VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS
VORTEX FLOW FIELD IN A SCOUR HOLE AROUND ABUTMENTS
复制标题
基台周围冲刷孔中的涡流场
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Barbhuiya
中科院分区：
文献类型：
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作者：
Abdul;Karim;Barbhuiya
使用声学多普勒测速仪（ADV）在实验室水槽中对清水状态下不同桥台周围冲刷孔的三维流场进行了实验测量。实验中使用的三种基台是垂直壁（矩形截面）、45°翼壁（45°多边形截面）和半圆形基台。在垂直墙桥台的不同垂直平面和翼墙和半圆形桥台的方位平面上检测三维时间平均速度分量。还在不同的水平面上测量了速度分量。在上游，通过垂直/方位角和水平面的矢量图呈现的流场表明存在与冲刷孔内的下流相关的主涡。另一方面，在下游，流场在桥台附近显示出反向流动，并随后恢复，其中流动通道作为主流的一部分。本文提供的数据对于研究人员开发和验证桥台冲刷孔流场数学模型很有用。
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 paper would be useful to the researchers for the development and verification of mathematical models of flow field in a scour hole at bridge abutments.