Flow Around and Forces on a Pipeline Near a Scoured Bed in Steady Current
Flow Around and Forces on a Pipeline Near a Scoured Bed in Steady Current
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DOI：
10.1115/1.2919858
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发表时间：
1990-08
影响因子：
1.6
通讯作者：
B. Jensen;B. M. Sumer;H. Jensen;J. Fredsøe
中科院分区：
文献类型：
--
作者：
B. Jensen;B. M. Sumer;H. Jensen;J. Fredsøe
在水流中渐进冲刷过程的五个特征阶段，研究了一条最初放置在平坦可蚀床上的管道的流动。测量了沿流向和垂直于床面方向的速度。采用双色流动显示技术检测了随时间变化的流动结构。在流动显示的同时记录了圆柱体上的作用力。在研究的理论部分，采用了离散的旋涡模型(即单元云模型)来预测流动。早期的结果似乎揭示了实验所显示的流动的总体特征。
Flow around a pipeline placed initially on a flat, erodible bed was investigated at five characteristic stages of the progressive scour process in currents. The velocities, both in the streamwise direction and in the direction normal to the bed, were measured. A two-color flow visualization technique was used to detect the time-dependent flow structures. The forces on the cylinder were recorded simultaneously with the flow visualization. In the theoretical part of the study, a discrete vortex model (namely, the cloud-in-cell model) is employed to predict the flow. The early results appear to reveal the gross features of the flow shown by the experiments.