Labyrinth type weirs are structures that, due to their geometry, allow the discharge capacity to be increased compared to linear weirs. They are a favorable option for dam rehabilitation and upstream level control. There are various geometries of labyrinth type weirs such as trapezoidal, triangular or piano key as well as different types of crest profiles. Geometric changes are directly related to hydraulic efficiency. The objective of this work was to analyze the hydraulic performance of a labyrinth type weir, by simulating several geometries of the apex and of the crest using Computational Fluid Dynamics (CFD). For model validation, experimental studies reported in the literature were used. Tests were carried out with trapezoidal and circular apexes and four types of crest profiles: sharp-crest, half-round, quarter-round and Waterways Experiment Station (WES). The results revealed a determination coefficient of R² = 0.984 between experimental and simulated data with CFD, which provides statistical agreement. Simulations showed that circular-apex weirs are more efficient than those with trapezoidal apex, because they have a higher discharge coefficient (4.7% higher). Of the four types of crest profiles analyzed, the half-round and the WES crest profiles had similar discharge coefficients and were generally greater than those of the sharp-crest and the quarter-round (5.26% y 8.5% higher) profiles. Nevertheless, to facilitate a practical construction process, it is recommended to use a half-round profile. For hydraulic heads with H_T/P > 0.5 ratio, all profiles generated sub-atmospheric pressures on the side walls of the weir. However, when H_T/P ≈ 0.8 ratio the half-round crest generated a higher negative pressure (−1500 Pa), while the sharp-crest profile managed to increase the pressure by 76% (−350 Pa), but with a greater area of negative pressure. On the other hand, the WES profile reduced the negative-pressure area by 50%.

迷宫式堰是一种结构，由于其几何形状，与线性堰相比，允许增加放电容量。它们是大坝修复和上游水位控制的有利选择。迷宫式堰有各种几何形状，如梯形、三角形或钢琴键以及不同类型的顶部轮廓。几何变化与水力效率直接相关。这项工作的目的是通过使用计算流体动力学 (CFD )模拟顶部和顶部的几种几何形状来分析迷宫式堰的水力性能。对于模型验证，使用了文献中报道的实验研究。使用梯形和圆形顶点以及四种类型的波峰轮廓进行了测试：尖波峰、半圆、四分之一圆和水道实验站 (WES)。结果揭示了R ²的决定系数 = 0.984 使用 CFD 的实验数据和模拟数据之间，这提供了统计一致性。模拟表明，圆形顶点堰比梯形顶点堰更有效，因为它们具有更高的流量系数（高 4.7%）。在分析的四种波峰剖面中，半圆形和 WES 波峰剖面具有相似的流量系数，并且通常大于尖峰和四分之一圆形（高 5.26% y 8.5%）剖面的流量系数。尽管如此，为了便于实际施工过程，建议使用半圆形轮廓。对于H _T /P  > 0.5 比值的液压头，所有剖面都在堰的侧壁上产生亚大气压力。然而，当H _T / P ≈ 0.8 比率，半圆形波峰产生了更高的负压 (-1500 Pa)，而尖峰剖面设法将压力增加了 76% (-350 Pa)，但负压面积更大。另一方面，WES 配置文件将负压区域减少了 50%。