and WN show bimodal distributions for all the locations while TPRF and PRF shows both bimodal and single peak distribution patterns. The results imply that droplet size distribution is skewed to the larger side for locations close the axis and is skewed to the smaller side for distance away from the axis.
KAUST Department:
Clean Combustion Research Center
Citation:
Wang L, Badra JA, Roberts WL, Fang T (2017) Characteristics of spray from a GDI fuel injector for naphtha and surrogate fuels. Fuel 190: 113–128. Available: http://dx.doi.org/10.1016/j.fuel.2016.11.015.
Publisher:
Elsevier BV
Journal:
Fuel
Issue Date:
18-Nov-2016
DOI:
10.1016/j.fuel.2016.11.015
Type:
Article
ISSN:
0016-2361
Sponsors:
This research was supported in part by the Saudi Aramco R&D Center through the Clean Combustion Research Center of the King Abdullah University of Science and Technology. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the funding agencies.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0016236116311103
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Libingen
dc.contributor.authorBadra, Jihad A.en
dc.contributor.authorRoberts, William L.en
dc.contributor.authorFang, Tiegangen
dc.date.accessioned2017-01-02T09:08:23Z-
dc.date.available2017-01-02T09:08:23Z-
dc.date.issued2016-11-18en
dc.identifier.citationWang L, Badra JA, Roberts WL, Fang T (2017) Characteristics of spray from a GDI fuel injector for naphtha and surrogate fuels. Fuel 190: 113–128. Available: http://dx.doi.org/10.1016/j.fuel.2016.11.015.en
dc.identifier.issn0016-2361en
dc.identifier.doi10.1016/j.fuel.2016.11.015en
dc.identifier.urihttp://hdl.handle.net/10754/622279-
dc.description.abstractCharacterization of the spray angle, penetration, and droplet size distribution is important to analyze the spray and atomization quality. In this paper, the spray structure development and atomization characterization of two naphtha fuels, namely light naphtha (LN) and whole naphtha (WN) and two reference fuel surrogates, i.e. toluene primary reference fuel (TPRF) and primary reference fuel (PRF) were investigated using a gasoline direct injection (GDI) fuel injector. The experimental setup included a fuel injection system, a high-speed imaging system, and a droplet size measurement system. Spray images were taken by using a high-speed camera for spray angle and penetration analysis. Sauter mean diameter, Dv(10), Dv(50), Dv(90), and particle size distribution were measured using a laser diffraction technique. Results show that the injection process is very consistent for different runs and the time averaged spray angles during the measuring period are 103.45°, 102.84°, 102.46° and 107.61° for LN, WN, TPRF and PRF, respectively. The spray front remains relatively flat during the early stage of the fuel injection process. The peak penetration velocities are 80 m/s, 75 m/s, 75 m/s and 79 m/s for LN, WN, TPRF and PRF, respectively. Then velocities decrease until the end of the injection and stay relatively stable. The transient particle size and the time-averaged particle size were also analyzed and discussed. The concentration weighted average value generally shows higher values than the arithmetic average results. The average data for WN is usually the second smallest except for Dv90, of which WN is the biggest. Generally the arithmetic average particle sizes of PRF are usually the smallest, and the sizes does not change much with the measuring locations. For droplet size distribution results, LN and WN show bimodal distributions for all the locations while TPRF and PRF shows both bimodal and single peak distribution patterns. The results imply that droplet size distribution is skewed to the larger side for locations close the axis and is skewed to the smaller side for distance away from the axis.en
dc.description.sponsorshipThis research was supported in part by the Saudi Aramco R&D Center through the Clean Combustion Research Center of the King Abdullah University of Science and Technology. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the funding agencies.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0016236116311103en
dc.subjectGasoline direct injection (GDI)en
dc.subjectNaphthaen
dc.subjectSurrogateen
dc.subjectSpray penetrationen
dc.subjectSpray angleen
dc.subjectParticle size distributionen
dc.titleCharacteristics of spray from a GDI fuel injector for naphtha and surrogate fuelsen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalFuelen
dc.contributor.institutionDepartment of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, United Statesen
dc.contributor.institutionFuel Technology Division, R&DC, Saudi Aramco, Dhahran, Saudi Arabiaen
kaust.authorRoberts, William L.en
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