On 3D flow pattern behind a wall-mounted circular cylinder of finite-length

作     者：Václav Uruba Pavel Procházka 

作者机构：1Institute of Thermomechanics of the Czech Academy of Sciences Dolejškova 5 182 00 Praha 8 Czech Republic 2Faculty of Mechanical Engineering Department of Power System Engineering Universitní 8 Plzeň Czech Republic 

出 版 物：《AIP Conference Proceedings》 

年 卷 期：2021年第2323卷第1期

学科分类：07[理学] 0702[理学-物理学] 

摘      要：The wake behind a wall-mounted finite-length circular cylinder of the aspect ratio 2 stuck out of a wall was studied experimentally using stereo PIV technique. The cylinder was mounted normal to a ground plane and it was subjected to a cross-flow with thin boundary layer developed on the wall, the Reynolds number based on inflow velocity and cylinder diameter was 9.7 thousands. The time-averaged velocity and streamwise vorticity fields showed the development of the mean flow structure consisting of the tip vortex pair, the extent of the near-wake recirculation zone with back-flow, the downwash phenomenon and base vortex structures close to the wall.