On the Detonation of a Methane-oxygen Mixture in a Plane-radial Chamber

Numerical modeling of the formation, subsequent ignition, and development of the detonation process in methane-oxygen mixtures within a flat radial chamber is performed using the Reynolds equations. Fuel and oxidizer are supplied separately to the chamber through valves in its rigid walls. The main equations are based on two-dimensional, non-stationary conservation laws for mass, momentum, and energy of a compressible, chemically reacting gas. The model accounts for turbulence and diffusion processes in multicomponent mixtures. It is shown that a self-sustaining detonation process occurs in the chamber even at relatively small shock wave amplitudes. The detonation wave parameters are largely determined by the mixing rate of the reacting components and the ability to reach ignition concentration limits.