Numerical simulation of propagation of hybrid detonation waves in gaseous suspensions of boron particles in a hydrogen-air mixture

The structure of hybrid detonation waves in gas suspensions of boron particles in hydrogen-air mixtures of different compositions is calculated using the detailed kinetics of hydrogen combustion and the PSU-model of boron particle combustion. The effect of particle diameter and concentration on detonation wave velocity in a stoichiometric hydrogen-air mixture is revealed. It is shown that particles with a diameter of less than 5 $\mu$m enhance detonation waves in stoichiometric and rich mixtures, and those with a diameter of more than 10 $\mu$m only weaken detonation. The effect of the gas mixture composition on detonation processes is studied. It is revealed that, as the amount of oxidizer in the mixture decreases, the maximum detonation velocity decreases and shifts toward lower volume concentrations of particles.