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首页> 外文会议>IAHR Congress >Flow disturbance patterns in which a hydraulic jump appears downstream of a single hemisphere on a stream bed: implications for sediment transport
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Flow disturbance patterns in which a hydraulic jump appears downstream of a single hemisphere on a stream bed: implications for sediment transport

机译：流动扰动模式，其中液压跳跃在流床上的单个半球下游出现：对沉积物运输的影响

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This study was designed to improve understanding of water and sediment movement around channel floor obstacles such as boulders in river beds. A hemisphere secured to the floor of a flume acted as a simple obstacle, and the flow over it was controlled to generate a hydraulic jump due to local acceleration over the downstream half of the hemisphere. The motion of water and sediment was observed. Previous studies have investigated fluid-dynamical character of flows around hemispheres (Schlichting, 1936; Taneda, 1956), the associated erosion of prepared sediment beds (Werner et al., 1980), the resistance to flow caused by in-stream structures (Morris, 1959), and have related the experimental flow character to associated microhabitats for fish (Franca et al., 2009). In previous flume studies, flows around isolated hemispheres have been subcritical everywhere in the flow-space and only Best and Brayshaw (1985) examined the fate of sediment added to a flume during a run.
机译：本研究旨在改善对河流楼层障碍物的水和泥沙运动的理解，如河床的巨石。一个半球固定在水槽的地板上充当一个简单的障碍物，并且控制它的流量被控制为产生液压跳跃，导致局部加速在半球下游的一半。观察到水和沉积物的运动。以前的研究已经研究了半球周围流动的流体动态特性（Schlichting，1936; Taneda，1956），所准备好的沉积床的相关侵蚀（Werner等，1980），抗流动结构引起的流动（莫里斯1959年），并将实验性流动性与鱼类（Franca等，2009）相关。在先前的水槽研究中，孤立的半球周围的流动已经在流动空间中的亚临界，只有最佳和Brayshaw（1985）在运行期间检查了添加到水槽中的沉积物的命运。

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