Flows with an Overcompressed Detonation Wave in Variable-Area Channels

Numerical simulation of flows of an inviscid chemically active hydrogen–air mixture with overcompressed detonation wave in the quasi-two-dimensional and two-dimensional formulations is carried out. Simulation is carried out by integrating Euler’s equations supplemented with the equations of physico-chemical kinetics of hydrogen combustion in air with 18 chemical reactions in a 9-component mixture. In the quasi-two-dimensional formulation, steady-state flows with overcompressed detonation wave are obtained for various values of the excess air coefficient. In the two-dimensional formulation, a solution with overcompressed detonation wave is obtained and the effect of mixture inhomogeneity on the flow with formation of a detonation wave and its cellular structure is studied.