气动单向阀开启过程流场特性分析  

Analysis of Flow Field Characteristics in the Opening Process of Pneumatic Check Valve

作　　者：李延民[1] 杨创 张瑞[1] LI Yanmin;YANG Chuang;ZHANG Rui(School of Mechanical and Power Engineering,Zhengzhou University,He’nan Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《机械设计与制造》2025年第2期153-157,163,共6页Machinery Design & Manufacture

基　　金：河南省交通运输科技计划项目(2019J2)。

摘　　要：基于质量守恒方程和三维时均N-S方程,并利用动网格技术,对气动单向阀的开启过程进行了三维动态仿真。在ANSYS/Fluent 19.0中采用四面体非结构网格、标准k-ε湍流模型和SIMPLE算法,并导入控制阀芯运动的UDF,真实地模拟单向阀开启的动态过程,得到内流场中流体速度、压力、湍流动能和湍流动能耗散率等变量的变化情况。由计算结果发现,在单向阀开启过程中,小开度时,在阀口处的流速比较大,随着开度的增大,阀芯背侧的流场越来越复杂,弹簧座前后出现了比较强的漩涡。据此对单向阀的结构进行改进,减少流体通过阀时的能量损失。Based on the mass conservation equation and the three-dimensional time-mean N-S equation,the three-dimensional dynamic simulation of the opening process of a pneumatic check valve is carried out by using the dynamic mesh technology.In ANSYS/Fluent 19.0,tetrahedral unstructured mesh,standard k-εturbulence model and SIMPLE algorithm are adopted,and UDF is imported to control the movement of the valve core.The dynamic process of the unilateral valve opening is simulated,and the changes of fluid velocity,pressure,turbulent kinetic energy and turbulent dissipation rate in the internal flow field are ob⁃tained.Through the analysis of the calculation results,it can be found that in the process of opening the unilateral valve,when the opening is small,the flow velocity at the valve port is relatively large.With the increase of the opening,the flow field at the back side of the valve core becomes more and more complex.There is a strong vortex before and after the plug.Therefore,the struc⁃ture of the check valve is improved to reduce the energy loss when the fluid passes through the flow field.

关 键 词：单向阀 动网格技术 UDF CFD 内流场 

分 类 号：TH16[机械工程—机械制造及自动化] TH138.5