The shedding dynamics of unsteady cavitating flows around two different axisymmetric bodies
The unsteady cavitating flows around axisymmetric bodies with different scales of separation vortex are investigated based on experiments and numerical simulations.Compared with the experimental results, the numerical method can well predict the time-evolution process of unsteady cavitating flows.The details of cavity evolution process can vary with cavitation numbers as well as the headforms, especially for the shedding pattern which can be divided into two categories in this work.One shows large scale of cavity rolling up and shedding, and the other presents the conjunct process of different partial cavity and final shedding in form of small scale.Meanwhile, it is found that the former shedding pattern causes more productions of vorticity and turbulent fluctuations than the latter.Moreover, compared with that of conical headform, the unsteady cavitating flows around the blunt headform always presents larger scalc of cavity and higher levels of turbulent fluctuations as well as vorticity distributions.
Unsteady cavitating flows Cavity shedding PANS model Axisymmetric body
Changli Hu Youquan Cao Guoyu wang
School of Energy and Power Engineering, Nanjing University of Science and Technology,Nanjing 210094, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
国际会议
The Second Conference of Global Chinese Scholars on Hydrodynamics(第二届全球华人水动学学术会议)
江苏 无锡
英文
196-202
2016-11-11（万方平台首次上网日期，不代表论文的发表时间）