Flame propagation of premixed gas explosion with different equivalent ratio under corrugated fire-retardant core

Based on the self-built experimental setup, propagation law of explosion flame hydrogen/methane premixed gas with different hydrogen volume fractions in equivalent ratios was investigated under action a corrugated fire-retardant core. The study shows that isolation and suppression effect core at equivalence is either promoted or suppressed, quenched without mixing when ?=0.8and1.0, also ?=1.2indifferent fractions. flame-retardant significantly affected extinguishing ?=1.2, speed overpressure showed similar trend hydrogen. When quenched, depressed inward to form reverse spherical cell flame, diffusion combustion phenomen occurs, it lasts long time, eventually, reaction extinguished. penetrated during rest conditions. ?=1.0, most violent, its jump rapidly until reaches peak.