Numerical investigation of evolution of free-surface and sub-surface vortices in pump sump based on LES

摘要：

　　In this work, a numerical model based on LES is built to simulate the free-surface and sub-surface vortices in pump sump.A systematic analysis on validation of the LES model is done and the results are compared with the published experiment with respect to the transient flow feature and vorticity profile.A particular interest lays in the formation and evolution of free-surface and floor-attached vortices.The vorticity transport process in the presence of floor-attached vortex is revealed using the vorticity equation.The findings provide a deep insight in the application of LES in pump sump and the mechanism of vortex formation and evolution in the sump.

关键词： Vortex pump sump LES turbulence

作者: Ruijie Zhao Qiang Pan Desheng Zhang Weidong Shi Junjie Zhang

作者单位: Research Center of Fluid Machinery Engineering and Technology, Jiangsu University Zhenjiang, China Shanghai Institute of Quality Inspection and Technical Research Shanghai, China

会议类型: 国际会议

会议名称: The Second Conference of Global Chinese Scholars on Hydrodynamics(第二届全球华人水动学学术会议)

会议地点: 江苏 无锡

会议语种:英文

页码: 522-529

在线出版日期: 2016-11-11（万方平台首次上网日期，不代表论文的发表时间）