Numerical simulation of the interaction of heterogeneous detonation with an inhomogeneous porous insert

Numerical simulation of interaction of heterogeneous detonation wave (DW) with a porous insert occupied whole channel and part of channel was carried out. Main regimes and critical conditions of detonation attenuation and failure in porous zones were obtained for micron and submicron aluminum particles. The main difference of regimes of detonation propagation for micron and submicron aluminum particles was found. It was found that for micron and submicron particles exists a critical height of porous free region, which leads to detonation failure. The critical width of the open space between porous bodies at which detonation failure occurs was found. For porous zones with two open spaces critical width of the open space is the same that is obtained for one open space. Critical conditions of porous inserts with open space area should be greater than for porous zone that occupies whole width of the channel.

Automated summary

Numerical simulation was conducted to investigate the interaction between heterogeneous detonation wave (DW) and a porous insert occupying whole or part of a channel. The main regimes and critical conditions for detonation attenuation and failure in porous zones were obtained for micron and submicron aluminum particles. Differences in detonation propagation regimes for micron and submicron aluminum particles were found. It was discovered that both micron and submicron particles have a critical height of porous free region, which leads to detonation failure. The critical width of the open space between porous bodies, at which detonation failure occurs, was determined. For porous zones with two open spaces, the critical width of the open space is the same as that for one open space. The critical conditions of porous inserts with open space area should be greater than those for porous zones that occupy the entire channel width.