Analysis of Shock-Void Experiment

Woods, D T ; Robey, H ; Stry, P

Lawrence Livermore National Laboratory

关键词: 99;    Air;    Fabrication;    Images;   

DOI  :  10.2172/15003913
RP-ID  :  UCRL-ID-153417
RP-ID  :  W-7405-ENG-48
RP-ID  :  15003913

美国|英语

来源: UNT Digital Library

【 摘 要 】

The authors compare CALE simulations with recent experimental results of a laser-induced shock traversing a spherical under-dense region (''void''). In this report the experimental results are described, as well as several numerical attempts at explaining the observed radiographs. The conclusion is that the numerical simulations at this time cannot satisfactorily explain the experiment. The simulations also indicate that the introduction of air gaps between the under-dense sphere and the surrounding foam can greatly change the behavior of the shocked sphere. Thus fabrication details may play an important role in the detailed evolution of this experiment. Regardless of the simulations, analysis of the observed time sequence indicates that reproducibility of this experiment may be a factor. To settle this issue, further experiments of this kind will be required.