球阀瞬态关闭过程及水锤现象无网格法数值研究

打开文本图片集

关键词：球阀；瞬态关闭过程；水锤现象；移动粒子半隐式法中图分类号： TH137.52+2 文献标志码：ADOI：10.7652/xjtuxb202602020 文章编号：0253-987X（2026）02-0207-11

Meshless Numerical Study of Transient Closing Process in Ball Valves and Associated Water Hammer Phenomenon

JIA Zhibo， SUN Yijie，ZHOU Ziqi，SUN Zhongguo，XI Guang （School of Energy and Power Engineer，Xi'an Jiaotong University，Xi'an 71Oo49，China）

Abstract： To address the issues of mesh distortion，numerical instability，and interface errors encountered when traditional mesh-based methods are used to simulate the transient closing process of ball valves，a high-accuracy and stable pressure inlet/outlet boundary model based on the moving particle semi-implicit （MPS） method is proposed. Transient numerical simulation of the ball valve closing process was carried out，and the variations of the inlet/outlet pressure difference，flow coeficient，and flow resistance coefficient with the opening degree during the process from fully open to fully closed were obtained. By analyzing the velocity and pressure fields at different opening degrees，unsteady flow mechanisms such as flow separation，vortex generation，and water hammer phenomenon were revealed. The results show that the inlet/outlet pressure difference across the valve first increases and then decreases nonlinearly as the opening decreases. The flow coeficient changes gradually when the opening is greater than 70∘ ，but drops sharply when the opening is less than 70∘ . The flow resistance coefficient changes slowly when the opening is greater than 45∘ ，but increases significantly when the opening is less than 45∘ . As the opening decreases further， vortices form and expand in the outlet and the valve core flow passage，leading to intensified kinetic energy dissipation. A high-pressure zone in front of the valve coexists with a low-pressure zone behind the valve，and the fluid in the valve core approaches stagnation， resulting in static pressure accumulation. The water hammer pressure during valve closing first increases and then decreases；as the closing time increases， the maximum water hammer pressure gradually decreases. The results provide theoretical support for the design and optimization of ball valves and offer reference for improving the safety and stability of pipeline systems.

Keywords： ball valve; transient closing process； water hammer；moving particle semi-implicit method

球阀作为管道系统中常用的控制元件，主要承担调节管路流量，防止逆流及控制流向等作用，其以设计简单、密封性能可靠、使用寿命长等优点，广泛应用于石油化工、水利水电等行业的管道输运系统中[1]。（剩余16132字）