Flame propagation and acceleration in narrow channels: sensitivity to facility specific parameters

Flame propagation experiments in stoichiometric H $$_2$$ –air are conducted a smooth 482-mm-long, 10-mm $$\times $$ square-cross-section channel, closed at the ignition end and open opposite end. Direct observation is used to track flame acceleration dynamics. The effect of facility specific parameters (i.e., energy, boundary conditions near end, window material, settling time between filling ignition) on assessed. absolute mean deviation as metric determine aforementioned collected front position data, response surface methods for experimental design applied examine inter-parameter interactions. Results show that large/small offset) have largest influence recorded with remaining playing less important role. early stages compared against theoretical predictions understand discrepancies observed data; simple acoustic model was found sufficient explain increased rates large offset cases. Finally, link oscillations during flow rate dynamics channel’s highlighted.