In this research, the flow features around a spur dike located in a 90˚ sharp channel bend have been studied experimentally in detail. Results showed that the effects of the spur dike on upstream sections increased by increasing α (spur dike location from the beginning of the bend). In addition, by increasing α, the horseshoe vortex (C3) and secondary flow in the channel bend (C1) strengthened. The energy and the Reynolds shear stress in the C3 region decreased by increasing α. It is recommended to use a Barycenteric Map (BM) instead of the normal Reynolds stresses to find the anisotropy nature accurately. A strong anisotropic condition was detected at the border of the recirculation flow region and the main flow. However, in the C3 and the interaction regions, the isotropy condition improved. In the main flow region, by increasing α, the isotropy degree improved. However, by increasing α, an increase in the development of the region with a high anisotropy degree towards the recirculation region was observed. The anisotropy degree in the near-bed layer region and the shear layer region is comparable. However, the anisotropy nature is different. The maximum error of the numerical simulation based on isotropic turbulence occurred at the shear layer region where the severe cigar-shaped turbulence occurred.

在这项研究中，实验详细研究了位于 90˚ 急弯河道中的丁坝周围的流动特征。结果表明，丁坝对上游部分的影响随着 α（弯头开始的丁坝位置）的增加而增加。此外，通过增加α，马蹄涡（C3）和通道弯道（C1）中的二次流加强。C3 区域的能量和雷诺剪切应力随着 α 的增加而降低。建议使用重心图 (BM) 而不是正常的雷诺应力来准确地找到各向异性性质。在再循环流区域和主流的边界处检测到强烈的各向异性条件。然而，在 C3 和相互作用区域，各向同性条件得到改善。在主流区，通过增加α，各向同性程度提高。然而，通过增加 α ，观察到具有高各向异性程度的区域向再循环区域的发展增加。近床层区与剪切层区各向异性程度相当。但是，各向异性的性质不同。