The Effect of Catalytic Reaction on Hot Surface Ignition

The hot surface ignition of methane-air mixtures in microgravity has been studied experimentally and numerically. Experiments on the ignition of the mixtures with electrically heated nickel wires and platinum wires in microgravity have been performed. Numerical calculations, including the catalytic...

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Bibliographic Details
Published inJSME International Journal Series B Fluids and Thermal Engineering Vol. 41; no. 4; pp. 945 - 950
Main Authors KIM, Hyung-Man, ENOMOTO, Hiroshi, KATO, Hideki, TSUE, Mitsuhiro, KONO, Michikata
Format Journal Article Conference Proceeding
LanguageEnglish
Published Tokyo The Japan Society of Mechanical Engineers 01.11.1998
Japan Society of Mechanical Engineers
Japan Science and Technology Agency
Subjects
Applied sciences
Catalysis
Catalyst
Catalyst activity
Catalytic Inhibition
Combustion of gaseous fuels
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Gaseous Fuel
Hot Surface Ignition
Ignition
Methane
Microgravity
Mixtures
Nickel
Platinum
Theoretical studies. Data and constants. Metering
Wire
Methane
Numerical analysis
Platinum
Ignition
Combustion
Nickel
Experimental study
Microgravity
Catalyst
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Summary:The hot surface ignition of methane-air mixtures in microgravity has been studied experimentally and numerically. Experiments on the ignition of the mixtures with electrically heated nickel wires and platinum wires in microgravity have been performed. Numerical calculations, including the catalytic reaction rate for platinum, have been performed to understand the experimental results obtained in microgravity. The ignition delays and ignition temperatures for a wide range of equivalence ratios were investigated. experimental results show that the ignition temperatures with platinum wires have a maximum near the stoichiometric mixture ratio, while those with nickel wires increase as the equivalence ratio increases. Ignition temperatures with platinum wires are higher than those with nickel wires. Numerical results show that reactants next to platinum wires are consumed by the catalytic reaction. Therefore, a higher temperature is required to ignite mixtures with platinum wires. The catalytic inhibition of hot surface ignition is simulated successfully by the numerical model.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1340-8054
1347-5371
DOI:10.1299/jsmeb.41.945