Life Impact | The University of Adelaide Delivering innovative technologies for a clean energy future Centre for Energy Technology A novel algorithm to estimate soot sheet dimensions in Delft-Adelaide Flame 19 th Australasian Fluid Mechanics Conference Dr Shaun Chan Dr Paul R. Medwell Professor G.J. (Gus) Nathan Dr Shawn Kook
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Life Impact | The University of Adelaide
Delivering innovative technologies for a clean energy future
Centre for Energy Technology
A novel algorithm to estimate soot sheet dimensions in Delft-Adelaide Flame
19th Australasian Fluid Mechanics
Conference
Dr Shaun Chan
Dr Paul R. Medwell
Professor G.J. (Gus) Nathan
Dr Shawn Kook
Life Impact | The University of AdelaideSlide 1
Centre for Energy Technology
Background
Soot in turbulent flame is distributed in thin
sheets & has high intermittency
Local flame dynamics can influence soot
distribution & emission behavior
• Recirculation of reactants within fuel-rich eddies
can result in regions with high soot concentration.
• Layers with large, dense soot sheet can
penetrate reaction zone.
Soot sheet dimension & concentration
information are important to understand soot
oxidation & emission
Life Impact | The University of AdelaideSlide 2
Centre for Energy Technology
Motivation
Automated method to statistically quantify soot sheet
dimensions is desired
• To reduce manual labor.
• To improve statistical reliability.
Challenges
• Soot sheets in turbulent flames are not straight, have irregular
shapes or orientations.
• Previous studies mostly rely on over-simplistic approach that is
prone to error.
Life Impact | The University of AdelaideSlide 3
Centre for Energy Technology
Aims & methodology
Aim
• To develop an automated approach that permit statistical
quantification of soot sheets with random orientations and shapes
Methodology
• Combines & adapts two computational methods from literature:
• Qamar et al., Combustion and Flame (2011)
• Holroyd, Journal of Computing in Civil Engineering (1999)
Life Impact | The University of AdelaideSlide 4
Centre for Energy Technology
Limitation
Characteristic dimensions extracted from planar images, do not
represent the true dimensions of the 3-dimensional soot sheets
Proposed method could potentially be extended into the third
dimension with the application of parallel light sheets