Measurements of droplet size in shear-driven atomization using ultra-small angle x-ray scattering

Kastengren, A.; Ilavsky, J.; Viera, Juan Pablo; Payri, Raul; Duke, D. J.; Swantek, A.; Tilocco, F. Zak; Sovis, N.; Powell, C. F.

doi:10.1016/j.ijmultiphaseflow.2017.03.005

Measurements of droplet size in shear-driven atomization using ultra-small angle x-ray scattering

Journal Article · Thu Mar 16 00:00:00 EDT 2017 · International Journal of Multiphase Flow

DOI:https://doi.org/10.1016/j.ijmultiphaseflow.2017.03.005· OSTI ID:1373736

Kastengren, A. ^[1]; Ilavsky, J. ^[1]; Viera, Juan Pablo ^[2]; Payri, Raul ^[2]; Duke, D. J. ^[1]; Swantek, A. ^[1]; Tilocco, F. Zak ^[3]; Sovis, N. ^[1]; Powell, C. F. ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. Politecnica de Valencia (Spain)
Argonne National Lab. (ANL), Argonne, IL (United States); Michigan State Univ., East Lansing, MI (United States)

Measurements of droplet size in optically-thick, non-evaporating, shear-driven sprays have been made using ultra-small angle x-ray scattering (USAXS). The sprays are produced by orifice-type nozzles coupled to diesel injectors, with measurements conducted from 1 – 24 mm from the orifice, spanning from the optically-dense near-nozzle region to more dilute regions where optical diagnostics are feasible. The influence of nozzle diameter, liquid injection pressure, and ambient density were examined. The USAXS measurements reveal few if any nanoscale droplets, in conflict with a popular computational model of diesel spray breakup. The average droplet diameter rapidly decreases with downstream distance from the nozzle until a plateau value is reached, after which only small changes are seen in droplet diameter. This plateau droplet size is consistent with the droplets being small enough to be stable with respect to further breakup. As a result, liquid injection pressure and nozzle diameter have the biggest impact on droplet size, while ambient density has a smaller effect.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1373736

Alternate ID(s):: OSTI ID: 1416038

Journal Information:: International Journal of Multiphase Flow, Journal Name: International Journal of Multiphase Flow Journal Issue: C Vol. 92; ISSN 0301-9322

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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