Modeling of propellant flow and explosively-driven valve for the Large-Bore Powder Gun

18th APS-SCCM; 24th AIRAPT

Lam, Kin^1

Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

关键词: Computational simulation;    Impact events;    Impact experiment;    Interior ballistic calculations;    Nevada Test Site;    Propellant flow;    Prototype experiment;    Target chambers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/15/152008/pdf
DOI  :  10.1088/1742-6596/500/15/152008

来源: IOP

【 摘 要 】

The Large-Bore Powder Gun is being developed to provide impact experiments on physics samples at the Nevada Test Site. A confinement system is required to seal the target chamber from the gun system to keep it free of hazardous materials from the impact event. A key component of the confinement system is an explosively driven valve (EDV), which uses a small amount of explosive to drive an aluminum piston perpendicular to the barrel axis into a tapered hole. The objective of this study is to evaluate designs of the confinement system via computational simulations using models validated with prototype experiments. A novel approach is adopted for this work, in which an energy source developed based on interior ballistic calculations was implemented in a hydrocode, which in turn was used to model the propellant flow, EDV operation, and their interactions. This paper describes the models and some simulation results leading to a proposed confinement system design.