The mechanism of liquid dispersing from a cylinder driven by central dynamic shock loading
| Autor: | Shou-tian Zhao, Xiaoxia Lu, Xiao-fang Yan, Xiao-bin Ren, Lei Li, Ye-jun Ren |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
History
Materials science Computational Mechanics Shell (structure) Education Cylinder (engine) law.invention Physics::Fluid Dynamics Shock waves law Cavitation layered Blast wave Pressure drop Shearing (physics) Liquid dispersing Mechanical Engineering Liquid spall fracture Metals and Alloys Mechanics Shell effects Reflected rarefaction waves Spall Computer Science Applications Shock (mechanics) Military Science Cavitation Ceramics and Composites |
| Zdroj: | Defence Technology, Vol 17, Iss 4, Pp 1313-1325 (2021) |
| ISSN: | 2214-9147 |
| Popis: | 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 analysed, 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. |
| Databáze: | OpenAIRE |
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