On the flow structure of cloud cavitating flow around an axisymmetric body near the free surface

9th International Symposium on Cavitation

Wang, Yiwei^1 ; Wu, Xiaocui^1 ; Huang, Chenguang^1 ; Yu, Xianxian^1

Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing

100190, China^1

关键词: Asymmetric characteristic;    Axisymmetric bodies;    Cavitating flow;    Submerged condition;    Surface vehicles;    Vortex motion;    Vortex ring structures;    Vortex shedding process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012174/pdf
DOI  :  10.1088/1742-6596/656/1/012174

来源: IOP

【 摘 要 】

The influence of the free surface on the cavitating flow is an important issue involved in the design of high speed surface vehicles. In the present paper, unsteady cavitating turbulent flow around an axisymmetric body near the free surface was investigated by both launching experiment and LES simulation. The vortex motion induced by cavity shedding under the effect of the free surface is emphatically analyzed by comparing with the submerged condition. The vortex shedding process around the projectile is not synchronized, while the asymmetric characteristic in collapse process is more remarkable, with the generation of multiple vortex ring structures.