文章基本信息

标题：The mechanism of liquid dispersing from a cylinder driven by central dynamic shock loading
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作者：Lei Li ; Xiao-xia Lu ; Xiao-bin Ren 等
期刊名称：Defence Technology
印刷版ISSN：2214-9147
出版年度：2021
卷号：17
期号：4
页码：1313-1325
DOI：10.1016/j.dt.2020.07.001
出版社：Elsevier B.V.
摘要：A systematic investigation on the mechanism of dynamic liquid dispersing process via theoretical and experimental approach is presented. The experiments include weak and strong constrained scenarios using the high-speed camera technique and the flash X-ray radiography technique. Based on dynamic analysis, one-dimensional characteristics analysis and some numerical simulations on the propagating processes of blast waves before the container shell rupturing, further and detailed analyses of the experimental results are presented. The effects of the liquid viscosity on the dynamic dispersing flow are also analyzed, and the spall fracture mechanism is explored. Thus, the dominating forces determining the dispersing liquid flow are revealed, that is, the stretching and shearing action due to the interaction of two reflecting rarefaction waves in opposite propagating directions. The influence of container shell strength on the dispersing liquid flow is also investigated, and the characters of cavitation layered in liquid before shell rupturing are uncovered. Results revealed that different shell material results in different cavitating layers. Then the different cavitating layers drive the different dynamic liquid dispersing process coming into being. The metastable liquid states caused by pressure drop and cavitation generation are discussed.
关键词：Shell effects;; Reflected rarefaction waves ; Liquid spall fracture ; Liquid dispersing ; Shock waves ; Cavitation layered