Unsteady regimes of propellant combustion in a semiclosed space

Numerical simulations were used to study the nonstationary modes of propellant combustion in a semiclosed volume outside the boundaries of stationary combustion. The analysis was performed within the framework of phenomenological theory of nonstationary combustion for the simplest propellant combustion model containing the minimum number of governing parameters. It was demonstrated that the variation of one of the parameters can bring about the changeover from the stationary regime to the chaotic one according to the Feigenbaum scenario. A still further increase in the bifurcation parameter initiates transition to experimentally observed combustion regimes (extinction and so-called sneezing).