传感技术学报2025，Vol.38Issue(10)：1768-1774,7.DOI:10.3969/j.issn.1004-1699.2025.10.006
测量环状流管道空隙率的电容传感器设计
Design of Capacitive Sensors for Measuring Void Fraction in Annular Flow Pipes
摘要
Abstract
Gas-liquid two-phase flow is common in petroleum and chemical industry,the proportion of gas phase in the gas-liquid two-phase stratified flow,i.e.,the void ratio,is of great significance in oil and gas transportation and chemical production process.The two-phase flow consisting of vacuum and water is used to simulate the two-phase flow of oil and gas in industry,and the theoretical model of capacitance sensor is established,by which the void fraction of the annular flow of the vertical pipeline can be measured,and the formula for the calculation of the void fraction is explained.In the comparison tests,two types of electrodes,plate type and ring type,are consid-ered.In order to determine the optimum gap size for each sensor type,several numerical tests are carried out and the parameters such as sensitivity and linearity of the two types of electrodes are discussed through the simulation data,and the numerical results show that the sensitivity of the ring electrode is better than that of the plate electrode,and the linearity of the plate electrode is better than that of the ring electrode.In the void ratio measurement experiment,the real-time waveform is displayed in the upper computer by connecting the acquisition card with the actual output of the measurement circuit.The reliability of the simulation results is verified by four sets of actu-al measurements and the calculation of the relative errors.关键词
空隙率/电容传感器/灵敏度/线性度/测量电路/相对误差Key words
void fraction/capacitive sensors/sensitivity/linearity/measurement circuits/relative error分类
信息技术与安全科学引用本文复制引用
刘欣阳,阚哲..测量环状流管道空隙率的电容传感器设计[J].传感技术学报,2025,38(10):1768-1774,7.基金项目
辽宁省教育厅基金项目(JYTMS20231448) （JYTMS20231448）
石油化工过程运行优化与节能技术国家地方联合工程实验室开放课题项目(LJ232510148001) （LJ232510148001）
