基于CFD仿真的差压微小流量计设计  

Design of Differential Pressure Micro Flowmeter Based on CFD Simulation

作　　者：郭素娜 李光 季增祺 王帆 GUO Su-na;LI Guang;JI Zeng-qi;WANG Fan(National&Local Joint Engineering Research Center of Metrology Instrument and System,Hebei Key Laboratory of Energy Metering and Safety Testing Technology,School of Quality and Technical Supervision,Hebei University,Baoding 071002,China)

机构地区：[1]计量仪器与系统国家地方联合工程研究中心,河北省能源计量与安全检测技术重点实验室,河北大学质量技术监督学院,河北保定071002

出　　处：《仪表技术与传感器》2022年第3期45-49,56,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(62173122);河北省自然科学基金重点项目(F2021201031);京津冀协同创新共同体建设专项项目(20540301D)。

摘　　要：微小流量计量在能源计量、精准医疗等多种场合中有着广泛应用,但是目前测量微小流量的流量计普遍存在准确度低等问题。因此,文中以精准测量微小流量为目的,设计了差压式微小流量计。借助计算流体动力学(computational fluid dynamics, CFD)仿真技术,设计了流量计的基本结构。通过实流实验验证了设计方案的可行性。实验结果表明:差压式微小流量计可以实现流量范围在50~600 mL/h内的测量,线性度误差小于5%;在流量范围240~400 mL/h内的测量,线性度误差小于2%。Micro flow metering is widely used in many occasions such as energy measurement and precision medical treatment.However, current flow meters that measure micro flow generally have problems such as low accuracy.Therefore, this paper designed a differential pressure type small flow meter for the purpose of accurately measuring the small flow.With the aid of computational fluid dynamics(CFD) simulation technology, the basic structure of the flowmeter was designed.The feasibility of the design scheme was verified by the actual flow experiment.The experimental results show that the differential pressure type micro flowmeter can realize the measurement in the flow range of 50~600 mL/h, the linearity error is less than 5%.In the measurement flow range of 240~400 mL/h, the linearity error is less than 2%.

关 键 词：流量计量 微小流量 CFD仿真 差压式流量计 

分 类 号：TH814[机械工程—仪器科学与技术]