The Features of Interaction of Combustion Front with Flat Obstacles by the Example of the Flames of Methane-Oxygen Mixes

Abstract

It was shown that maximum pressure and maximum acoustic intensity are much greater for the obstacle with several openings as compared with the obstacle with single opening. It was shown that both minimum pressure of flame penetration and minimum diameter of an opening, through which the flame of the diluted methane-oxygen mix can penetrate decrease with an increase in the number of openings. Numerical calculations based on low Mach number approximation of the compressible reactive Navier-Stokes equations showed good qualitative agreement with experimental results. It was concluded that at assessment of a fire safety of the room or confinement with several openings one should not use the value of the minimum size of the single opening, because at an increase in the number of openings the size sufficient for flame penetration decreases.