Numerical Modeling of Underwater Explosion Properties for an aluminized explosive

Abstract

Agency for Defense Development, Yuseong, Taejon 305-600 Rechenmodell fur die Unterwasserexplosionseigenschaften eines Aluminium-haltigen Sprengstoffes Die Unterwasserexplosionseigenschaften des Aluminium-haltigen Sprengstoffs DKD-03 wurden berechnet mit zwei Burn-Techniken, einer programmierten Burn-Technik und einer Geschwindigkeitsgleichung, h e entwickelt w d e aus zweidimensionalen stetigen Detonationsversuchen auf der Grundlage der StoRdynamik der Detonation. Die Berechnung nach der programmierten Burn-Technik erbrachte keine gut reproduzierbaren Ergebnisse, 12% bis 34% Abweichung im Druckmaximum und 20% in der Blasenperiode. Die Berechnung unter Verwendung der Geschwindigkeitsgleichung gab die experimentellen Beobachtungen sehr gut wieder. Obwohl es einige Unterschiede im Druckmaximum gab, stimmte das StoRprofil sehr gut mit den experimentellen Werten iiberein. Die berechnete Blasenperiode stimmte mit den experimentellen Daten bei einer Abweichung von 1% uberein. Dieses Ergebnis zeigt, dal3 die Unterwasserexplosionseigenschaften bei Aluminium-haltigen Sprengstoffen nur berechnet werden kann, wenn die langsame Energiefreisetzung des Aluminiums korrekt berechnet wird. SummaryUnderwater explosion properties of an aluminized explosive, DXD-03, were numerically modeled by two bum techniques; a programmedbum technique and a rate equation calibrated from two-dimensional steady-state detonation experiments based on the detonation shock dynamics. The modeling by using the programmed-burn technique did not reproduce experimental data well; 12% to 34% error in peak pressure and 20% error in bubble period. The modeling by using the rate equation reproduced the experimental observations very well. Although there was some difference in peak pressure, the shock profile agreed very well with experimental observation. The calculated bubble period agreed with the experimental data within 1%. This result demonstrates that the underwater explosion properties for aluminized explosives can be calculated only when the slow energy release of aluminium is modeled properly.

The Role of Al Reaction Rate in the Damage Effect and Energy Output of RDX‐Based Aluminized Explosives in Concrete

“…In aluminized explosives, a substantial amount of energy is released after the C-J surface. In order to account for the late energy re-lease in aluminized explosive, the time-dependent JWL-EOS has been used to describe the relationship between detonation product pressure P and relative volume V [12,15,16], the equation is:…”

Numerical and experimental study on cyclotrimethylenetrinitramine/aluminum explosives in underwater explosions

“…Energy release from classic and basic non-ideal aluminized explosives can be divided into the heat of detonation and combustion, where the latter is generated by burning fuel-rich products that are created by the detonation. 2 The energy output of aluminized explosives after detonation includes three parts: shock wave energy, bubble energy, and thermal loss. The three-part energy distribution and attenuation variation when propagating in water must be taken into account to design explosives.…”

“…Shock pressure-time curves and total impulse were estimated at different locations and compared for different Al contents. (2) To study the problems of bubble oscillation simulation according to the test results and to provide a newer, simpler onedimensional (1D) model to simulate bubble motion precisely. (3) To analyze the characteristics of output energy structure and to determine the specific distance of maximum total energy.…”