Electrostatic Probe Measurements in Propagating Flames : Part 1, The Relation between Flame Front Configuration and Ion Current

概要

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An experimental study has been made for ascertaining the relation between the combustion phenomena of a propagating flame and the ion current from the flame to an electrostatic probe or ionization gap. A schlieren system was simultaneously used together with the electrostatic probe to study a flame propagating through a stoichiometric propane-air mixture in a closed combustion tube in the initial pressure range from 100 to 600 mm Hg. It was found that the flame front might be disturbed by the turbulence of the unburned gas flow. The measured distance between the locations of schlieren front and maximum ion current lay in the range from 2 to 6 mm. When the flame front was disturbed, the ion current fluctuations were observed. These ion current of the flame front and were inferred to be closely to the flame front configuration.
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