论文部分内容阅读
输水过程是船闸运行的关键环节,而要保证船闸是否工作主要依赖于输水系统设计性能的好坏,其核心在于输水系统水动力学的研究。该文针对带格栅消能室的集中输水系统,通过建立整体输水系统数学模型,采用RNG k-双方程紊流模型,对输水阀门的开启过程运用动网格技术,结合自由水面处理技术的VOF法,对船闸充水过程的正常运行工况进行了三维水力特性动态仿真研究,并分析了闸室三维流速场及消能格栅孔的流量分布。同时,提出了闸室横断面流速分布均匀度计算公式。根据试验观测的闸室水位、输水流量和流速过程线与物理模型实测数据对比,结果表明两者吻合较好,从而说明利用该方法进行船闸输水过程非恒定流三维数值模拟,不仅可作为物理模型试验的有力补充,且可为船闸输水系统设计提供可靠的科学依据,是船闸水动力学研究的有效途径。
The process of water delivery is the key link of ship lock operation. To ensure the work of ship lock depends on the design performance of water delivery system, its core lies in the study of hydrodynamics of water conveyance system. In this paper, aiming at the centralized water delivery system with grid energy dissipation chamber, by establishing the mathematical model of the whole water delivery system, using RNG k-two equation turbulence model, the open grid valve technology is applied to the opening process of the water delivery valve, VOF method was used to simulate the three-dimensional hydraulic characteristics of the normal operation of the ship’s water-filling process. The flow distribution in the three-dimensional flow field and the grid of the energy-saving grid were analyzed. At the same time, the calculation formula of flow velocity distribution uniformity in gate chamber is proposed. According to the observed data of chamber water level, water flow rate and flow rate, the results show that the two agree well with each other, which shows that the three-dimensional numerical simulation of unsteady flow of ship lock water conveyance using this method not only can be used as Physical model test is a powerful supplement, and can provide reliable scientific basis for ship lock water system design. It is an effective way to study the hydrodynamics of ship lock.