流体机械2025，Vol.53Issue(4)：102-109,8.DOI:10.3969/j.issn.1005-0329.2025.04.014
基于重叠网格的滑阀流场动态特性分析
Dynamic flow field analysis of sliding valves based on overset mesh
摘要
Abstract
To investigate the influence of different spool structures on the internal flow field of sliding valves during dynamic motion,unsteady simulations based on the overset mesh method were conducted to analyze the dynamic characteristics of the flow field in sliding valves with three spool types(standard spool,dual‑curve spool,and turbine‑blade spool,corresponding to outlet jet angles of 90°,45°,and 30°).The spool and valve chamber domains were defined in the foreground and background meshes respectively,enabling dynamic fluid domain variation during spool movement to simulate valve opening/closing.Results indicate that under a 1 MPa inlet‑outlet pressure difference,the maximum flow velocity reaches 50 m/s,generating lateral hydraulic forces up to 100 N.Dynamic changes in spool displacement significantly affect velocity,pressure,and turbulence distributions.Curved spools(dual‑curve and turbine‑blade)effectively reduce maximum turbulent kinetic energy(TKE)and outlet negative pressure backflow.The standard spool exhibits flow oscillation and negative pressure backflow during bidirectional regulation,causing flow instability with maximum TKE≈400 J/kg.The symmetric dual‑curve spool shows smaller directional dependence in flow fluctuations(maximum TKE≈330 J/kg).The turbine‑blade spool demonstrates superior flow regulation,pressure distribution,and turbulence suppression due to its enlarged inflow boundary.These results provide theoretical foundations and design guidelines for high‑precision sliding valves.关键词
液压滑阀/阀芯结构/重叠网格/动态数值计算Key words
hydraulic sliding valve/spool structure/overset mesh/dynamic numerical simulation分类
机械制造引用本文复制引用
袁志成,杨濛,叶天明,卞永明,侯泽然..基于重叠网格的滑阀流场动态特性分析[J].流体机械,2025,53(4):102-109,8.基金项目
国家重点研发计划项目(2023YFF0613200) （2023YFF0613200）
国家自然科学基金项目(52105395) （52105395）
国家自然科学基金青年科学基金项目(52205279) （52205279）
中央高校基本科研业务费专项(22120240031) （22120240031）
