Specific features of the gas-dynamic structure of supersonic axisymmetric microjets of a nonequilibrium SF6 gas

The effect of vibrational nonequilibrium of SF${}_{6}$ molecules on the gas dynamic structure of microjets is revealed, manifesting in a decrease in the longitudinal cell size of the wave structure and weakening of variations in flow parameters along the axis of the microjet compared to the equilibrium flow. The physical justification is found for the diameter of the nozzle, which is the boundary value between the macro- and microjets of vibrationally relaxing gases.