skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Quantification of sauter mean diameter in diesel sprays using scattering-absorption extinction measurements

Abstract

Quantitative measurements of the primary breakup process in diesel sprays are lacking due to a range of experimental and diagnostic challenges, including: high droplet number density environments, very small characteristic drop size scales (~1-10 μm), and high characteristic velocities in the primary breakup region (~600 m/s). Due to these challenges, existing measurement techniques have failed to resolve a sufficient range of the temporal and spatial scales involved and much remains unknown about the primary atomization process in practical diesel sprays. To gain a better insight into this process, we have developed a joint visible and x-ray extinction measurement technique to quantify axial and radial distributions of the path-integrated Sauter Mean Diameter (SMD) and Liquid Volume Fraction (LVF) for diesel-like sprays. This technique enables measurement of the SMD in regions of moderate droplet number density, enabling construction of the temporal history of drop size development within practical diesel sprays. The experimental campaign was conducted jointly at the Georgia Institute of Technology and Argonne National Laboratory using the Engine Combustion Network “Spray D” injector. X-ray radiography liquid absorption measurements, conducted at the Advanced Photon Source at Argonne, quantify the liquid-fuel mass and volume distribution in the spray. Diffused back-illumination liquid scattering measurementsmore » were conducted at Georgia Tech to quantify the optical thickness throughout the spray. By application of Mie-scatter equations, the ratio of the absorption and scattering extinction measurements is demonstrated to yield solutions for the SMD. This work introduces the newly developed scattering-absorption measurement technique and highlights the important considerations that must be taken into account when jointly processing these measurements to extract the SMD. These considerations include co-alignment of measurements taken at different institutions, identification of viable regions where the measurement ratio can be accurately interpreted, and uncertainty analysis in the measurement ratio and resulting SMD. Because the measurement technique provides the spatial history of the SMD development, it is expected to be especially informative to the diesel spray modeling community. Results from this work will aid in understanding the effect of ambient densities and injection pressures on primary breakup and help assess the appropriateness of spray submodels for engine computational fluid dynamics codes.« less

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Georgia Tech Research Corp.
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1373298
Report Number(s):
DOE-GATECH-0007333
DOE Contract Number:  
EE0007333
Resource Type:
Conference
Resource Relation:
Conference: 29th Annual Conference of the Institute for Liquid Atomization and Spraying Systems (ILASS)-Americas Conference, Atlanta, GA, May 2017
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Martinez, Gabrielle L, Magnotti, Gina M, Knox, Benjamin W, Genzale, Caroline L, Matusik, Katarzyna E, Duke, Daniel J, Powell, Christopher F, and Kastengren, Alan L. Quantification of sauter mean diameter in diesel sprays using scattering-absorption extinction measurements. United States: N. p., 2017. Web.
Martinez, Gabrielle L, Magnotti, Gina M, Knox, Benjamin W, Genzale, Caroline L, Matusik, Katarzyna E, Duke, Daniel J, Powell, Christopher F, & Kastengren, Alan L. Quantification of sauter mean diameter in diesel sprays using scattering-absorption extinction measurements. United States.
Martinez, Gabrielle L, Magnotti, Gina M, Knox, Benjamin W, Genzale, Caroline L, Matusik, Katarzyna E, Duke, Daniel J, Powell, Christopher F, and Kastengren, Alan L. Thu . "Quantification of sauter mean diameter in diesel sprays using scattering-absorption extinction measurements". United States. doi:. https://www.osti.gov/servlets/purl/1373298.
@article{osti_1373298,
title = {Quantification of sauter mean diameter in diesel sprays using scattering-absorption extinction measurements},
author = {Martinez, Gabrielle L and Magnotti, Gina M and Knox, Benjamin W and Genzale, Caroline L and Matusik, Katarzyna E and Duke, Daniel J and Powell, Christopher F and Kastengren, Alan L},
abstractNote = {Quantitative measurements of the primary breakup process in diesel sprays are lacking due to a range of experimental and diagnostic challenges, including: high droplet number density environments, very small characteristic drop size scales (~1-10 μm), and high characteristic velocities in the primary breakup region (~600 m/s). Due to these challenges, existing measurement techniques have failed to resolve a sufficient range of the temporal and spatial scales involved and much remains unknown about the primary atomization process in practical diesel sprays. To gain a better insight into this process, we have developed a joint visible and x-ray extinction measurement technique to quantify axial and radial distributions of the path-integrated Sauter Mean Diameter (SMD) and Liquid Volume Fraction (LVF) for diesel-like sprays. This technique enables measurement of the SMD in regions of moderate droplet number density, enabling construction of the temporal history of drop size development within practical diesel sprays. The experimental campaign was conducted jointly at the Georgia Institute of Technology and Argonne National Laboratory using the Engine Combustion Network “Spray D” injector. X-ray radiography liquid absorption measurements, conducted at the Advanced Photon Source at Argonne, quantify the liquid-fuel mass and volume distribution in the spray. Diffused back-illumination liquid scattering measurements were conducted at Georgia Tech to quantify the optical thickness throughout the spray. By application of Mie-scatter equations, the ratio of the absorption and scattering extinction measurements is demonstrated to yield solutions for the SMD. This work introduces the newly developed scattering-absorption measurement technique and highlights the important considerations that must be taken into account when jointly processing these measurements to extract the SMD. These considerations include co-alignment of measurements taken at different institutions, identification of viable regions where the measurement ratio can be accurately interpreted, and uncertainty analysis in the measurement ratio and resulting SMD. Because the measurement technique provides the spatial history of the SMD development, it is expected to be especially informative to the diesel spray modeling community. Results from this work will aid in understanding the effect of ambient densities and injection pressures on primary breakup and help assess the appropriateness of spray submodels for engine computational fluid dynamics codes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 18 00:00:00 EDT 2017},
month = {Thu May 18 00:00:00 EDT 2017}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: