小口径液体涡轮流量传感器数学模型的研究  

Research on Mathematical Model for Small-bore Liquid Turbine Flow Sensor

作　　者：郭素娜 郑鑫 杨子航 刘旭 GUO Su-na;ZHENG Xin;YANG Zi-hang;LIU Xu(College of Quality and Technical Supervision,Hebei University,Baoding 071000,China;National&Local Joint Engineering Research Center of Metrology Instrument and System,Baoding 071000,China)

机构地区：[1]河北大学质量技术监督学院,河北保定071000 [2]国家和地方计量仪器与系统联合工程研究中心,河北保定071000

出　　处：《仪表技术与传感器》2021年第5期34-37,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61475041);河北省高层次人才资助项目(B2018003003);河北省高等学校科学技术研究项目(QN2018046);河北大学人才引进项目(1081/801260201225)。

摘　　要：针对磁阻力矩对小口径涡轮流量传感器性能影响较大,而对其定量计算又相当困难的问题,提出了利用计算流体力学(CFD)仿真获取磁阻力矩及轴与轴承间的摩擦力矩之和(T M)的方法,建立适用于小口径液体涡轮流量传感器的数学模型。利用完善后的数学模型对4种不同结构的10 mm口径涡轮流量传感器性能进行预测,并与实验结果进行对比分析。结果表明:利用数学模型预测的特性曲线与实验结果趋势相同,数值相近,平均仪表系数最大误差1.2%,线性度误差相差0.12%。Aiming at the problem that the magnetic resistance moment has great influence on the performance of small diameter turbine flow sensor and its quantitative calculation is quite difficult,mathematical model for small-bore liquid turbine flow sensor was developed,which contains sum of retarding torque due to attractive force of magnetoelectricity detector and mechanical friction in journal bearing(T M)calculated from computational fluid dynamics(CFD).The performance of 4 kinds of turbine flow sensor with diameter 10 mm was predicted using modified mathematical model for improvement.The results were compared with the experimental results.The characteristic curves predicted by the mathematical model have the same trend and similar values with the experimental results.The average meter factors differ no more than 1.2%,and the linearity errors differ no more 0.12%.

关 键 词：涡轮流量传感器 数学模型 CFD 特性曲线 平均仪表系数 线性度误差 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]