Naslov
Shock Initiation and Propagation of Detonation in ANFO

Autori
Bohanek, Vječislav ; Štimac Tunara, Barbara ; Serene, Chan Hay Yee ; Sućeska, Muhamed

Kolaboracija
IP-2019-04-1618, “An improved nonideal detonation model of commercial explosives” (NEIDEMO)

Izvornik
Energies (1996-1073) 16 (2023); 1-13

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ANFO ; shock initiation ; detonation ; numerical modeling ; EXPLO5 ; AUTODYN

Sažetak
The ammonium nitrate (AN) and fuel oil (FO) mixture known as ANFO is a typical representative of non-ideal explosives. In contrast to ideal explosives, the detonation behavior of ANFO exhibits a strong dependence on charge diameter, existence, and properties of confinement, with a large failure diameter and long distance required to establish steady-state detonation. In this study shock initiation and propagation of detonation in ANFO were studied experimentally by determining the detonation velocity at different distances from the initiation point, as well as by numerical modeling using AUTODYN hydrodynamics code and a Wood–Kirkwood detonation model incorporated into EXPLO5 thermochemical code. The run-to-steady-state detonation velocity distance was determined as a function of charge diameter, booster charge mass, and confinement. It was demonstrated that a Lee–Tarver ignition and growth reactive flow model with properly calibrated rate constants was capable of correctly ascertaining experimentally observed shock initiation behavior and propagation of detonation in ANFO, as well as the effects of charge diameter, booster mass, and confinement.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

Napomena
Glavni autor V. Bohanek

POVEZANOST RADA