|SUBJECT:||M.S. Thesis Presentation|
|TIME:||Monday, November 12, 2018, 11:15 a.m.|
|PLACE:||Love Building, 210|
|TITLE:||Extinction Droplet Sizing Measurements in Diesel Relevant Sprays|
|COMMITTEE:||Dr. Caroline Genzale, Chair (ME)
Dr. Devesh Ranjan (ME)
Dr. Oleksandr (Sasha) Bibik (AE)
A new diagnostic for the quantification of Sauter Mean Diameter (SMD) in high-pressure fuel sprays has been recently developed using combined optical and x-ray measurements at the Georgia Institute of Technology and Argonne National Laboratory, respectively. This diagnostic utilizes liquid scattering extinction measurements from diffuse back-illumination (DBI) imaging, conducted at Georgia Tech, and liquid absorption measurements from x-ray radiography, conducted at Argonne. The new diagnostic, entitled the Scattering Absorption Measurement Ratio (SAMR), quantifies two-dimensional distributions of path-integrated SMD, enabling construction of the spatial history of drop size development within practical fuel sprays. This technique offers unique benefits over conventional drop-sizing methods in that it can be more robust in optically dense regions of the spray, while also providing high spatial resolution of the corresponding droplet field. The spatially-resolved SMD measurements from this diagnostic will be valuable to the engine modeling community for the quantitative validation of spray submodels.