Refined 1D–3D Coupling for High-Frequency Forced Vibration Analysis in Hydraulic Systems

High-Frequency Pressure Fluctuation (HFPF) is an extensively observed hydraulic phenomenon in pumped-storage power stations and water conveyance projects. The investigation of the propagation characteristics pressure perturbation great significance for safe operation facilities. In this study, a one-dimensional (1D)–three-dimensional (3D) coupling model established based on combination Method Characteristics (MOC) Computational Fluid Dynamics (CFD) implanted open source software OpenFOAM. study implants dynamic mesh module into original OpenFOAM solver sonicLiquidFoam presents complete solution procedure CFD with considered. vibration pipe walls modeled by motion employed to numerically generate HFPF system, which could not be implemented traditional MOC model. independence pipeline system validated time-domain variation. graphical method applied describe multiple reflection superposition traveling wave simplified system. Based this, mechanism superimposed characteristic standing waves are analyzed, theoretical processes variations oscillation magnitude analyzed presented. 1D–3D analysis referenced other complex systems.