Publisher : The Korean Society of Propulsion Engineers
DOI : 10.6108/KSPE.2016.20.2.075
Title & Authors
A Study on Shock-induced Detonation in Gap Test Kim, Bohoon; Kang, Wonkyu; Jang, Seung-gyo; Park, Jungsu; Yoh, Jai-ick;
A pyrotechnic system consisting of donor/acceptor pair separated by a gap relies on shock attenuation characteristics of the gap material and shock sensitivity of the donor and acceptor charges. Despite of its common use, numerical study of such pyrotechnic train configuration is seldom reported because proper modeling of the full process requires precise capturing of the shock wave attenuation in the gap prior to triggering a full detonation of high explosive and accurate description of the high strain rate dynamics of the explosively loaded inert confinements. We apply a Eulerian level-set based multimaterial hydrocode with reactive flow models for pentolite donor and heavily aluminized RDX as acceptor charge. The complex shock interaction, critical gap thickness, acoustic impedance, and go/no-go characteristics of the gap test are quantitatively investigated.
Gap Test;Pyrotechnic Initiator;Shock Attenuation;Critical Gap Thickness;Acoustic Impedance;
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