Research on the response characteristics and operation control of unsteady water transport in Huangchigou water distribution hub

Abstract

The water transfer project has alleviated the shortage of water resources, but frequent scheduling of water distribution hubs can harm the water transmission buildings. This article is based on the RNG k-ε turbulence model to construct a three-dimensional mathematical model of the water flow passing through the gate of the North-Line of the Huangchigou water distribution hub of the water diversion from the Han to the Wei River. Combined with the physical model experiment, the influence of the unsteady flow process of the North-line of the Huangchigou water distribution hub on the hydraulic response in its water distribution tank and tunnel is investigated. The research results indicate that, when the North-line gate closes faster, the earlier the overflow occurs in the side-channel spillway, increasing in abandoned water volume. In addition, excessively rapid gate adjustment can result in a sharp increase in pressure in front of the North-line gate. It will also increase the cavity area caused by the detachment of the bottom edge of the gate, forming a strong vortex behind the gate. From the perspective of safe operation of the gate, the closing time of the North-line gate should not be less than 100s. The research results can provide reference for the design, safe operation, and emergency control of water transmission and distribution hub projects.