Spray formation mechanism of diverging-tapered-hole GDI injector and its potentials for GDI engine applications

Moon, Seoksu; Huang, Weidi; Wang, Jin

doi:10.1016/j.fuel.2020.117519

Spray formation mechanism of diverging-tapered-hole GDI injector and its potentials for GDI engine applications

Journal Article · Fri Mar 13 00:00:00 EDT 2020 · Fuel

DOI:https://doi.org/10.1016/j.fuel.2020.117519· OSTI ID:1756039

^[1]; ^[2]; Wang, Jin ^[3]

Inha Univ. (South Korea)
National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
Argonne National Lab. (ANL), Argonne, IL (United States)

The gasoline-direct-injection market recently, which has shown the improved spray atomization and lower engine particulate emissions compared to conventional straight-hole nozzles. However, the near-nozzle spray formation mechanism associated with this atomization potential of the diverging-he potentials of the diverging-tapered-hole nozzle for GDI engine applications. The analyses focus on the in- and near-nozzle flow structure, and flow dynamics and stability outside the nozzle. We find that the results showed that the diverging-tapered-hole nozzle coupled with proper hole length generated the radially expanding crescent-moon-like flow structure in the hole that promoted the spray atomization and dispersion outside the nozzle. The expansion of the hole cross-sectional area in the diverging-tapered-hole nozzle was appeared to attenuate the mutual interactions of fuel flows in the hole from various origins that formed rather stable sprays. These flow characteristics are discussed to be promising for the compact and robust spray generation for GDI engine applications.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: Ministry of Trade, Industry and Energy (MOTIE); USDOE; USDOE Office of Science (SC), Office of Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1756039

Alternate ID(s):: OSTI ID: 1691605

Journal Information:: Fuel, Journal Name: Fuel Vol. 270; ISSN 0016-2361

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
Diverging-tapered-hole nozzle
Gasoline direct injection
Spray atomization
Spray dynamics
Spray stability
X-ray imaging

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