Experimental study of bed evolution around a non-slender square structure under combined solitary wave and steady current actions
Experimental study of bed evolution around a non-slender square structure under combined solitary wave and steady current actions
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DOI：
10.1016/j.oceaneng.2022.112792
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发表时间：
2022-12
影响因子：
5
通讯作者：
Erdinc Sogut;Deniz Velioglu Sogut;A. Farhadzadeh
中科院分区：
文献类型：
--
作者：
Erdinc Sogut;Deniz Velioglu Sogut;A. Farhadzadeh
本文通过波浪水槽试验，研究了孤立波、孤立波与定常顺流组合、孤立波与定常逆流组合三种水流条件下，非细长方形直立结构物周围冲刷的形成和演变规律。该结构被放置在桑迪护堤上，固定在水槽壁上或位于水槽中心线处。对于只有波浪的情况，无论结构物的位置如何，海滨边缘的冲刷都比背风侧的冲刷深。分析表明，冲刷的深度，宽度，体积和位置都显着影响的恒定流的引入。例如，随后的水流加深了海滨冲刷，同时由于潮汐过程导致较浅的背风冲刷坑。相反，反向流，这将转移冲刷区的上游方向，冲刷下波的后续流的影响下进行。冲刷深度被确定为结构位置和Keulegan-Carpenter数的函数，而冲刷宽度主要取决于结构的位置。在这方面，无论水流条件如何，固定在墙上的结构物都经历了最宽的冲刷面积和最大的体积。
This paper presents the findings from the laboratory wave flume experiments designed to investigate the formation and evolution of scour around a non-slender, square vertical structure, under three flow conditions, solitary wave, combined solitary wave and steady following current, and combined solitary wave and steady opposing current. The structure was placed on a sandy berm, either fastened to the flume wall or positioned at the centerline of the flume. For the wave only case, the scour on the seaside edge turned out to be deeper than the one on the leeside regardless of the structure's position. The analyses showed that the depth, width, volume, and location of the scour were all significantly influenced by the introduction of steady currents. The following current, for example, deepened the seaside scour, while leading to shallower leeside scour holes as a result of the backfilling process. Contrary to the opposing current, which shifted the scour area in the upwave direction, the scour was transported downwave under the effect of the following current. The scour depth was determined to be a function of the structure position and the Keulegan-Carpenter number, whereas the scour width mostly depended on the structure’s position. In this regard, the structure fastened to the wall experienced the widest scour area and the largest volume regardless of the flow condition.