Detonation front in homogeneous and heterogeneous high explosives

Messung des Chapman-Jouguet-Druckes mit Röntgen-Absorption

Zeitschrift für Naturforschung A ◽

10.1515/zna-1981-0503 ◽

1981 ◽

Vol 36 (5) ◽

pp. 437-442

Author(s):

K. Hollenberg ◽

H.-R. Kleinhanß ◽

G. Reiling

Keyword(s):

Free Surface ◽

Pressure Range ◽

Detonation Front ◽

Surface Velocity ◽

Free Surface Velocity ◽

High Explosives ◽

X Ray ◽

X Ray Absorption

Abstract The Chapman Jouguet pressure of some high explosives is measured by X-ray absorption giving the density behind the detonation front. An accuracy of 2 - 3% was achieved in the pressure range of 200 kbar. The pressures are considerably lower than comparable results of other authors obtained by the free surface velocity method or similar techniques.

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A SPH Implementation with Ignition and Growth and Afterburning Models for Aluminized Explosives

International Journal of Computational Methods ◽

10.1142/s0219876217500463 ◽

2017 ◽

Vol 14 (04) ◽

pp. 1750046 ◽

Cited By ~ 4

Author(s):

Guangyu Wang ◽

Guirong Liu ◽

Qing Peng ◽

Suvranu De

Keyword(s):

Growth Model ◽

Detonation Front ◽

High Explosives ◽

Combustion Chemistry ◽

Metal Combustion ◽

Military Industry ◽

Particle Hydrodynamics ◽

Long Time ◽

History Of ◽

Multi Phase

Aluminized explosives have been applied in military industry since decades ago. Compared with ideal explosives such as TNT, HMX, RDX, aluminized explosives feature both fast detonation and slow metal combustion chemistry, generating a complex multi-phase reactive flow. Though aluminized explosives have been employed for a long time, the mechanism underneath the chemical process is still not thoroughly understood. In this paper, a smooth particle hydrodynamics (SPH) method incorporated ignition and growth model, and afterburning model has been proposed for the simulation of aluminized explosive. Ignition and growth model is currently the most popular model for the simulation of high explosives, which is capable of accurately reproducing arrival time of detonation front and pressure history of high explosives. It has been integrated in commercial software such as ANSYS-LS DYNA. In addition, an afterburning model has been integrated in the SPH code to simulate the combustion of aluminum particles. Simulation is compared with experiment and good agreement is observed. The proposed mathematical model can be used to study the detonation of aluminized explosives.

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