低压大流量热式气体质量流量计分流测试方法研究  

Research on Split Test Method of Low-Pressure High-Flow Thermal Gas Mass Flowmeter

作　　者：黎荣发 凌光盛 赵豪 张富源 谢代梁[2] 徐雅 Joseph W.F.Lai;LING Guangsheng;ZHAO Hao;ZHANG Fuyuan;XIE Dailiang;XU Ya(M-Tech Metering Solutions Co.Ltd.,Shenzhen 518116,China;China Jiliang University,Hangzhou 310018,China)

机构地区：[1]卓度计量技术(深圳)有限公司,深圳518116 [2]中国计量大学,杭州310018

出　　处：《计量科学与技术》2022年第8期3-6,12,共5页Metrology Science and Technology

基　　金：国家重点研发计划项目(2018YFF0216001);浙江省自然科学基金项目(LQ19E060005)。

摘　　要：热式气体质量流量计具有量程比大、精度高以及可靠性好等优点,可广泛应用于工业天然气、家用煤气以及医疗中氧气等气体流量的测量,在工业以及民用领域中有着广阔的应用前景。目前国内市场上低压天然气实流测试标准装置的最大测试流量通常只能达到40 m^(3)·h^(-1),无法对低压大流量气体质量流量计进行实流测试,给生产上带来很多不便。本文利用分流组件对热式气体质量流量计进行改装,通过数值模拟对分流组件与整表的流场特性进行了对比验证。采用实流测试设备对该分流组件进行实流测试,利用计算获得的流量比例系数获得流量计整表的流量性能,从而解决了低压天然气大流量气体质量流量计的实流测试问题。Thermal gas mass flowmeter has many advantages,such as large range ratio,high precision,and reliability.It can be widely used in the measurement of industrial natural gas,household gas,and oxygen in medical treatment.It has a broad application prospect in industrial and civil fields.At present,the maximum flow rate of low-pressure natural gas practical flow measurement standard device is usually only 40 m^(3)·h^(-1),which is unable to test the low-pressure high-flow gas mass flowmeter,bringing a lot of inconvenience to the production.In this paper,the thermal gas mass flowmeter is modified by using the split flow component,and the flow field characteristics of the split flow component and the whole meter are compared and verified by numerical simulation.The practical flow test equipment is used to carry out the practical flow test of the split flow component,and the flow rate performance of the flowmeter is obtained by using the flow proportional coefficient obtained by calculation,thus solving the practical flow test problem of the low-pressure high-flow gas mass flowmeter.

关 键 词：气体质量流量计 分流组件 实流测试 流量比例系数 数值模拟 

分 类 号：TH814.6[机械工程—仪器科学与技术]