Modification of Richtmyer–Meshkov instabilities via layered explosive charge design

Author:

Hennessey M. P.1ORCID,Springer H. K.1ORCID,Belof J. L.1ORCID

Affiliation:

1. Physics and Life Sciences Group, Lawrence Livermore National Laboratory , 7000 East Avenue, Livermore, California 94550, USA

Abstract

In this numerical study, we investigate the effects of layered high explosive (HE) charge design on Richtmyer–Meshkov instability (RMI) in metal plates with sinusoidal surface features. The detonation wave from the HE induces a shock in the metal target that subsequently interacts with the surface features; this results in vortex formation and ultimately RMI. We seek to modify RMI by altering the detonation wave characteristics. The modification is investigated in a twofold manner: first, by varying the initial design of the unconfined surface of the target and second, by varying the charge design and composition. Within a limited scope of this design space, a wide variety of behaviors related to RMI growth are observed. Mechanistic actions, including exaggerated front curvature, behind these modifications are proposed. Charge designs, which modify RMI the most for a select target design, are then presented.

Funder

Lawrence Livermore National Laboratory

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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