I114 A Study on High Speed Flame Propagation in Closed Vessel narrower than Quenching Distance

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  • I114 消炎距離以下の密閉空間における高速火炎伝播に関する研究

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In this study, the mechanism of high speed flame propagation in narrow combustion chamber have been experimentally investigated with a high speed video camera. The combustion chamber has a narrow channel of which width are variable ranging L=1-2mm was used. The propane / air and methane / air mixture were ignited at the large cavity which was equipped at the one end of the narrow channel. Results showed that, the flame could be propagated through the L=1 and 2mm channel for the both of CH4 / air and C3H3 / air mixture although the channel width was less than those quenching distance. Moreover, it was found that the maximum flame speed in the combustion chamber was over 1.5 times higher than the laminar burning velocity.

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