The influence of Kr, CO2, and iso-C4H8 admixtures on the time of the formation of a stable flame front in mixtures of natural gas and isobutylene with oxygen and hydrogen with air under initiation with a spark discharge |
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Authors: | N M Rubtsov B S Seplyarskii V I Chernysh and G I Tsvetkov |
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Institution: | (1) Department of Aerospace Engineering, Nagoya University, Nagoya, Japan |
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Abstract: | High-speed color filming was used to study laminar spherical flame propagation at the initial stage in preliminarily mixed
stoichiometric mixtures of natural gas and isobutylene with oxygen containing krypton and carbon dioxide and in hydrogen-air
mixtures at atmospheric pressure in a bomb with a constant volume. Under experimental conditions (T
0 = 298 K, p
0 = 100 torr, spark discharge energy E
0 = 0.91 J), the dilution of mixtures with Kr and CO2 increased the time of formation of a stable flame front by more than 10 times. The introduction of a small chemically active
admixture (1.2% isobutylene) into a stoichiometric mixture of hydrogen and air sharply increased the time of formation of
a stable flame front, which was evidence of an important role played by the chemical mechanism of the reaction in the formation
of the combustion field. |
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Keywords: | |
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