Hydrodynamics and sediment transport in a meandering channel with a model axial‐flow hydrokinetic turbine
Hydrodynamics and sediment transport in a meandering channel with a model axial‐flow hydrokinetic turbine
复制标题
使用轴流式水力涡轮模型研究蜿蜒河道中的流体动力学和沉积物输送
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Guala
中科院分区：
文献类型：
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作者：
C. Hill;J. Kozarek;F. Sotiropoulos;M. Guala
在明尼苏达大学圣安东尼福尔斯实验室的室外溪流实验室研究设施中，对一个模型轴流式水力涡轮机（转子直径，dT = 0.15 m）与曲折河道内复杂的水动力学和泥沙输运过程之间的相互作用进行了研究。这种具有整体流量和泥沙排放控制的现场尺度曲流为模型涡轮机周围河床和水面高程的高时空分辨测量提供了位置。该装置安装在一个不对称的，可侵蚀的渠道横截面下迁移床的形式和固定的外银行的条件。在安装和未安装涡轮机的情况下，对流速和地形测量值进行了对比分析，突出了涡轮机引起的冲刷和沉积模式的局部和非局部特征。特别是，它显示了横截面几何形状如何变化，床形特征如何改变，以及涡轮机上游和下游的平均流场如何扭曲。我们进一步比较和讨论如何在曲折地区目前的能源转换部署将导致不同的相互作用之间的涡轮机操作和本地和非本地测深相比，直通道。
An investigation into the interactions between a model axial‐flow hydrokinetic turbine (rotor diameter, dT = 0.15 m) and the complex hydrodynamics and sediment transport processes within a meandering channel was carried out in the Outdoor StreamLab research facility at the University of Minnesota St. Anthony Falls Laboratory. This field‐scale meandering stream with bulk flow and sediment discharge control provided a location for high spatiotemporally resolved measurements of bed and water surface elevations around the model turbine. The device was installed within an asymmetric, erodible channel cross section under migrating bed form and fixed outer bank conditions. A comparative analysis between velocity and topographic measurements, with and without the turbine installed, highlights the local and nonlocal features of the turbine‐induced scour and deposition patterns. In particular, it shows how the cross‐section geometry changes, how the bed form characteristics are altered, and how the mean flow field is distorted both upstream and downstream of the turbine. We further compare and discuss how current energy conversion deployments in meander regions would result in different interactions between the turbine operation and the local and nonlocal bathymetry compared to straight channels.
影响因子：
9
作者：
A. Bahaj;L. Myers
通讯作者：
A. Bahaj;L. Myers