Extremely weak hydrogen flames

Hydrogen jet diffusion flames were observed near their quenching limits. These involved downward laminar flow of hydrogen from a stainless steel hypodermic tube with an inside diameter of 0.15 mm. Near their quenching limits these flames had hydrogen flow rates of 3.9 and 2.1 μg/s in air and oxygen,...

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Bibliographic Details
Published in:Combustion and flame 2010-11, Vol.157 (11), p.2209-2210
Main Authors: Lecoustre, V.R., Sunderland, P.B., Chao, B.H., Axelbaum, R.L.
Format: Article
Language:English
Subjects:
08 HYDROGEN
AIR
Applied sciences
COMBUSTION
COMBUSTION PROPERTIES
Combustion. Flame
DIFFUSION
Diffusion flames
Energy
Energy. Thermal use of fuels
Exact sciences and technology
FLAMES
FLOW RATE
Heat release rate
HYDROGEN
JETS
LAMINAR FLOW
Microcombustors
Microflames
OXYGEN
Quenching
Quenching limits
Stainless steels
Theoretical studies. Data and constants. Metering
TUBES
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Summary:Hydrogen jet diffusion flames were observed near their quenching limits. These involved downward laminar flow of hydrogen from a stainless steel hypodermic tube with an inside diameter of 0.15 mm. Near their quenching limits these flames had hydrogen flow rates of 3.9 and 2.1 μg/s in air and oxygen, respectively. Assuming complete combustion, the associated heat release rates are 0.46 and 0.25 W. To the authors’ knowledge, these are the weakest self-sustaining steady flames ever observed.
ISSN:0010-2180
1556-2921
DOI:10.1016/j.combustflame.2010.07.024