The flow through partially-open control valves in navigation locks, particularly at the early portion of an operation cycle, is characterized by high velocities, flow recirculation, significant pressure drops, and pressure fluctuations within the culverts. Optimizing the flow control system is a key point in hydraulic projects of high-drop locks. In order to analyze the hydraulic parameters of the mean flow and turbulence statistics through a navigation lock control valve, experimental and numerical work was undertaken. This paper focuses on the numerical aspects of the research. A physical model with a rectangular culvert (25 cm x 25 cm) test section with a segment gate (Tainter) installed in its inverted position was used in the experimental research. Physical tests were carried out under steady conditions for six gate openings and nine discharges. During these tests, mean and instantaneous pressures were recorded along the base and the ceiling of the culvert. The numerical investigation was carried out using the Computational Fluid Dynamics (CFD) software FLOW- 3D®. In FLOW- 3D®, the Reynolds-Averaged Navier–Stokes (RANS) equations were solved by the methods of finite volumes/finite differences in two dimensions. To solve the problem of closing RANS equations, the turbulence model $k-\epsilon$ was adopted. Based on the results, it was possible to verify that the numerical model very nicely reproduced the behavior of experimental data of mean hydraulic head and mean flow velocities. Although along the culvert ceiling, particularly close to the gate, the drop in mean pressure was slightly underestimated by the numerical model at the flow recirculating zone, it is possible to state with confidence that the overall results underscore the accuracy of this CFD approach in the study of the mean flow downstream from the control valves in navigation lock filling–emptying systems.

通过导航锁中部分打开的控制阀的流量，特别是在操作周期的早期，具有高速度，流量再循环，显着的压降以及涵洞内的压力波动的特点。优化流量控制系统是高空锁液压项目中的关键点。为了通过导航锁定控制阀分析平均流量和湍流统计的液压参数，进行了实验和数值工作。本文着重研究的数值方面。在实验研究中，使用了一个物理模型，该模型具有一个矩形涵洞（25厘米x 25厘米）的测试部分，并在其倒置位置安装了分段闸门（Tainter）。在稳定条件下对六个门开口和九个出口进行了物理测试。在这些测试中，沿涵洞的底部和顶部记录了平均压力和瞬时压力。数值研究是使用计算流体动力学（CFD）软件进行的FLOW-3D®。在FLOW - 3D®中，通过二维的有限体积/有限差分方法求解了雷诺平均Navier-Stokes（RANS）方程。为了解决闭合RANS方程的问题，湍流模型$ķ-\epsilon$被采纳了。根据结果​​，可以验证该数值模型很好地再现了平均水头和平均流速实验数据的行为。尽管沿着涵洞顶板，特别是靠近闸门，在流动再循环区的数值模型略微低估了平均压力的下降，但可以肯定地说，总体结果强调了这种CFD方法在管道中的准确性。研究了导航锁注水系统中控制阀下游的平均流量。