含砂天然气套筒式节流阀内部两相流动特性分析  

Analysis of gas-sand two-phase flow characteristics in sleeve throttle valve

作　　者：史鸿博 王少聪 张行 赵新宇 叶际涵 SHI Hongbo;WANG Shaocong;ZHANG Xing;ZHAO Xinyu;YE Jihan(National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Wenling Fluid Machinery Technology Institute of Jiangsu University,Wenling,Zhejiang 317525,China;Shenjiang Valve Co.,Ltd.,Yueqing,Zhejiang 325605,China)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]江苏大学流体机械温岭研究院,浙江温岭317525 [3]慎江阀门有限公司,浙江乐清325605

出　　处：《排灌机械工程学报》2025年第2期139-146,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(52106043);中国博士后科学基金资助项目(2022M711376);江苏大学高级人才启动基金资助项目(20JDG058)。

摘　　要：为了提高节流阀在高含硫工况下的节流性能,以某套筒式节流阀为研究对象,采用欧拉-欧拉双流体模型,结合颗粒动力学理论和标准k-ε湍流模型,对阀门内部气固两相流场进行三维数值模拟研究,对比分析不同阀门开度、节流孔结构和尺寸、入口颗粒固含率下的速度场分布、湍流黏性场分布、流量特性与流阻特性等,并与试验结果进行对比.结果表明:阀门开度的增大可有效降低节流孔内部流速,缓解砂粒对节流孔内壁的冲蚀磨损,进而有利于阀门内部流体的流通;正三角形节流孔处存在明显的流速和压力梯度突变,且位于节流孔出口下游的对冲射流核心区域长度较长,导致严重冲蚀区域呈现出靠近节流阀出口侧的特征;砂粒冲击频次随着入口颗粒固含率的增加而增强,且节流孔入口区域存在的涡旋流动强度略有减弱,从而对节流阀整体的流通性能和冲蚀磨损程度产生影响.In order to improve the throttling performance of the throttle valve under high sulfur conditions,a sleeve choke valve was taken as the research object,and the 3D Euler-Euler multiphase mo-del combined with the standard k-εturbulence model was applied to investigate the gas-solid two-phase flow within a sleeve choke valve.The velocity field distribution,turbulent viscosity field distribution,flow characteristics and flow resistance characteristics under different valve openings,throttling hole structures and sizes,and inlet particle solid content were analyzed and afterward compared with the experimental results.The results show that the flow velocity within the equilateral nozzles decreases with the increase of the valve opening,which can alleviate the erosion wear on the nozzle wall and facilitate the flow of fluid inside the throttle valve.The velocity and pressure within the equilateral triangular nozzles change significantly in comparison with other nozzle structures.The core area of the opposing jet near the nozzle outlet is much longer,resulting in the severe erosion wear area close to the outlet of the throttle valve.In addition,the interaction frequency between sand particles increases with the increase of the solid concentration.The intensity of the vortex flow existing near the inlet of nozzles is slightly wea-kened,which significantly affects the overall flow performance and erosion wear of the throttle valve.

关 键 词：套筒式节流阀 含砂天然气 计算流体动力学 气固两相流 流场参数 

分 类 号：S275.6[农业科学—农业水土工程]