U型科里奥利质量流量计温度影响特性分析
Analysis of Temperature Influence Characteristics of U-tube Coriolis Mass Flowmeter
余潋滟 1裴祥翔 1李想 2张小斌1
作者信息
- 1. 浙江省清洁能源与碳中和重点实验室;浙江大学制冷与低温研究所
- 2. 浙江省白马湖实验室
- 折叠
摘要
温度对用于液氢等低温流体流量测量的科里奥利质量流量计的影响不可忽略.基于卡氏第二定理,从能量角度出发建立了考虑温度影响的U型科里奥利质量流量计数学模型,并搭建了U型科里奥利质量流量计实验平台,通过实验数据对比验证了模型.在此基础上,考虑测量管固体物性参数对温度的依变,探究了温度对科里奥利质量流量计测量的影响规律,提出了一种包含弹性模量、泊松比和线膨胀系数的低温修正方法.经液氮数值仿真结果和液氦科里奥利质量流量计实验结果对比,发现对弹性模量、泊松比和线膨胀系数三者进行综合修正比恒定温度补偿系数修正的相对误差更小.成果有助于深入理解低温科氏流量计的测量特性.
Abstract
The influence of temperature on Coriolis mass flowmeter(CMF)used for low temperature fluid flow measurement such as liquid hydrogen cannot be ignored.Based on the Castigliano's second theorem,a mathematical model of U-tube CMF con-sidering the influence of temperature was established from the perspective of energy.The experimental platform of U-tube CMF was built and the model was verified by experimental data comparison.On this basis,considering the dependence of the solid physical parameters of the measuring tube on temperature,the influence of temperature on Coriolis flowmeter was explored,and a correction method including Young's modulus,Poisson's ratio and linear expansion coefficient was proposed at cryogenic tempera-ture.Through the numerical simulation of liquid nitrogen and comparison of liquid helium Coriolis flowmeter experience,it is found that the comprehensive correction of Young's modulus,Poisson's ratio and linear expansion coefficient is more precise than the constant temperature compensation coefficient correction.The research results are helpful to understand the measurement characteristics of CMF at cryogenic temperature.
关键词
科里奥利质量流量计/温度效应/数值分析/低温流体/流量测量/仪器仪表Key words
Coriolis mass flowmeter/temperature effect/numerical analysis/cryogenic fluids/flow measurement/instrument and meter引用本文复制引用
基金项目
国家重点研发计划(2022YFB4002900)
浙江省重点研发计划(2021C01099)
出版年
2024
NETL
NSTL
万方数据