The tempo‐spatial evolution of the combustion kernel in gas phase explosions was experimentally investigated using Schlieren photography.
Methane and propane ‐air explosions were initiated in a cylindrical explosion vessel at a range of equivalence ratios ranging from 0.6 to 1.4. All explosions were initiated using 25 mj ignition energy at ambient conditions. The kernel growth rate, and cellular
flame structure are observed and analyzed.