Bivol

pp. 130-144

Propagation of the detonation wave in gas mixtures of methane with oxygen in a channel of variable cross section was studied experimentally. Detonation initiation was carried out by spark gap. Deflagration-to-detonation transition was occurred. A composition of the mixtures was selected in such a way that the detonation cell width was several times smaller than the diameter of the channel. The waves velocities and peak pressures at the front of the detonation wave were measured depending on the mixture composition, including a presence of nitrogen. The sizes of the detonation cells were measured using smoked foil mounted inside the channel. The effect of the interference of the shock waves in a conical section was studied. Diagrams of the shock waves, flame fronts, and detonation waves in the combustion chamber depending on the mixture composition are presented.