Interaction between laminar flames of natural gas–oxygen mixtures and planar obstacles with asymmetrical openings

It was experimentally shown that the flame penetration limit, expressed by the diameter of the orifice, is less for a single asymmetrical obstacle (< 15mm under our conditions) than for a single symmetrical obstacle (20mm). It was revealed that the penetration limit increases with an increase in the number of obstacles with asymmetrical openings.