基于差压式孔板流量计的缩径管段流场数值研究  

Numerical Simulation of Reducing Pipe in Standard Orifice Flow Meter

作　　者：林棋[1] 娄晨[1] 

机构地区：[1]中国石油大学(北京)油气管道输送安全国家工程实验室,北京102249

出　　处：《压力容器》2014年第2期29-37,共9页Pressure Vessel Technology

基　　金：国家科技重大专项:煤层气田集输系统优化技术(2011ZX05039-002)

摘　　要：基于ANSYS-CFX商业模拟软件,对差压式孔板流量计的内部流场进行数值模拟研究。计算了关于孔板流量计流出系数的4个主要影响因素:流量、粘度、缩径孔厚度及截面比,得到了不同模拟工况下的内部流场变化规律,同时借助数值模拟探讨了孔板流量计的冲蚀问题。将数值模拟流出系数计算值与基本经验公式编程计算值进行对比验证,结果显示两者吻合度高,误差基本控制在5%以内。研究表明,数值模拟可作为一种孔板流量计设计及标定的辅助方法。Simulating and studying the internal flow of differential pressure orifice flowmeter based on the commercial ANSYS-CFX.The paper talked about four main factors on discharge coefficient of orifice meter,including flow rate,viscosity,orifice thickness and diameter ratio.The pressure drop,Re,discharge coefficient value ,distribution of the flow field in various working conditions were derived ,also the erosion problem of orifice meter was explored by means of numerical simulation .The discharge coefficient a-chieved from numerical simulation was compared with which from the empirical formula ,and the results basically tallied ,with the error less than 5%.The ANSYS-CFX numerical simulation can be adopted as a support tool of design and certification in orifice meter .

关 键 词：标准孔板流量计 缩径管段 流场 数值模拟 C语言 

分 类 号：TH814[机械工程—仪器科学与技术] TQ055.8[机械工程—精密仪器及机械]