Author(s): Weichen Ren; Jingming Huang; Hongwei Zhang; Zhigang Wang
Linked Author(s):
Keywords: Filling process; Hydraulic simulation; Operational optimization; Siphon pipeline; Transient mixed flow
Abstract: The filling process of inverted siphon pipelines is a critical operation in long-distance water conveyance projects, involving complex transient mixed flows that challenge both safety and efficiency. This study presents a numerical simulation using Weighted-Average Preissmann (WAP) slot model to optimize this process for a 4.9 km siphon. Constant and variable discharge strategies were investigated. Results show that while higher constant flows reduce filling time, they linearly increase maximum pressure. A two-stage variable strategy is proposed: initiating with a high flow Q0 and switching to a lower flow Q1 as the pipe nears full capacity. This approach decouples the controls on time and pressure, i.e., Q0 governs filling duration, while Q1 dictates the maximum system pressure. The study provides a practical and efficient digital tool for optimizing the commissioning and operation of complex water infrastructure.
Year: 2026