Submerged vanes are installed in waterways bed. These structures are usually used in groups and their main performance is to create an eddy current which leads to change in stream flow pattern and the bed topography in waterways. Performance of submerged vanes group depends on their arrangement and size. In this study using SSIIM numerical model, hydrodynamic analysis of flow pattern and bed topography around a single submerged vane in a straight channel was done and tried to estimate proper arrangement of submerged vanes group. The geometry of arrangement consisted of longitudinal distance between consecutive vanes, transverse distance of two adjacent vanes, and transverse distance of submerged vanes from the outer wall. Therefore, after verification of the results of numerical model with experimental data, flow pattern and topography of the bed around a vane with different dimensions and angles (in suggested domain) were investigated and analyzed. In this order, values of transverse and longitudinal distances of scouring hole at high-pressure and low-pressure sides of the vane from center of the vane were measured. Also values of transverse and longitudinal locations of the maximum scouring hole and maximum sedimentation downstream of the vane were determined. The results of these parameters were used to estimate the location of adjacent vanes. To reduce number of modes, the Taguchi method is used in design of simulations. Finally, mathematical relations are derived for geometry of arrangement versus vanes dimensions and angles. Comparison of the results of this research with the results of previous researchers, who have studied submerged vanes groups, showed that accuracy of the method used in this study is acceptable. The numerical results showed that the values obtained for the transverse and longitudinal distances of vanes are almost in the same range of previous laboratory studies.

中文翻译：

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利用单个叶片周围流动和床层形貌的数值模拟研究淹没叶片组在直冲积河道中的布置

水下叶片安装在水道床中。这些结构通常成组使用，其主要性能是产生涡流，从而导致水流模式和水道中的河床地形发生变化。浸没式叶片组的性能取决于它们的排列和尺寸。在这项研究中，使用 SSIIM 数值模型，对直通道中单个潜叶周围的流型和床形进行了水动力分析，并试图估计潜叶组的适当布置。布置的几何结构包括连续叶片之间的纵向距离、两个相邻叶片的横向距离以及淹没叶片到外壁的横向距离。因此，在用实验数据验证了数值模型的结果后，研究和分析了具有不同尺寸和角度（在建议的域中）的叶片周围的流动模式和地形。依次测量叶片高压侧和低压侧冲刷孔距叶片中心的横向和纵向距离值。还确定了最大冲刷孔的横向和纵向位置以及叶片下游的最大沉降值。这些参数的结果用于估计相邻叶片的位置。为了减少模式的数量，在模拟设计中使用了田口方法。最后，推导出布置的几何形状与叶片尺寸和角度的数学关系。将本研究结果与以往研究人员的结果进行比较，研究过水下叶片组的人表明，本研究中使用的方法的准确性是可以接受的。数值结果表明，获得的叶片横向和纵向距离值几乎在先前实验室研究的相同范围内。