SIMULATION OF THE DYNAMICS OF IGNITION AND COMBUSTION OF BORON PARTICLES IN SHOOK WAVES

A numerical algorithm has been developed and simulation of the ignition and combustion of a boron microparticle of diameter from 7.5 to 20 μm in oxygen behind a shock wave refl ected from the wall has been simulated. The mathematical simulation is based on a modifi ed PSU model of boron combustion. The model takes into account boron boiling. The dynamics of ignition and combustion of a particle is obtained that includes heating of the oxide layer of B₂O₃ on the particle surface, the melting of this layer, evaporation and heating of a pure boron particle, its melting, boiling, and the corresponding chemical reactions. The computational algorithm was verifi ed with the use of experimental data. The argument is obtained on the ignition delay time in the ambient gas temperature range from 2200 to 3000 K.
   
Author:  I. A. Bedarev, A. A. Syrovaten′
Keywords:  ignition of particles, combustion of particles, boron, shock waves, numerical simulation.
Page:  1724