大通径气动截止阀启闭过程流动特性研究及低噪声优化  

Flow Characteristics of Large Diameter Pneumatic Globe Valve During Opening and Closing Process and Low Noise Optimization

作　　者：徐文涛[1] 吴川 高隆隆[2] 卢超[1] 李宝仁[2] XU Wen-tao;WU Chuan;GAO Long-long;LU Chao;LI Bao-ren(China Ship Development and Design Center,Wuhan,Hubei 430064;FESTO Pneumatics Centre,School of Mechanical Science&Engineering,Huazhong University of Science&Technology,Wuhan,Hubei 430074)

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]华中科技大学机械科学与工程学院FESTO气动中心,湖北武汉430074

出　　处：《液压与气动》2020年第1期15-20,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51705164)

摘　　要：截止阀的流动特性是反映其工作性能的重要指标,目前这方面的仿真研究多集中于三维稳态和二维瞬态分析。建立了截止阀阀芯启闭过程流道动网格模型,采用网格光顺及局部重构的方法对大通径气动截止阀的启闭过程进行三维瞬态数值仿真,分析速度、压力、湍流动能等流场参数的动态变化规律。同时,根据瞬态仿真结果,将阀口的锥面倒圆并设计了一种安装在出口处的导流挡板,仿真结果表明优化后的平均声功率级降低了10 dB左右,有效降低了截止阀内部气流噪声的声功率级。为改善大通径气动截止阀的流体噪声提供了参考。The flow characteristics of the globe valve are important indicators reflecting its working performance.At present,the simulation research in this area mainly focuses on three-dimensional steady state and two-dimensional transient analysis.The dynamic mesh model is established to carry out the three-dimensional transient numerical simulation of the opening and closing process of the large-diameter pneumatic valve by adopting the smoothing and remeshing method.And the dynamic variation of flow field parameters such as the velocity,pressure,turbulent kinetic energy are analyzed.In the meantime time,according to the transient simulation results,the cone of the valve port is rounded,and a deflector installed at the outlet is designed.Simulation results show that after the optimization the average sound power level is reduced by about 10 dB which effectively reduces the sound power level of airflow noise inside the globe valve.The research provides a reference for improving the fluid noise of large-diameter pneumatic globe valves.

关 键 词：截止阀 动网格 三维瞬态分析 流体噪声 优化设计 

分 类 号：TH138.52[机械工程—机械制造及自动化]