Slowing down and acceleration of gas combustion fronts while two-spark initiation

Experimental results of the process of combustion after single-spark and two-spark ignition of a stoichiometric propane-oxygen mixture within a test tube with the length of 170–860 mm and internal diameter of 5 mm are presented. It was found that in the area between two spots of ignition the slowing down for two combustion propagation fronts occurs and followed by front acceleration. These processes occur due to generation of oncoming gas-dynamic flows and accompanied by mutual boost of spots in the form of “spark plasmoids” that activates combustion. It was found in experiments that the electric-discharge-spark plasmoids are the key parameters for the process of ignition and combustion of a propane-oxygen mixture in a test tube.