Numerical simulation of ignition and combustion boron gas suspension behind shock waves

A physico-mathematical model and a computational method have been developed to model the ignition and combustion of a suspension of boron particles in an oxidizer gas behind shock waves of varying intensity. Calculations were carried out for particles with a diameter of 1–20 $\mu$m at their volumetric concentrations $m_2$ = 10$^{-4}$ and 10$^{-5}$, corresponding to a lightly dusty medium. Oxygen and a mixture of oxygen and water vapor at a mass concentration of water vapor of 10–90% were considered as an oxidizer. The the structure of combustion waves was examined, and the behavior of the main parameters of the gas and particles was described. The influence of water vapor on the ignition delay time and burning time of boron particles was analyzed. The results were compared with experimental data available in the literature, and agreement on the ignition delay time at a surrounding gas temperature of 2200–3000 K was obtained.