The Development and Analysis of the Horseshoe-Shaped Vortex in the Near-Wall Region of Turbulent Boundary Layer

摘要：

The low-Reynolds-number full developed turbulent flow in channels was simulated using Large Eddy Simulation with the preconditioned algorithm and the dynamic subgrid-scale model, with a given disturbance in inlet boundary, after a short development section. The inlet Reynolds number based on momentum thickness was 670. The computed results showed good agreement with DNS, which included root mean square fluctuated velocity distribution and average velocity distribution. It was also found that the staggered phenomenon of the coherent structures was caused by subharmonic. The results clearly show the formation and evolution of the horseshoe vortex in the turbulent flow, including the symmetric vortex legs of horseshoe vortex structure and one-side leg of horseshoe vortex. Based on theses, the development of the horseshoe-shaped coherent structures was analyzed in turbulent boundary layer.

关键词： large eddy simulation the horseshoe-shaped vortex turbulent boundary layer coherent structures preconditioned algorithm

作者: SHI Wanli GE Ning CHEN Lin TANG Dengbin

作者单位: College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics,Nanjing 2 College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics,Nanjing 2 College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics,Nanjing 210016,C

会议类型: 国际会议

会议名称: The 3rd International Symposium on Jet Propulsion and Power Engineering(第三届喷气推进与动力工程国际会议 ISJPPE)

会议地点: 南京

会议语种:英文

页码: 206-211

在线出版日期: 2010-09-13（万方平台首次上网日期，不代表论文的发表时间）