水资源与水工程学报2025，Vol.36Issue(6)：122-129,8.DOI:10.11705/j.issn.1672-643X.2025.06.15
基于动网格技术的底轴驱动翻板闸门开启过程瞬态水力特性研究
Investigation on transient hydraulic characteristics of bottom-hinged flap gates during opening based on dynamic mesh technique
摘要
Abstract
During the opening process of bottom-hinged flap gates,high-velocity overflow often occurs at the gate crest,resulting in the formation of a negative pressure zone behind the gate.This phenomenon can induce structural vibrations and pose significant threats to operational safety.To investigate the mech-anisms of these vibrations,a two-dimensional transient numerical simulation model was developed in An-sys Fluent by coupling the volume of fluid(VOF)two-phase flow model with a dynamic mesh technique.The model simulated the evolution of the free surface,velocity distribution,and pressure characteristics during the entire opening process of the gate from fully closed to fully open.We investigated the coupling mechanism between gate motion and flow field dynamics,and clarified the interaction pathway of"over-flow impact-negative pressure formation-vibration excitation".The results show that pronounced over-flow forms at the gate crest during opening,entraining air and forming a localized low-pressure region be-hind the gate.As the gate opening angle increases,the negative pressure zone expands and reaches its maximum at 225 seconds,which is identified as a key trigger of vibration.With further opening until the gate is fully raised,the flow gradually submerges the gate body,the overflow weakens,the negative-pres-sure zone dissipates,the water-air two-phase flow tends to stabilize,and the pressure distribution in the domain becomes more uniform,leading to a marked reduction in vibration risk.The findings provide the-oretical insights and an efficient simulation methodology for vibration mechanism identification,anti-vi-bration design optimization,and safe operational control of flap gates.关键词
底轴驱动翻板闸门/动网格技术/VOF两相流模型/瞬态水力特性/门顶溢流Key words
bottom-hinged flap gate/dynamic mesh technique/VOF two-phase flow model/transient hydraulic characteristics/gate crest overflow分类
建筑与水利引用本文复制引用
徐强,张建华,张松匀,冯慧慧,叶子青..基于动网格技术的底轴驱动翻板闸门开启过程瞬态水力特性研究[J].水资源与水工程学报,2025,36(6):122-129,8.基金项目
中国中铁股份有限公司科技研究开发计划项目(2023-Key-05) （2023-Key-05）
国家自然科学基金项目(51705131) （51705131）
