A reactive flow model for heavily aluminized cyclotrimethylene-trinitramine

Abstract

An accurate and reliable prediction of reactive flow is a challenging task when characterizing an energetic material subjected to an external shock impact as the detonation transition time is on the order of a micro second. The present study aims at investigating the size effect behavior of a heavily aluminized cyclotrimethylene-trinitramine (RDX) which contains 35% of aluminum by using a detonation rate model that includes ignition and growth mechanisms for shock initiation and subsequent detonation. A series of unconfined rate stick tests and two-dimensional hydrodynamic simulations are conducted to construct the size effect curve which represents the relationship between detonation velocity and inverse radius of the charge. A pressure chamber test is conducted to further validate the reactive flow model for predicting the response of a heavily aluminized high explosive subjected to an external impact. V C 2014 AIP Publishing LLC.

Characterization of heavily aluminized energetic material for explosive testing and chemical modelling

“…(1 ) , respectively. The pressure sensitivity of the explosive is 0.7, and the compression sensitivity is 4 [16].…”

Analysis on shock attenuation in gap test configuration for characterizing energetic materials

“…The rate of chemical reaction is based on the ignition and growth steps previously built for the aluminized RDX. 7 The interface between two different materials is tracked through a hybrid particle level set method, and the material properties near the interface are determined through the ghost fluid method. Here, only a brief explanation of the method is outlined.…”

“…11 The chemical reaction and pressure growth of the energetic materials are calculated from the reactive flow model with JWL EOS as listed in Table II. 7,9 The JWL EOS parameters of product gas of pentolite are calculated with a thermo-chemical equilibrium code. 19 …”

Characterization of aluminized RDX for chemical propulsion

“…The constants of ignition I and growth G are set to 3. , respectively. The pressure sensitivity of the explosive is 0.7, and the compression sensitivity is 4 [16]. …”

“…An alternative to these two limiting forms of the reactive flow equation that we adapt in this work can be casted into a following form [16] such that …”