VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS

作     者：Abdul Karim BARBHUIYA,Subhasish DEY 

作者机构：West Bengal India. Lecturer Department of Applied Mechanics National Institute of Technology Silchar 788010 Assam India Associate Professor Department of Civil Engineering Indian Institute of Technology Kharagpur 721302 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2003年第18卷第4期

页      面：310-325页

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

主　　题：Abutments Three-dimensional flow Vortex flow Open channel flow Scour Sediment transport Fluvial hydraulics 

摘      要：The three-dimensional flow field in a scour hole around different abutments under a clear water regime was experimentally measured in a laboratory flume, using the Acoustic Doppler Velocimeter (ADV). Three types of abutments used in the experiments were vertical-wall (rectangular section), 45° wing-wall (45° polygonal section) and semicircular. The three-dimensional time-averaged velocity components were detected at different vertical planes for vertical-wall abutment and azimuthal planes for wing-wall and semicircular abutments. The velocity components were also measured at different horizontal planes. In the upstream, presentations of flow field through vector plots at vertical / azimuthal and horizontal planes show the existence of a primary vortex associated with the downflow inside the scour hole. On the other hand, in the downstream, the flow field shows a reversed flow near the abutments having a subsequent recovery with a passage of flow as a part of the main flow. The data presented in this p