高水头大尺度船闸闸室消能明沟三维水力特性数值模拟

Three-dimensional numerical simulation of hydraulic characteristics of ditches designed for a navigation lock with high-head and large scale

针对我国某高水头大尺度船闸闸底纵支廊道明沟消能二区段出水输水系统,采用RNG k-ε紊流模型,结合闸室自由水面处理技术的VOF法,建立三维紊流数学模型,对船闸灌水过程的正常运行工况进行了水力特性数值模拟,分析闸室三维流场流速分布、侧支孔流量分布规律以及明沟消能机理。研究成果可为类似高水头船闸输水系统消能工布置提供技术参考。

Based on a practical navigation lock with high-head and large scale in China,we use RNG k-εmodel of turbulence flow and combine with VOF method to establish a corresponding 3d numerical model of the filling and emptying system,which is two areas through the ports introducing the water to the chamber from the main culverts designed at the bottom of lock chamber.We simulate the 3d hydraulic characteristics of the normal operation during the filling process,and analyze the flow field within the lock chamber,flow rate distribution of all the side ports and energy dissipation mechanism of ditches placed on the lock chamber bottom.The corresponding technical references from the research achievements can be provided for the design of the filling and emptying system.