DIGITAL IMAGE ANALYSIS OF BURNING DROPLETS IN THE PRESENCE OF BACKLIGHT DIFFRACTION AND SOOT
DOI:
https://doi.org/10.5566/ias.2015Keywords:
diffraction, burning droplets, image analysis, sootAbstract
Approaches for analyzing digital images of moving and burning fuel droplets, with the goal of accurately measuring droplet edge coordinates, are discussed. Strategies for locating droplet edges in the presence of obscuration from soot and also backlight diffraction at the droplet edge are described. An outlier detection method is employed to identify outliers in droplet edge coordinates, and the resulting data can have significantly smaller standard deviations in droplet diameters if outliers are rejected, especially for droplets that exhibit significant soot formation. The approaches described herein are applied to images from droplet combustion experiments performed on the International Space Station as well as to synthetic image sequences that were generated to enable the accuracy of the algorithms to be assessed.
References
Aharon I, Tam VK, Shaw, BD (2013). Combustion of Submillimeter Heptane/Methanol and Heptane/Ethanol Droplets in Reduced Gravity. Journal of Combustion 2016:6.
ASME (2013). Test Uncertainty. ASME Performance Test Code 19.1.
Choi MY, Dryer FL, Haggard JB, Brace MH (1988). AIP Conference Proceedings 197:338-61.
Dembia CL, Liu YC, Avedisian, CT (2012). Automated Data Analysis for Consecutive Images from Droplet Combustion Experiments. Image Analysis and Stereology 31:137–48.
Dietrich DL, Ferkul PV, Byrg VM, Nayagam V, Hicks MC, Williams FA, Dryer FL, Shaw BD, Choi MY, Avedisian CT (2013). TP-2013-216046. Cleveland:NASA Glenn Research Center.
Kaasa I (1976). A circle fitting procedure and its error analysis. IEEE Transactions on Instrumentation and Measurement IM–25:8–14.
MATLAB (2017). version 9.3.0.713579 (R2017b).
Natick: The Mathworks Inc.
Perlin K (1985). Title. Proceedings of the 12th Annual Conference on Computer Graphics and Interactive Techniques:287–96.
Reas C, Fry B (2015). Getting Started with Processing, 2nd Edition. San Francisco: Maker Media, Inc.
Perlin K (1985). The Nature of Code. Creative Commons: 2012.
Yu F, Shaw, BD (2014). Interpretation of Backlit Droplet Images from ISS Droplet Combustion Experiments. Gravitational and Space Research 2:82-93.
Downloads
Published
Issue
Section
License
Copyright (c) 2019 Image Analysis & Stereology
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
