Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

Gao, Ya; Huang, Weidi; Pratama, Raditya Hendra; Gong, Huifeng; Wang, Jin

doi:10.3390/mi13111944

Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

Journal Article · Thu Nov 10 00:00:00 EST 2022 · Micromachines

DOI:https://doi.org/10.3390/mi13111944· OSTI ID:2469940

Gao, Ya ^[1]; ^[2]; ^[2]; Gong, Huifeng ^[2]; Wang, Jin ^[1]

Argonne National Laboratory (ANL), Argonne, IL (United States)
National Institute of Advanced Industrial Science and Technology, Tsukuba (Japan)

A variety of needle-motion profiles are used in diesel injectors. However, it is unclear what the underlying mechanism is to determine the needle-motion profiles and how they affect the spray dynamics. It has been of significant interest to examine how the spray dynamics will change if only altering the needle valve opening speed or closing speed while all other parameters are kept the same. The different needle-motion profiles were obtained using a piezo nozzle (Nozzle #P) and a solenoid nozzle (Nozzle #S), which have identical nozzle geometry. By utilizing the X-ray imaging technique, it was observed that the average needle valve speed of Nozzle #P was 51% higher at the opening stage but 17% lower at the closing stage than Nozzle #S. When the needle valve lift is low (approximately 200 μm), the needle valve opening speed has a crucial effect on spray dynamics. The faster needle valve opening of Nozzle #P results in a 42% larger spray spreading angle and 34% lower spray velocity at the downstream field. The spray dynamics may be controllable by properly designing the needle-motion profiles in the scenarios of the low needle lifts. However, when the needle valve is sufficiently open (approximately over 200 μm), almost identical spray characteristics were observed regardless of the needle-motion profiles.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 2469940

Journal Information:: Micromachines, Journal Name: Micromachines Journal Issue: 11 Vol. 13; ISSN 2072-666X

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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chemistry
diesel spray
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physics
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x-ray imaging

Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field

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