314 希薄予混合火炎を通過する燃料液滴の着火挙動

概要

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An experimental study has been made of the ignition and combustion of fuel droplets subjected to a laminar flame propagating through a lean fuel-air mixture, as a fundamental study for revealing the combustion phenomena of fuel vapor-air-fuel droplet system. A combustion chamber was installed with spark electrodes, for propagating flame formation near the side wall, and with a quartz fiber for suspending single n-hexane droplet in the chamber center. Schlieren image of the fuel droplet in the propagating flame of lean propane-air mixtures was observed by a high-speed video camera. The results showed that the ignition distance decreased with an increase in initial mixture pressure, and increased with an increase in mixture equivalence ratio. The ignition delay was unaffected by initial mixture pressure.
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