Shedding is one of the most important expressions of the instability of cavitating flow. Most previous research works were focused on the shedding mechanism induced by the re-entry jet. Shock induced shedding on a wedge is identified recently by using time resolved X-ray densitometry which attracted lots of attention. In the present paper, cavitation dynamics around an axisymmetric body are investigated. Both shock propagation and re-entry jet as inducing factors of shedding are observed in different cycles in a single experiment. Relevant numerical simulations are carried out based on a fully compressible approach under the framework of the open-source code OpenFOAM. Numerical and experimental results agree well with each other. Results indicate shedding is induced by the re-entry jet in the first cycle. Re-entry jet occurs and cut the cavity off on the should which induces the shedding of cloud cavity in the first cycle. However in the second and subsequent cycles, shocks are generated by the collapse of shedding cavities and propagate to the cavity closure and induces stronger re-entry jet. Its effect on cavity instability is indirect which still needs a strong re-entry jet as the medium media.
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ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting
July 15–20, 2018
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5156-2
PROCEEDINGS PAPER
Re-Entry Jet and Shock Induced Cavity Shedding in Cloud Cavitating Flow Around an Axisymmetric Projectile
Yiwei Wang,
Yiwei Wang
Chinese Academy of Sciences, Beijing, China
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Bingsheng Ye,
Bingsheng Ye
Chinese Academy of Sciences, Beijing, China
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Jingzhu Wang,
Jingzhu Wang
Chinese Academy of Sciences, Beijing, China
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Chenguang Huang
Chenguang Huang
Chinese Academy of Sciences, Beijing, China
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Yiwei Wang
Chinese Academy of Sciences, Beijing, China
Bingsheng Ye
Chinese Academy of Sciences, Beijing, China
Jingzhu Wang
Chinese Academy of Sciences, Beijing, China
Chenguang Huang
Chinese Academy of Sciences, Beijing, China
Paper No:
FEDSM2018-83200, V002T16A002; 4 pages
Published Online:
October 24, 2018
Citation
Wang, Y, Ye, B, Wang, J, & Huang, C. "Re-Entry Jet and Shock Induced Cavity Shedding in Cloud Cavitating Flow Around an Axisymmetric Projectile." Proceedings of the ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting. Volume 2: Development and Applications in Computational Fluid Dynamics; Industrial and Environmental Applications of Fluid Mechanics; Fluid Measurement and Instrumentation; Cavitation and Phase Change. Montreal, Quebec, Canada. July 15–20, 2018. V002T16A002. ASME. https://doi.org/10.1115/FEDSM2018-83200
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