Numerical analysis of cavitation cloud shedding in a submerged water jet
Focused on the unsteady behavior of high-speed water jets with intensive cavitation a numerical analysis is performed by applying a practical compressible mixture flow method combined with a simplified bubble cavitation model.The mean flow of two-phase mixture is calculated by URANS for compressible fluid and the intensity of cavitation in a local field is evaluated by the volume fraction of gas phase varying with the mean flow field.High-speed submerged water jets issuing from a sheathed sharp-edge orifice nozzle are treated when the cavitation number σ =0.1 The result shows that cavitation occurs initially at the entrance of orifice and bubble cloud develops gradually while flowing downstream along the shear layer.Developed bubble clouds break up and then shed downstream periodically near the sheath exit.The pattern of cavitation cloud shedding evaluated by numerical simulation agrees to experimental data and the capability to capture the unsteadily shedding of cavitation clouds is demonstrated.
Cavitation bubble dynamics submerged water jet two-phase flow turbulent flow
Guoyi Peng Yasuyuki Oguma Seiji Shimizu
Department of Mechanical Engineering, College of Engineering, Nihon University Koriyama,Fukushima, 963-8642, Japan
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
263-269
2016-11-11（万方平台首次上网日期，不代表论文的发表时间）