Peering through the flames: imaging techniques for reacting aluminum powders

Zepper, Ethan T.; Pantoya, Michelle L.; Bhattacharya, Sukalyan; Marston, Jeremy O.; Neuber, Andreas A.; Heaps, Ronald J.

doi:10.1364/AO.56.002535

Title: Peering through the flames: imaging techniques for reacting aluminum powders

Journal Article · Fri Mar 17 00:00:00 EDT 2017 · Applied Optics

DOI:https://doi.org/10.1364/AO.56.002535· OSTI ID:1367530

Zepper, Ethan T. ^[1]; Pantoya, Michelle L. ^[1]; Bhattacharya, Sukalyan ^[1]; Marston, Jeremy O. ^[2]; Neuber, Andreas A. ^[3]; Heaps, Ronald J. ^[4]

Texas Tech Univ., Lubbock, TX (United States). Mechanical Engineering Dept.
Texas Tech Univ., Lubbock, TX (United States). Chemical Engineering Dept.
Texas A & M Univ., College Station, TX (United States). Electrical Engineering Dept.
Idaho National Lab. (INL), Idaho Falls, ID (United States)

Combusting metals burn at high temperatures and emit high-intensity radiation in the visible spectrum which can over-saturate regular imaging sensors and obscure the field of view. Filtering the luminescence can result in limited information and hinder thorough combustion characterization. A method for “seeing through the flames” of a highly luminescent aluminum powder reaction is presented using copper vapor laser (CVL) illumination synchronized with a high-speed camera. A statistical comparison of combusting aluminum particle agglomerate between filtered halogen and CVL illumination shows the effectiveness of this diagnostic approach. When ignited by an electrically induced plasma, aluminum particles are entrained as solid agglomerates that rotate about their centers of mass and are surrounded by emitted, burning gases. Furthermore, the average agglomerate diameter appears to be 160 micrometers when viewed with standard illumination and a high-speed camera. But, a significantly lower diameter of 50 micrometers is recorded when imaged with CVL illumination. Our results advocate that alternative imaging techniques are required to resolve the complexities of metal particle combustion.

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Research Organization:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC07-05ID14517; W911NF-14-1-0250; 16-081

OSTI ID:: 1367530

Alternate ID(s):: OSTI ID: 1619693

Report Number(s):: INL/JOU-16-40543; APOPAI

Journal Information:: Applied Optics, Vol. 56, Issue 9; ISSN 0003-6935

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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