Physicomathematical modeling of ignition and combustion of silane in transient and reflected shock waves

A model of nonequilibrium gas dynamics is proposed to describe ignition and combustion of a mixture of silane, hydrogen, oxygen, and an inert gas (nitrogen or argon). The model is based on detailed chemical kinetics of nonequilibrium chemical reactions. The model adequately describes the behavior of experimental data on the ignition delay time for this mixture versus the temperature behind the reflected shock wave in accordance with three criteria of ignition. The detonation wave velocity and equilibrium parameters of the mixture (pressure and temperature) are calculated as functions of the fuel-oxidizer equivalence ratio. Based on the dependences of the ignition delay time on the temperature behind the reflected shock wave calculated by this model, an approximation formula for the silane-oxygen-nitrogen/argon is derived.